Doctors use stethoscope to hear the sounds produced during each cardiac cycle. The second sound is heard when(a) AV node receives signal from SA node (b) AV valves open up (c) Ventricular walls vibrate due to gushing in of blood from atria (d) Semilunar valves close down after the blood flows into vessels from ventricles.

Doctors use stethoscope to hear the sounds
produced during each cardiac cycle. The second
sound is heard when
(a) AV node receives signal from SA node
(b) AV valves open up
(c) Ventricular walls vibrate due to gushing in of
blood from atria
(d) Semilunar valves close down after the blood
flows into vessels from ventricles.
by

1 Answer

Answer :

(d) Semilunar valves close down after the blood
flows into vessels from ventricles
by

Related questions

Which of the following ECG waveforms characterizes conduction of an electrical impulse through the left ventricle? a) QRS complex The QRS complex represents ventricular depolarization b) P wave The P wave is an ECG characteristic reflecting conduction of an electrical impulse through the atria. c) PR interval The PR interval is a component of an ECG tracing reflecting conduction of an electrical impulse through the AV node. d) QT interval The QT interval is an ECG characteristic reflecting the time from ventricular depolarization to repolarization.

Description : Which of the following ECG waveforms characterizes conduction of an electrical impulse through the left ventricle? a) QRS complex The QRS complex represents ventricular depolarization b) P ... QT interval is an ECG characteristic reflecting the time from ventricular depolarization to repolarization.

Last Answer : a) QRS complex The QRS complex represents ventricular depolarization

Which of the following ECG characteristics is usually seen when a patient’s serum potassium level is low? a) U wave The U wave is an ECG waveform characteristic that may reflect Purkinje fiber repolarization. It is usually seen when a patient’s serum potassium level is low. b) T wave The T wave is an ECG characteristic reflecting repolarization of the ventricles. It may become tall or “peaked” if a patient’s serum potassium level is high. c) P wave The P wave is an ECG characteristic reflecting conduction of an electrical impulse through the atria. d) QT interval The QT interval is an ECG characteristic reflecting the time from ventricular depolarization to repolarization.

Description : Which of the following ECG characteristics is usually seen when a patient's serum potassium level is low? a) U wave The U wave is an ECG waveform characteristic that may ... interval The QT interval is an ECG characteristic reflecting the time from ventricular depolarization to repolarization.

Last Answer : a) U wave The U wave is an ECG waveform characteristic that may reflect Purkinje fiber repolarization. It is usually seen when a patient’s serum potassium level is low.

Impulse of heart beat originates from (a) SA node (b) AV node (c) vagus nerve (d) cardiac nerve

Description : Impulse of heart beat originates from (a) SA node (b) AV node (c) vagus nerve (d) cardiac nerve

Last Answer : (a) SA node

Assertion `:` First heart sound (LUBB) is produced at the beginning fo ventricular systole stage. Reason `:` During ventricular systole semilunar valv

Description : Assertion `:` First heart sound (LUBB) is produced at the beginning fo ventricular systole stage. Reason `:` During ventricular systole semilunar valv

Last Answer : Assertion `:` First heart sound (LUBB) is produced at the beginning fo ventricular systole stage. Reason ... D. If both Assertion & Reason are false.

Assertion `:` During diastole, ventricles receives blood from auricles. Reason `:` During ventricular diastole (stage of rapid inflow) the pressure in

Description : Assertion `:` During diastole, ventricles receives blood from auricles. Reason `:` During ventricular diastole (stage of rapid inflow) the pressure in

Last Answer : Assertion `:` During diastole, ventricles receives blood from auricles. Reason `:` During ventricular ... . If both Assertion & Reason are false.

