True statements about the cerebral blood flow include: a. it is constant for the blood pressure in the range between 50-150mmHg b. hypocapnia causes vasoconstriction c. cerebral arterioles constricts when the blood pressure raises d. all above

True statements about the cerebral blood flow include:
a. it is constant for the blood pressure in the range between 50-150mmHg
b. hypocapnia causes vasoconstriction
c. cerebral arterioles constricts when the blood pressure raises
d. all above
by

1 Answer

Answer :

all above
by

Related questions

True statements about the cerebral blood flow include: a. it is constant for the blood pressure in the range between 50-150mmHg b. the blood pressure is affected more by the PaO2 than PaCO2 c. hypocapnia causes vasoconstriction d. cerebral arterioles constricts when the blood pressure raises

Description : True statements about the cerebral blood flow include: a. it is constant for the blood pressure in the range between 50-150mmHg b. the blood pressure is affected more by the PaO2 than PaCO2 c. hypocapnia causes vasoconstriction d. cerebral arterioles constricts when the blood pressure raises

Last Answer : it is constant for the blood pressure in the range between 50-150mmHg

True statements about cerebral blood flow: a. it is controlled mainly by the autonomic nervous system b. cerebral arterioles constricts when the blood pressure is raised c. it is constant in the blood pressure range of 50 to 150 mm Hg systolic d. hypocapnia increases the cerebral blood flow

Description : True statements about cerebral blood flow: a. it is controlled mainly by the autonomic nervous system b. cerebral arterioles constricts when the blood pressure is raised c. it is constant in the blood pressure range of 50 to 150 mm Hg systolic d. hypocapnia increases the cerebral blood flow

Last Answer : it is constant in the blood pressure range of 50 to 150 mm Hg systolic

Hyperventilation: a. decreases cerebral blood flow b. increases ionized calcium concentration in the serum c. causes hypocapnia d. causes metabolic alkalosis

Description : Hyperventilation: a. decreases cerebral blood flow b. increases ionized calcium concentration in the serum c. causes hypocapnia d. causes metabolic alkalosis

Last Answer : causes hypocapnia

Following acute haemorrhage, the following compensatory mechanisms occur: a. increased chemoreceptor discharge b. increased level of circulating angiotensin II c. vasoconstriction of renal efferent arterioles d. all above

Description : Following acute haemorrhage, the following compensatory mechanisms occur: a. increased chemoreceptor discharge b. increased level of circulating angiotensin II c. vasoconstriction of renal efferent arterioles d. all above

Last Answer : all above

Determinants of cerebral blood flow include: A. Preoperative neurologic dysfunction. B. Arterial CO 2 tension. C. Arterial O 2 tension. D. Systemic arterial pressure. E. All of the above.

Description : Determinants of cerebral blood flow include: A. Preoperative neurologic dysfunction. B. Arterial CO 2 tension. C. Arterial O 2 tension. D. Systemic arterial pressure. E. All of the above.

Last Answer : Answer: BCD DISCUSSION: Determinants of cerebral blood flow include arterial CO 2 and O 2 tensions, systemic arterial pressure, and temperature. Other factors that may affect cerebral ... and intracranial pressure are head position, jugular venous obstruction, and positive end-expiratory pressure

Eicosanoids mediate inflammation in a variety of ways. Of the following statements, which are true with regard to this? a. Eicosanoids are stored in cytoplasmic granules for release after receptor mediated signaling b. Eicosanoids include prostaglandins, thromboxanes, leukotrienes and lipoxins c. Eicosanoids generally have a plasma half-life measured in hours d. Physiologic responses to eicosanoids include vasodilatation, vasoconstriction, increased vascular permeability and both chemotaxis and chemoattractant inhibition

Description : Eicosanoids mediate inflammation in a variety of ways. Of the following statements, which are true with regard to this? a. Eicosanoids are stored in cytoplasmic granules ... include vasodilatation, vasoconstriction, increased vascular permeability and both chemotaxis and chemoattractant inhibition

Last Answer : Answer: b, d The eicosanoids are derived from arachidonic acid (eicosatetraenoic acid) and consist of prostaglandins, thromboxanes, leukotrienes and lipoxins. The eicosanoids are not ... nervous system d. Mononuclear phagocytes release a variety of proinflammatory cytokines and growth factors

