Description : Select the tissue that is most sensitive to oxytocin: A. Myometrium B. Myoepithelium of mammary alveoli C. Vascular smooth muscle D. Renal collecting ducts
Last Answer : B. Myoepithelium of mammary alveoli
Description : Select the action of vasopressin exerted through the V1 subtype receptors: A. Release of coagulation factor VIII and von Willebrands factor from vascular endothelium B. Increased peristalsis of gut C. Dilatation of blood vessels D. Increased water permeability of renal collecting ducts
Last Answer : B. Increased peristalsis of gut
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
Description : Aldosterone increases Na+ reabsorption and K+ excretion in the renal collecting duct cells by: A. Inducing synthesis of Na+K+ATPase B. Inducing synthesis of amiloride sensitive Na+ channels C. Translocating Na+ channels from cytosolic site to luminal membrane D. All of the above
Last Answer : D. All of the above
Description : The opioid antidiarrhoeal drugs act by the following mechanism(s): A. They relax the intestinal smooth muscle B. They inhibit intestinal peristalsis C. They promote clearance of intestinal pathogens Aim4aiims.in D. All of the above
Last Answer : B. They inhibit intestinal peristalsis
Description : Angiotensin III is equipotent to angiotensin II in: A. Releasing aldosterone from adrenal cortex B. Promoting Na+ and water reabsorption by direct intrarenal action C. Causing vasoconstriction D. Contracting intestinal smooth muscle
Last Answer : A. Releasing aldosterone from adrenal cortex
Description : Which one of the following is not a part of a renal pyramid? (a) Peritubular capillaries (b) Convoluted tubules (c) Collecting ducts (d) Loop of Henle
Last Answer : (b) Convoluted tubules
Description : The following vasodilator(s) act(s) by opening K+ channels in the vascular smooth muscle: A. Dipyridamole B. Minoxidil C. Diazoxide D. Both ‘B’ and ‘C’
Last Answer : D. Both ‘B’ and ‘C
Description : Organic nitrates relax vascular smooth muscle by: A. Increasing intracellular cyclic GMP B. Increasing intracellular cyclic AMP C. Decreasing intracellular cyclic AMP D. Both ‘A’ and ‘C’ are correct
Last Answer : A. Increasing intracellular cyclic GMP
Description : Choose the correct statement about drotaverine: A. It is a smooth muscle antispasmodic acting by non-anticholinergic mechanisms B. It is a papaverine congener used in peripheral vascular diseases C. It ... used to control diarrhoea D. It is a M1/M3 selective antagonist used for spastic constipation
Last Answer : A. It is a smooth muscle antispasmodic acting by non-anticholinergic mechanisms
Description : Choose the correct statement about osmotic diuretics: A. They are large molecular weight substances which form colloidal solution B. Their primary site of action is collecting ducts in the ... C. They increase water excretion without increasing salt excretion D. They can lower intraocular pressure
Last Answer : D. They can lower intraocular pressure
Description : The following diuretic acts on the luminal membrane of distal tubule and collecting ducts to inhibit electrogenic Na+ reabsorption so that K+ excretion is diminished and bicarbonate excretion is enhanced: A. Xipamide B. Isosorbide C. Triamterene D. Spironolactone
Last Answer : C. Triamterene
Description : Amiloride inhibits K+ excretion in the distal tubules and collecting ducts by blocking: A. Electrogenic K+ channels B. Electrogenic Na+ channels C. Nonelectrogenic Na+-Cl– symport D. H+K+ATPase
Last Answer : B. Electrogenic Na+ channels
Description : The primary site of action of thiazide diuretics is: A. Proximal tubule B. Ascending limb of loop of Henle C. Cortical diluting segment D. Collecting ducts
Last Answer : C. Cortical diluting segment
Description : Secretion of K+ in the late distal tubule and collecting ducts of kidney depends on: A. Intracellular K+ content B. Unabsorbed Na+ load presented to the distal segment C. Aldosterone level D. All of the above
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
Last Answer : D. Both 'A' and 'B
Description : The following drug reduces urine volume in both pituitary origin as well as renal diabetes insipidus and is orally active: A. Vasopressin B. Hydrochlorothiazide C. Chlorpropamide D. Carbamazepine
Last Answer : B. Hydrochlorothiazide
Description : From the internal surface to the external surface, the digestive tube wall is made of mucosa (epithelial tissue responsible for the intestinal absorption), submucosa (connective tissue beneath the ... within the abdominal cavity. Digestion System - Image Diversity: histology of the digestive tube
Last Answer : What is the location of the salivary glands in humans?
Description : The primary mechanism by which antidiuretic hormone reduces urine volume is: A. Decrease in glomerular filtration rate B. Decreased renal blood flow C. Decreased water permeability of descending limb of loop of Henle D. Increased water permeability of collecting duct cells
Last Answer : D. Increased water permeability of collecting duct cells
Description : Which of the following hormones is secreted by the posterior pituitary? a) Vasopressin Vasopressin causes contraction of smooth muscle, particularly blood vessels. b) Calcitonin Calcitonin is secreted ... cortex. d) Somatostatin Somatostatin is released by the anterior lobe of the pituitary.
Last Answer : a) Vasopressin Vasopressin causes contraction of smooth muscle, particularly blood vessels.