Digitalis induced increase in refractory period of myocardial fibres is most consistent and pronounced in the: A. Atria B. Ventricles C. A-V node D. Purkinje fibres

Description : Digitalis induced increase in refractory period of myocardial fibres is most consistent and pronounced in the: A. Atria B. Ventricles C. A-V node D. Purkinje fibres

Last Answer : C. A-V node

A long-term effect of which of the following procedures post acute MI induces angioneogenesis? a) Transmyocardial laser revascularization TNR procedures usually involves making 20 to 40 channels in ventricular muscle. It is thought that some blood flows into the channels, decreasing the ischemia directly. Within the next few days to months, the channels close as a result of the body’s inflammatory process of healing a wound and new blood vessels form as a result of the inflammatory process.

Description : A long-term effect of which of the following procedures post acute MI induces angioneogenesis? a) Transmyocardial laser revascularization TNR procedures usually involves making 20 to 40 channels in ventricular muscle. ... e.g., clopidigrel [Plavix]) therapy for 2 weeks and lifetime use of aspirin).

Last Answer : a) Transmyocardial laser revascularization TNR procedures usually involves making 20 to 40 channels in ventricular muscle. It is thought that some blood flows into the channels, decreasing the ischemia directly. ... healing a wound and new blood vessels form as a result of the inflammatory process.

What would be the heart rate of a person if the cardiac output is 5 L, blood volume in the ventricles at the end of diastole is 100 mL and at the end of ventricular systole is 50 mL ? (a) 125 beats per minute (b) 50 beats per minute (c) 75 beats per minute (d) 100 beats per minute

Description : What would be the heart rate of a person if the cardiac output is 5 L, blood volume in the ventricles at the end of diastole is 100 mL and at the end of ventricular systole is 50 mL ? (a) 125 beats per minute (b) 50 beats per minute (c) 75 beats per minute (d) 100 beats per minute

Last Answer : (d) 100 beats per minute

The correct route through which pulse-making impulse travels in the heart is (a) SA node → Purkinje fibres → bundle of His → AV node → heart muscles (b) SA node → AV node → bundle of His → Purkinje fibres → heart muscles(c) AV node → bundle of His → SA node → Purkinje fibres → heart muscles (d) AV node → SA node → Purkinje fibres → bundle of His → heart muscles.

Description : The correct route through which pulse-making impulse travels in the heart is (a) SA node → Purkinje fibres → bundle of His → AV node → heart muscles (b) SA node → AV node → bundle of His → Purkinje ... fibres → heart muscles (d) AV node → SA node → Purkinje fibres → bundle of His → heart muscles.

Last Answer : (b) SA node → AV node → bundle of His → Purkinje fibres → heart muscles

Rate of heart beat is determined by (a) Purkinje fibres (b) papillary muscles (c) AV node (d) SA node.

Description : Rate of heart beat is determined by (a) Purkinje fibres (b) papillary muscles (c) AV node (d) SA node.

Last Answer : (d) SA node.

The secondary pacemaker of the heart is known as the: a) AV node b) SA node c) Purkinje Bundle d) None of the above

Description : The secondary pacemaker of the heart is known as the: a) AV node b) SA node c) Purkinje Bundle d) None of the above

Last Answer : ANSWER: A -- AV node

In a standard ECG which one of the following alphabets is the correct representation of the respective activity of the human heart? (a) S - start of systole (b) T - end of diastole (c) P - depolarisation of the atria (d) R - repolarisation of ventricles

Description : In a standard ECG which one of the following alphabets is the correct representation of the respective activity of the human heart? (a) S - start of systole (b) T - end of diastole (c) P - depolarisation of the atria (d) R - repolarisation of ventricles

Last Answer : (c) P - depolarisation of the atria

Match the column - I with column - II. Column-I Column-II (A) P-wave (i) Depolarisation of ventricles (B) QRS complex (ii) Repolarisation of ventricles (C) T-wave (iii) Coronary ischaemia (D) Reduction in the size of T- wave (iv) Depolarisation of atria (v) Repolarisation of atria Select the correct option. (A) (B) (C) (D) (a) (ii) (iii) (v) (iv) (b) (iv) (i) (ii) (iii) (c) (iv) (i) (ii) (v) (d) (ii) (i) (v) (iii)

Description : Match the column - I with column - II. Column-I Column-II (A) P-wave (i) Depolarisation of ventricles (B) QRS complex (ii) Repolarisation of ventricles (C) T-wave (iii) Coronary ischaemia (D) Reduction in the size of T- wave (iv) ... ) (i) (ii) (iii) (c) (iv) (i) (ii) (v) (d) (ii) (i) (v) (iii)

Last Answer : (b) (iv) (i) (ii) (iii)

What is the stage of the cardiac cycle during which the ventricles are filled?