With regard to cerebral autoregulation: a. cerebral blood flow is constant over a diastolic blood pressure of 60 to 140 mmHg b. autoregulation is lost during the acute phase of subarachnoid haemorrhage c. it is impaired in hypercapnia d. it is impaired in hypoxia

Description : With regard to cerebral autoregulation: a. cerebral blood flow is constant over a diastolic blood pressure of 60 to 140 mmHg b. autoregulation is lost during the acute phase of subarachnoid haemorrhage c. it is impaired in hypercapnia d. it is impaired in hypoxia

Last Answer : it is impaired in hypoxia

Increased intracranial pressure causes: a. sixth nerve palsy b. cupping of the optic disc c. absent venous pulsation d. increased cerebral blood flow

Description : Increased intracranial pressure causes: a. sixth nerve palsy b. cupping of the optic disc c. absent venous pulsation d. increased cerebral blood flow

Last Answer : absent venous pulsation

Antidiuretic hormone (ADH) - (1) inhibits the secretion of growth hormone by the pituitary (2) inhibits the rate of heart beat (3) causes the muscular walls of the arterioles to contract that simulates the reabsorption of water from the kidney tubules (4) causes an increase in the blood pressure

Description : Antidiuretic hormone (ADH) - (1) inhibits the secretion of growth hormone by the pituitary (2) inhibits the rate of heart beat (3) causes the muscular walls of the arterioles to contract that simulates the reabsorption of water from the kidney tubules (4) causes an increase in the blood pressure

Last Answer : (3) causes the muscular walls of the arterioles to contract that simulates the reabsorption of water from the kidney tubules

Thiopental (sodium thiopental, Thiopentone, STP) characterized by the following except A. Prepares as a pale yellow 10.5 (alkaline) B. After iv bolus, rapidly ... C) Effects include decrease cerebral blood flow and O2 requirements D) Has good analgesic ...

Description : Thiopental (sodium thiopental, Thiopentone, STP) characterized by the following except A. Prepares as a pale yellow 10.5 (alkaline) B. After iv bolus, rapidly ... C) Effects include decrease cerebral blood flow and O2 requirements D) Has good analgesic ...

Last Answer : Ans: D

The effect of sympathetic nervous system include: a. contraction of the bladder detrusor muscle b pupillary dilatationc. reduced gastrointestinal motility d. constricts bronchiole smooth muscle

Description : The effect of sympathetic nervous system include: a. contraction of the bladder detrusor muscle b pupillary dilatation c. reduced gastrointestinal motility d. constricts bronchiole smooth muscle

Last Answer : pupillary dilatation

The effect of sympathetic nervous system include: a. contraction of the bladder detrusor muscle b pupillary dilatation c. reduced gastrointestinal motility d. constricts bronchiole smooth muscle

Description : The effect of sympathetic nervous system include: a. contraction of the bladder detrusor muscle b pupillary dilatation c. reduced gastrointestinal motility d. constricts bronchiole smooth muscle

Last Answer : reduced gastrointestinal motility

Which of the following vasoactive drugs used in treating shock results in reduced preload and afterload, reducing oxygen demand of the heart? a) Nitroprusside (Nipride) A disadvantage of nitroprusside is that it causes hypotension. b) Dopamine (Intropin) Dopamine improves contractility, increases stroke volume, and increases cardiac output. c) Epinephrine (adrenaline) Epinephrine improves contractility, increases stroke volume, and increases cardiac output. d) Methoxamine (Vasoxyl) Methoxamine increases blood pressure by vasoconstriction.

Description : Which of the following vasoactive drugs used in treating shock results in reduced preload and afterload, reducing oxygen demand of the heart? a) Nitroprusside (Nipride) A disadvantage ... increases cardiac output. d) Methoxamine (Vasoxyl) Methoxamine increases blood pressure by vasoconstriction.

Last Answer : a) Nitroprusside (Nipride) A disadvantage of nitroprusside is that it causes hypotension.

Angiotensin II causes rise in blood pressure by: A. Direct vasoconstriction B. Releasing adrenaline from adrenal medulla C. Increasing central sympathetic tone D. All of the above

Description : Angiotensin II causes rise in blood pressure by: A. Direct vasoconstriction B. Releasing adrenaline from adrenal medulla C. Increasing central sympathetic tone D. All of the above

Last Answer : D. All of the above

Which of the following statement(s) is/are true concerning the physiology of the microvascular system? a. Filtration of capillary fluid into the interstitial and the subsequent reabsorption is influenced by Starling’s law of ultrafiltration b. The most important variable controlling blood to a capillary bed is the length of the vessel c. Most of the resistance to systemic blood flow occurs at the arteriolar level d. Adrenergic vasoconstriction can arrest blood flow to an entire capillary bed

Description : Which of the following statement(s) is/are true concerning the physiology of the microvascular system? a. Filtration of capillary fluid into the interstitial and the subsequent reabsorption is ... the arteriolar level d. Adrenergic vasoconstriction can arrest blood flow to an entire capillary bed

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Choose the correct statement about the action of nitrates on coronary vessels (a) They mitigate angina pectoris by increasing total coronary flow (b) They preferentially dilate conducting arteries without affecting resistance arterioles (c) They preferentially dilate autoregulatory arterioles without affecting the larger arteries (d) They increase subepicardial blood flow without affecting subendocardial blood flow

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Last Answer : Ans: B

A drug which preferentially dilates autoregulatory coronary arterioles with little effect on large conducting vessels is likely to: A. Evoke coronary steal phenomenon B. Mitigate classical angina but not variant angina C. Decrease total coronary blood flow in healthy subjects D. Avert ECG changes of ischaemia

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Choose the correct statement about the action of nitrates on coronary vessels: A. They mitigate angina pectoris by increasing total coronary flow B. They preferentially dilate conducting arteries without affecting resistance arterioles C. They preferentially dilate autoregulatory arterioles without affecting the larger arteries D. They increase subepicardial blood flow without affecting subendocardial blood flow

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Last Answer : B. They preferentially dilate conducting arteries without affecting resistance arterioles

With regard to cerebral blood flow: a. is dependent on the intracranial pressure b. is increased by hypoxia c. is reduced by hypercapnia d. is increased by hypothermia

Description : With regard to cerebral blood flow: a. is dependent on the intracranial pressure b. is increased by hypoxia c. is reduced by hypercapnia d. is increased by hypothermia

Last Answer : is increased by hypoxia

Which pituitary hormone is responsible for enhancing the arterial blood pressure by causing the narrowing of arterioles ?

Description : Which pituitary hormone is responsible for enhancing the arterial blood pressure by causing the narrowing of arterioles ?

Last Answer : Which pituitary hormone is responsible for enhancing the arterial blood pressure by causing the narrowing of ... ACTH B. Somatotropin C. ADH D. LTH

Ketamine; all are true except A. Induction of anesthesia by IV route B. Induction of anesthesia … C. Supplementation of sedation... D. Decrease cerebral blood flow

Description : Ketamine; all are true except A. Induction of anesthesia by IV route B. Induction of anesthesia … C. Supplementation of sedation... D. Decrease cerebral blood flow

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The following are true about micro-circulation: a. arterioles have no muscle b. capillaries have walls made up of a single layer of cells c. capillaries have no innervation d. the capillaries contain 5% of the total blood volume at any one time

Description : The following are true about micro-circulation: a. arterioles have no muscle b. capillaries have walls made up of a single layer of cells c. capillaries have no innervation d. the capillaries contain 5% of the total blood volume at any one time

Last Answer : he capillaries contain 5% of the total blood volume at any one time

Agents that often cause vasoconstriction include all of the following except (a) Angiotensin II (b) Methysergide (c) PGF2a (d) Prostacyclin (e) Thromboxane

Description : Agents that often cause vasoconstriction include all of the following except (a) Angiotensin II (b) Methysergide (c) PGF2a (d) Prostacyclin (e) Thromboxane

Last Answer : Ans: D

The vasopressin action(s) mediated by V2 receptors include(s): A. Increased water permeability of collecting duct cells B. Increased urea permeability of collecting duct cells C. Vasoconstriction D. Both 'A' and 'B

Description : The vasopressin action(s) mediated by V2 receptors include(s): A. Increased water permeability of collecting duct cells B. Increased urea permeability of collecting duct cells C. Vasoconstriction D. Both 'A' and 'B