Description : What is the stage of the cardiac cycle during which the ventricles are filled?

Last Answer : The filling of the ventricles with blood occurs during diastole. The Circulatory System - Image Diversity: cardiac cycle

The antianginal effect of propranolol may be attributed to which one of the following (a) Block of exercise – induced tachycardia (b) Decreased end – diastolic ventricular volume (c) Dilation of consticted coronary vessels (d) Increased cardiac force (e) Increased resting heart rate

Description : The antianginal effect of propranolol may be attributed to which one of the following (a) Block of exercise – induced tachycardia (b) Decreased end – diastolic ventricular volume (c) Dilation of consticted coronary vessels (d) Increased cardiac force (e) Increased resting heart rate

Last Answer : Ans: A

In humans, blood passes from the post caval to the diastolic right atrium of heart due to (a) stimulation of the sino auricular node (b) pressure difference between the post caval and atrium (c) pushing open of the venous valves (d) suction pull.

Description : In humans, blood passes from the post caval to the diastolic right atrium of heart due to (a) stimulation of the sino auricular node (b) pressure difference between the post caval and atrium (c) pushing open of the venous valves (d) suction pull.

Last Answer : (b) pressure difference between the post caval and atrium

The diagram given here is the standard ECG of a normal person. The P-wave represents the (a) beginning of the systole (b) end of systole (c) contraction of both the atria (d) initiation of the ventricular contraction.

Description : The diagram given here is the standard ECG of a normal person. The P-wave represents the (a) beginning of the systole (b) end of systole (c) contraction of both the atria (d) initiation of the ventricular contraction.

Last Answer : (c) contraction of both the atria

The following are true about cardiac contraction: a. the P wave initiates the atrial contraction b. atrial contribution to ventricular filling is most effective at fast heart rate. c. b wave is generated by atrial contraction d. fourth heart sound occurs during atrial contraction

Description : The following are true about cardiac contraction: a. the P wave initiates the atrial contraction b. atrial contribution to ventricular filling is most effective at fast heart rate. c. b wave is generated by atrial contraction d. fourth heart sound occurs during atrial contraction

Last Answer : fourth heart sound occurs during atrial contraction

The cardiac pacemaker in a patient fails to function normally. The doctors find that an artificial pacemaker is to be grafted in him. It is likely that it will be grafted at the site of (a) atrioventricular bundle (b) Purkinje system (c) sinoatrial node (d) atrioventricular node.

Description : The cardiac pacemaker in a patient fails to function normally. The doctors find that an artificial pacemaker is to be grafted in him. It is likely that it will be grafted at the site of (a) atrioventricular bundle (b) Purkinje system (c) sinoatrial node (d) atrioventricular node.

Last Answer : (b) Purkinje system

In cardiac cycle, "Dup" sound is heard when

Description : In cardiac cycle, "Dup" sound is heard when

Last Answer : In cardiac cycle, "Dup" sound is heard when A. Mittral valves close B. Mittral valves open C. Semilunar valves close D. Tricuspid valve close

Two sources of sound placed close to each other, are emitting progressive waves given by y1 = 4 sin 600 t and y2 = 5 sin 608 t. An observer located near these two sources of sound will hear: (1) 4 beats per second with intensity ratio 81 : 1 between waxing and waning (2) 4 beats per second with intensity ratio 25 : 16 between waxing and waning (3) 8 beats per second with intensity ratio 25 : 16 between waxing and waning (4) 8 beats per second with intensity ratio 81 : 1 between waxing and waning