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Beneficial effects of β-adrenoceptor blockers in CHF include the following except: A. Antagonism of ventricular wall stress enhancing action of sympathetic overactivity B. Antagonism of vasoconstriction due to sympathetic overactivity C. Prevention of pathological remodeling of ventricular myocardium D. Prevention of dangerous cardiac arrhythmias

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Actions of oxytocin include the following except: A. Vasoconstriction B. Increased water reabsorption in renal collecting ducts C. Contraction of mammary myoepithelium D. Release of prostaglandins from endometrium

Description : Actions of oxytocin include the following except: A. Vasoconstriction B. Increased water reabsorption in renal collecting ducts C. Contraction of mammary myoepithelium D. Release of prostaglandins from endometrium

Last Answer : A. Vasoconstriction

The prostanoid that consistently constricts blood vessels is (a) Prostaglandin E2 (b) Prostaglandin F2a (c) Thromboxane A2 (d) Prostacyclin

Description : The prostanoid that consistently constricts blood vessels is (a) Prostaglandin E2 (b) Prostaglandin F2a (c) Thromboxane A2 (d) Prostacyclin

Last Answer : Ans: C

Insulin - (1) increases blood sugar (2) decreases blood sugar (3) constricts blood vessels (4) stimulates lactation

Description : Insulin - (1) increases blood sugar (2) decreases blood sugar (3) constricts blood vessels (4) stimulates lactation

Last Answer : (2) decreases blood sugar Explanation: Insulin is central to regulating carbohydrate and fat metabolism in the body. It stops the use of fat as an energy source by inhibiting the release of glucagon. It removes excess glucose from the blood, which otherwise would be toxic.

The prostanoid that consistently constricts blood vessels is: A. Prostaglandin E2 B. Prostaglandin F2α C. Thromboxane A2 D. Prostacyclin

Description : The prostanoid that consistently constricts blood vessels is: A. Prostaglandin E2 B. Prostaglandin F2α C. Thromboxane A2 D. Prostacyclin

Last Answer : C. Thromboxane

Insulin : (1) increases blood sugar (2) decreases blood sugar (3) constricts blood vessels (4) stimulates lactation

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Which of the following nursing interventions is appropriate when caring for the awake and oriented head injury patient? a) Supply oxygen therapy to keep blood gas values within normal range. The goal is to keep blood gas values within normal range to ensure adequate cerebral circulation.

Description : Which of the following nursing interventions is appropriate when caring for the awake and oriented head injury patient? a) Supply oxygen therapy to keep blood gas values within normal range. ... rails and application of mitts are the appropriate interventions in the agitated head-injured patient.

Last Answer : a) Supply oxygen therapy to keep blood gas values within normal range. The goal is to keep blood gas values within normal range to ensure adequate cerebral circulation.

True statements about the retinal blood flow include: a. the retina receives 5% of total ocular blood flow b. the retinal blood flow is mainly under the sympathetic control c. the retina blood vessels are impermeable to ascorbate d. the pericytes control the contractile activity of the retinal blood vessels

Description : True statements about the retinal blood flow include: a. the retina receives 5% of total ocular blood flow b. the retinal blood flow is mainly under the sympathetic control c. the ... are impermeable to ascorbate d. the pericytes control the contractile activity of the retinal blood vessels

Last Answer : the pericytes control the contractile activity of the retinal blood vessels

The cerebral blood flow: a. is increased by hypercapnia b. is increased by hypoxia c. accounts for 15% of the total cardiac output d. all above

Description : The cerebral blood flow: a. is increased by hypercapnia b. is increased by hypoxia c. accounts for 15% of the total cardiac output d. all above

Last Answer : all above

Cerebral blood flow is increase in: a. chronic anaemia b. inhalation of 5% carbon dioxide c. seizures d. inhalation of hyperbaric oxygen

Description : Cerebral blood flow is increase in: a. chronic anaemia b. inhalation of 5% carbon dioxide c. seizures d. inhalation of hyperbaric oxygen

Last Answer : chronic anaemia

Which blood vessels have the smallest diameter? (1) Capillaries (2) Arterioles (3) Venules (4) Lymphatic

Description : Which blood vessels have the smallest diameter? (1) Capillaries (2) Arterioles (3) Venules (4) Lymphatic

Last Answer : (1) Capillaries Explanation: Blood is carried through the body by Blood Vessels. With the help of perfusion process capillaries supplies blood to the tissues.

Laboratory monitoring of coagulation and anticoagulation includes testing of platelet function. Which of the following statements is/are true concerning tests of platelet function? a. A platelet count of 50,000/µL or more usually ensures hemostasis b. Bleeding time assays assessibility of platelets to perform hemostatic plugs and is determined from a sample of blood drawn in an EDTA coated test tube c. Aspirin therapy can be associated with a bleeding time in the range of 8–15 minutes d. Tests of platelet aggregation should be part of the standard preoperative evaluation of patients using aspirin

Description : Laboratory monitoring of coagulation and anticoagulation includes testing of platelet function. Which of the following statements is/are true concerning tests of platelet function? a. A ... platelet aggregation should be part of the standard preoperative evaluation of patients using aspirin

Last Answer : Answer: a, c Tests of platelet function include peripheral platelet counts, bleeding times, and platelet aggregation. Usually, a platelet count of 50,000/mL or more ensures adequate hemostasis ... is not available in most laboratories, probably because of the observer-dependent nature of the test

Vasoconstriction causes

Description : Vasoconstriction causes

Last Answer : Vasoconstriction causes A. Increase in heart beat B. Decrease in heart beat C. Increase in blood pressure D. Decrease in blood pressure

Histamine causes all the following except (A) Stimulation of gastric secretion (B) Vasoconstriction (C) Pruritus (D) Increase in capillary permeability

Description : Histamine causes all the following except (A) Stimulation of gastric secretion (B) Vasoconstriction (C) Pruritus (D) Increase in capillary permeability

Last Answer : Answer : B

Which of the following would help in prevention of diuresis? (a) More water reabsorption due to undersecretion of ADH. (b) Reabsorption of Na+ and water from renal tubules due to aldosterone. (c) Atrial natriuretic factor causes vasoconstriction. (d) Decrease in secretion of renin by JG cells. (NEE

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Last Answer : (b) Reabsorption of Na+ and water from renal tubules due to aldosterone.

A person suffering from carbon monoxide poisoning a) appears intoxicated. A person suffering from carbon monoxide poisoning appears intoxicated (from cerebral hypoxia). Other signs and symptoms include headache, muscular weakness, palpitation, dizziness, and mental confusion.

Description : A person suffering from carbon monoxide poisoning a) appears intoxicated. A person suffering from carbon monoxide poisoning appears intoxicated (from cerebral hypoxia). Other signs and symptoms include headache, ... pink to cherry red to cynanotic and pale and is not a reliable diagnostic sign.

Last Answer : a) appears intoxicated. A person suffering from carbon monoxide poisoning appears intoxicated (from cerebral hypoxia). Other signs and symptoms include headache, muscular weakness, palpitation, dizziness, and mental confusion.

The nurse assesses subtle personality changes, restlessness, irritability, and confusion in a patient who has sustained a fracture. The nurse suspects a) fat embolism syndrome. Cerebral disturbances in the patient with fat embolism syndrome include subtle personality changes, restlessness, irritability, and confusion.

Description : The nurse assesses subtle personality changes, restlessness, irritability, and confusion in a patient who has sustained a fracture. The nurse suspects a) fat embolism syndrome. Cerebral disturbances in ... severe, burning pain, local edema, hyperesthesia, muscle spasms, and vasomotor skin changes.

Last Answer : a) fat embolism syndrome. Cerebral disturbances in the patient with fat embolism syndrome include subtle personality changes, restlessness, irritability, and confusion.

Clinical applications of quinine include the following except: A. Uncomplicated chloroquine resistant malaria B. Cerebral malaria C. To induce abortion D. Nocturnal leg cramps

Description : Clinical applications of quinine include the following except: A. Uncomplicated chloroquine resistant malaria B. Cerebral malaria C. To induce abortion D. Nocturnal leg cramps

Last Answer : C. To induce abortion

If Wilson Sporting Goods faces the classic demand curve characteristic for most products, as it raises the price of its tennis rackets, the: A)quantity demand goes down. B)demand remains constant. C)quantity demands increases.

Description : If Wilson Sporting Goods faces the classic demand curve characteristic for most products, as it raises the price of its tennis rackets, the: A)quantity demand goes down. B)demand remains constant. C)quantity demands increases.

Last Answer : A)quantity demand goes down.