Description : Two sources of sound placed close to each other, are emitting progressive waves given by y1 = 4 sin 600 t and y2 = 5 sin 608 t. An observer located near these two sources of sound will ... between waxing and waning (4) 8 beats per second with intensity ratio 81 : 1 between waxing and waning

Last Answer : (1) 4 beats per second with intensity ratio 81 : 1 between waxing and waning

Assertion `:` Though AV node generates impulses, it is still not called as the pacemaker of heart. Reason `:` The rythmicity of impulse production is

Description : Assertion `:` Though AV node generates impulses, it is still not called as the pacemaker of heart. Reason `:` The rythmicity of impulse production is

Last Answer : Assertion `:` Though AV node generates impulses, it is still not called as the pacemaker of heart. ... . D. If both Assertion & Reason are false.

What structures transmit the heart impulse from the av node to the ventricle?

Description : What structures transmit the heart impulse from the av node to the ventricle?

Last Answer : Bundle of Hisatrioventicular bundle (bundle of his), right and left bundle bramches and the purkinge conducition fibers

Which of the following terms is used to describe a tachycardia characterized by abrupt onset, abrupt cessation, and a QRS of normal duration? a) Paroxysmal atrial tachycardia PAT is often caused by a conduction problem in the AV node and is now called AV nodal reentry tachycardia. b) Sinus tachycardia Sinus tachycardia occurs when the sinus node regularly creates an impulse at a faster-than-normal rate. c) Atrial flutter Atrial flutter occurs in the atrium and creates an atrial rate between 250-400 times per minute. d) Atrial fibrillation Atrial fibrillation causes a rapid, disorganized, and uncoordinated twitching of atrial musculature.

Description : Which of the following terms is used to describe a tachycardia characterized by abrupt onset, abrupt cessation, and a QRS of normal duration? a) Paroxysmal atrial tachycardia PAT ... fibrillation Atrial fibrillation causes a rapid, disorganized, and uncoordinated twitching of atrial musculature.

Last Answer : a) Paroxysmal atrial tachycardia PAT is often caused by a conduction problem in the AV node and is now called AV nodal reentry tachycardia.

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

Description : 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 ... Prevention of pathological remodeling of ventricular myocardium D. Prevention of dangerous cardiac arrhythmias

Last Answer : B. Antagonism of vasoconstriction due to sympathetic overactivity

Central venous pressure is measured in which of the following heart chambers? a) Right atrium The pressure in the right atrium is used to assess right ventricular function and venous blood return to the heart. b) Left atrium The left atrium receives oxygenated blood from the pulmonary circulation. c) Left ventricle The left ventricle receives oxygenated blood from the left atrium. d) Right ventricle The right ventricle is not the central collecting chamber of venous circulation.

Description : Central venous pressure is measured in which of the following heart chambers? a) Right atrium The pressure in the right atrium is used to assess right ventricular function and venous blood return ... d) Right ventricle The right ventricle is not the central collecting chamber of venous circulation.

Last Answer : a) Right atrium The pressure in the right atrium is used to assess right ventricular function and venous blood return to the heart.

Intravenous furosemide promptly mitigates dyspnoea in acute left ventricular failure by: A. Producing bronchodilatation B. Causing rapid diuresis and reducing circulating blood volume C. Increasing venous capacitance and reducing cardiac preload. D. Stimulating left ventricular contractility

Description : Intravenous furosemide promptly mitigates dyspnoea in acute left ventricular failure by: A. Producing bronchodilatation B. Causing rapid diuresis and reducing circulating blood volume C. Increasing venous capacitance and reducing cardiac preload. D. Stimulating left ventricular contractility

Last Answer : C. Increasing venous capacitance and reducing cardiac preload.

Morphine affords symptomatic relief of dyspnoea in acute left ventricular failure by the following mechanisms except: A. Bronchodilatation B. Depression of respiratory centre C. Reduction in cardiac preload D. Shift of blood from pulmonary to systemic circuit

Description : Morphine affords symptomatic relief of dyspnoea in acute left ventricular failure by the following mechanisms except: A. Bronchodilatation B. Depression of respiratory centre C. Reduction in cardiac preload D. Shift of blood from pulmonary to systemic circuit

Last Answer : A. Bronchodilatation

The cerebrospinal fluid: a. has a normal volume of 150 ml b. has a normal opening pressure of 7 - 18 cm H2O c. flows from the ventricles to the subarachnoid space via the foramen of Monrod. does not contain neutrophils in normal individuals

Description : The cerebrospinal fluid: a. has a normal volume of 150 ml b. has a normal opening pressure of 7 - 18 cm H2O c. flows from the ventricles to the subarachnoid space via the foramen of Monro d. does not contain neutrophils in normal individuals

Last Answer : has a normal volume of 150 m

Approximately, how many times each day do our heart valves open and close normally? A. 10,000 B. 1,00,000 C. 1,50,000 D. 2,00,000

Description : Approximately, how many times each day do our heart valves open and close normally? A. 10,000 B. 1,00,000 C. 1,50,000 D. 2,00,000

Last Answer : ANSWER: B

Approximately how many times each day, do our heart valves open and close normally? (1) 10,000 times (2) 1,00,000 times (3) 1,50,000 times (4) 2,00,000 times

Description : Approximately how many times each day, do our heart valves open and close normally? (1) 10,000 times (2) 1,00,000 times (3) 1,50,000 times (4) 2,00,000 times

Last Answer : (2) 1,00,000 times Explanation: The opening and closing of heart valves is known as a heartbeat. The average human heart beats 100,000 times per day.

Approximately, how many times each day do our heart valves open and close normally? A. 10,000 B. 1,00,000 (Answer) C. 1,50,000 D. 2,00,000

Description : Approximately, how many times each day do our heart valves open and close normally? A. 10,000 B. 1,00,000 (Answer) C. 1,50,000 D. 2,00,000

Last Answer : B. 1,00,000 (Answer)

Approximately how many times each day, do our heart valves open and close normally? (1) 10,000 times (2) 1,00,000 times (3) 1,50,000 times (4) 2,00,000 times

Description : Approximately how many times each day, do our heart valves open and close normally? (1) 10,000 times (2) 1,00,000 times (3) 1,50,000 times (4) 2,00,000 times

Last Answer :  1,00,000 times

Cerebrospinal fluid: a. is produced mainly by the lateral, third and fourth ventricles b. enters the subarachnoid space through foramina Lushka and Magendie c. is reabsorbed mainly into the lymphatics d. production is dependent of the blood pressure

Description : Cerebrospinal fluid: a. is produced mainly by the lateral, third and fourth ventricles b. enters the subarachnoid space through foramina Lushka and Magendie c. is reabsorbed mainly into the lymphatics d. production is dependent of the blood pressure

Last Answer : is produced mainly by the lateral, third and fourth ventricles

Bundle of His is a network of (a) muscle fibres distributed throughout the heart walls (b) muscle fibres found only in the ventricle wall (c) nerve fibres distributed in ventricles (d) nerve fibres found throughout the heart.

Description : Bundle of His is a network of (a) muscle fibres distributed throughout the heart walls (b) muscle fibres found only in the ventricle wall (c) nerve fibres distributed in ventricles (d) nerve fibres found throughout the heart.

Last Answer : (b) muscle fibres found only in the ventricle wall

Which blood vessels have valves in them?

Description : Which blood vessels have valves in them?