A classic sign of cardiogenic shock is a) Tissue hypoperfusion Tissue hypoperfusion is manifested as cerebral hypoxia (restlessness, confusion, agitation). b) High blood pressure Low blood pressure is a classic sign of cardiogenic shock. c) Hyperactive bowel sounds Hypoactive bowel sounds are classic signs of cardiogenic shock. d) Increased urinary output Decreased urinary output is a classic sign of cardiogenic shock.

Description : A classic sign of cardiogenic shock is a) Tissue hypoperfusion Tissue hypoperfusion is manifested as cerebral hypoxia (restlessness, confusion, agitation). b) High blood pressure Low blood pressure is ... . d) Increased urinary output Decreased urinary output is a classic sign of cardiogenic shock.

Last Answer : a) Tissue hypoperfusion Tissue hypoperfusion is manifested as cerebral hypoxia (restlessness, confusion, agitation).

A semiconscious patient of haemorrhagic cerebral stroke has been brought to the emergency. His blood pressure is 240/120 mmHg. Select the procedure to lower his blood pressure as rapidly as possible: A. Sublingual nifedipine B. Intramuscular injection of hydralazine C. Intravenous infusion of sodium nitroprusside D. Intravenous injection of clonidin

Description : A semiconscious patient of haemorrhagic cerebral stroke has been brought to the emergency. His blood pressure is 240/120 mmHg. Select the procedure to lower his blood pressure as ... injection of hydralazine C. Intravenous infusion of sodium nitroprusside D. Intravenous injection of clonidin

Last Answer : C. Intravenous infusion of sodium nitroprussid

In the genetic disorder of cystinuria, the patient excretes large quantities of cystine in their urine and its low solubility causes crystalline cystine to precipitate as stones in kidneys. The remedy involves ingesting Na HCO3. Reaction of this treatment is (A) NaHCO2 combines with cystine (B) NaHCO3 raises the pH above the isoelectric point of cystine (C) NaHCO3 prevents stone formation by hydrolysis of cystine to cysteine (D) None of these

Description : In the genetic disorder of cystinuria, the patient excretes large quantities of cystine in their urine and its low solubility causes crystalline cystine to precipitate as stones in kidneys. The remedy ... C) NaHCO3 prevents stone formation by hydrolysis of cystine to cysteine (D) None of these

Last Answer : Answer : C

“Crowding out” means that a. a government budget deficit lowers interest rates and causes investment spending to rise b. an increase in marginal tax rates lowers production c. a government budget deficit raises interest rates and causes investment spending to fall d. a government budget deficit raises American exports and lowers American imports

Description : Crowding out means that a. a government budget deficit lowers interest rates and causes investment spending to rise b. an increase in marginal tax rates lowers production c. a government ... spending to fall d. a government budget deficit raises American exports and lowers American imports

Last Answer : c. a government budget deficit raises interest rates and causes investment spending to fall

10. “Crowding out” means that a. a government budget deficit lowers interest rates and causes investment spending to rise b. an increase in marginal tax rates lowers production c. a government budget deficit raises interest rates and causes investment spending to fall d. a government budget deficit raises American exports and lowers American imports

Description : 10. Crowding out means that a. a government budget deficit lowers interest rates and causes investment spending to rise b. an increase in marginal tax rates lowers production c. a ... investment spending to fall d. a government budget deficit raises American exports and lowers American imports

Last Answer : c. a government budget deficit raises interest rates and causes investment spending to fall

Which of the following statement(s) is/are correct concerning the cardiovascular response to shock? a. Changes in cardiac contractile function shift the Frank Starling curve up and down b. Venoconstriction from skeletal muscle is a significant contributor to the restoration of blood volume with shock c. Arterial vasoconstriction affects all vascular beds equally d. The total circulating blood volume is equally split between the arterial and venous system

Description : Which of the following statement(s) is/are correct concerning the cardiovascular response to shock? a. Changes in cardiac contractile function shift the Frank Starling curve up and down b. ... d. The total circulating blood volume is equally split between the arterial and venous system

Last Answer : Answer: a Central in the general cardiovascular response to shock is the action of the heart itself. The principle determinants of cardiac function in the normal heart are the volume of blood ... Blood flow to the skin is sacrificed early, followed by that to the kidneys and splanchnic viscera