Last Answer : Veins

In the immediate post-operative period, the nurse assesses coarse, high-pitched sound on inspiration by listening over the trachea with a stethoscope. The nurse should immediately A. Position client to Fowler’s B. Reassure the client that he is doing fine C. Suction the tracheostomy tube D. Report to the surgeon

Description : In the immediate post-operative period, the nurse assesses coarse, high-pitched sound on inspiration by listening over the trachea with a stethoscope. The nurse should immediately A. Position client to ... the client that he is doing fine C. Suction the tracheostomy tube D. Report to the surgeon

Last Answer : Which of the following expected outcomes for the patient is most relevant for the nursing diagnosis “At risk for imbalanced nutrition related to impaired swallowing”? A. Appropriate body weight maintained B. Fear of choking relieved C. Oral intake increased D. Swallowing of soft foods facilitated

A crackling sound associated with myonecrosis is due to a. Respiratory Distress Due To Plague. b. Nerve Contractions Due To Tetanus. c. Lymph Node Swelling Due To Plague. d. Gas Produced By C. Perfringens.

Description : A crackling sound associated with myonecrosis is due to a. Respiratory Distress Due To Plague. b. Nerve Contractions Due To Tetanus. c. Lymph Node Swelling Due To Plague. d. Gas Produced By C. Perfringens.

Last Answer : d. Gas Produced By C. Perfringens.

With regard to the choroid: a. the choroid receives 85% of blood flow to the eye b. the blood vessels in the choroid contains tight junction c. the choroid vessels are embedded in a matrix made up of type III collagen d. in the presence of high partial pressure of carbon dioxide the choroidal vessels increase in diameter

Description : With regard to the choroid: a. the choroid receives 85% of blood flow to the eye b. the blood vessels in the choroid contains tight junction c. the choroid vessels are embedded in ... d. in the presence of high partial pressure of carbon dioxide the choroidal vessels increase in diameter

Last Answer : in the presence of high partial pressure of carbon dioxide the choroidal vessels increase in diameter

Difference between pulmonary artery and pulmonary vein is that, the pulmonary artery has (a) no endothelium (b) valves (c) thicker walls (d) oxygenated blood.

Description : Difference between pulmonary artery and pulmonary vein is that, the pulmonary artery has (a) no endothelium (b) valves (c) thicker walls (d) oxygenated blood.

Last Answer : (c) thicker walls

Which of the following statements does NOT apply to arteries when comparing them to veins: a) have thick walls b) carry blood away from heart c) highly elastic walls d) have valves.

Description : Which of the following statements does NOT apply to arteries when comparing them to veins: a) have thick walls b) carry blood away from heart c) highly elastic walls d) have valves.

Last Answer : ANSWER: D -- HAVE VALVES 

If a three-phase induction motor is operated under a light load and it develops an open in one of its supply lines, the motor will _____________. A. continue to run, but will vibrate and have reduced torque B. speed up due to the reduced number of poles C. run cooler due to reduced current flow D. stop

Description : If a three-phase induction motor is operated under a light load and it develops an open in one of its supply lines, the motor will _____________. A. continue to run, but will vibrate and have reduced ... speed up due to the reduced number of poles C. run cooler due to reduced current flow D. stop

Last Answer : Answer: A

The pacesetter in the heart is called (a) sino-atrial node (SAN) (b) atrio-ventricular node (AVN) (c) Purkinje fibres (d) papillary muscle.

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Last Answer : (b) atrio-ventricular node (AVN)

Where is an Air to close and Air to open control valves used ?

Description : Where is an Air to close and Air to open control valves used ?

Last Answer : Air to close: 1. Reflux lines. 2. Cooling water lines. 3. Safety Relief services. Air to open: 1. Feed lines. 2. Steam Service. 

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 following are true about iris: a. it receives 5% of total blood flow b. it contains blood vessels with radial coils c. it contains fenestration in the blood vessels d. the sympathetic activity in the iris dilator muscles is mainly mediated by receptors

Description : The following are true about iris: a. it receives 5% of total blood flow b. it contains blood vessels with radial coils c. it contains fenestration in the blood vessels d. the sympathetic activity in the iris dilator muscles is mainly mediated by receptors

Last Answer : it contains blood vessels with radial coils