Description : The early pregnancy uterus is sensitive to the following oxytocic: A. Oxytocin B. Methylergometrine C. Prostaglandin F2α D. Both ‘A’ and ‘B’ are correct
Last Answer : C. Prostaglandin F2α
Description : Corticosteroids are absolutely contraindicated in the following type of tuberculosis: A. Miliary B. Meningeal C. Intestinal D. Renal
Last Answer : C. Intestinal
Description : Blood flow in the following vascular bed generally decreases under the influence of glyceryl trinitrate: A. Coronary B. Cutaneous C. Renal D. Cranial
Last Answer : C. Renal
Description : Which of the following effects of epinephrine would be blocked by phentolamine but not by metoprolol ? (a) Cardiac stimulation (b) Contractionof radial smooth muscle in the iris (c) Increase of camp in fat (d) Relaxation of bronchial smooth muscle (e) Relaxation of the uterus
Last Answer : Ans: B
Description : Atropine does not exert relaxant/antispasmodic effect on the following muscle: A. Intestinal B. Ureteric C. Bronchial D. Laryngeal
Last Answer : D. Laryngeal
Description : Low doses of adrenaline dilate the following vascular bed (a) Cutaneous (b) Mucosal (c) Renal (d) Skeletal muscle
Last Answer : Ans: D
Description : Low doses of adrenaline dilate the following vascular bed: A. Cutaneous B. Mucosal C. Renal D. Skeletal muscle
Last Answer : D. Skeletal muscle
Description : Organic nitrates have predominantly venodilator action because: A. They are selectively concentrated in veins B. Veins express larger quantities of enzymes that generate nitric oxide from nitrates C. Venous smooth muscle has greater capacity to relax D. All of the above are correct
Last Answer : B. Veins express larger quantities of enzymes that generate nitric oxide from nitrates
Description : Organic nitrates relax vascular smooth muscle by (a) Increasing intracellular cyclic AMP (b) Increasing intracellular cyclic GMP (c) Decreasing intracellular cyclic AMP (d) Both (b) and (c)
Description : Regarding verapamil, which one of the following statements is false? (a) Angina pectoris is an important indication for the use of verapamil (b) Contraindicated in the asthmatic patient (c) ... phase of the action potential in AV nodal cells (e) Used in management of supraventricular tachycardias
Description : Leukotrienes: 1) Are formed from the cyclooxygenase pathway 2) Are synthesized by fibroblasts 3) Decrease vascular permeability 4) Leukotriene D4 has been identified as SRS-A which causes bronchial wall smooth muscle relaxation 5) Stimulate mucus secretion
Last Answer : Answers-5 Leukotrienes are synthesized by leucocytes.They are mediators of allergic reaction. They increase vascular permeability and attract neutrophils and eosinophils to inflammatory sites. ... stimulate mucus production, an important consideration in the pathophysiology of bronchial asthma.
Description : The following are true about potassium: a. hypokalaemia decreases the time of cardiac repolarization b. hyperkalaemia decreases cardiac contraction c. hyperkalaemia relaxes vascular smooth muscle d. all
Last Answer : all
Description : The action of histamine that is not mediated through H1 receptors is: A. Release of EDRF from vascular endothelium resulting in vasodilatation B. Direct action on vascular smooth muscle causing vasodilatation C. Bronchoconstriction D. Release of catecholamines from adrenal medulla
Last Answer : B. Direct action on vascular smooth muscle causing vasodilatation
Description : Match the source gland with its respective hormone and function and select the correct option. Source Hormone Function gland (a) Anterior Oxytocin Contraction of uterus pituitary muscles during ... (c) Corpus Estrogen Supports pregnancy luteum (d) Thyroid Thyroxine Regulates blood calcium level
Last Answer : (b) Posterior Vasopressin Stimulates pituitary reabsorption of water in the distal tubules in the nephron
Description : The collecting ducts in the kidney converge to form
Last Answer : The collecting ducts in the kidney converge to form A. Pyramid B. Calyx C. Pelvis D. Column of Bertin
Description : Furosemide inhibits reabsorption of sodium and chloride in (A) Proximal convoluted tubules (B) Loop of Henle (C) Distal convoluted tubules (D) Collecting ducts
Last Answer : Answer : B
Description : Antidiuretic hormone (A) Is secreted by hypothalamus (B) Secretion is increased when osmolality of plasma decreases (C) Increases obligatory reabsorption of water (D) Acts on distal convoluted tubules and collecting ducts
Last Answer : Answer : D
Description : In a normal nephron: a. the descending loop of Henle is impermeable to water b. anti-diuretic hormone (ADH) increases the permeability of collecting ducts to water c. all the filtered ... in the proximal tubule d. nearly all the filtered protein is reabsorbed in the proximal convoluted tubule
Last Answer : nearly all the filtered protein is reabsorbed in the proximal convoluted tubule
Description : The organ most sensitive to actions of atropine is: A. Gastric glands B. Salivary glands C. Urinary bladder muscle D. Heart
Last Answer : B. Salivary glands
Description : The harmone acting directly on intestinal mucosa and stimulating glucose absorption is (A) Insulin (B) Glucagon (C) Thyroxine (D) Vasopressin
Last Answer : Answer : C
Description : Arginine vasopressin is preferred over desmopressin in the following condition: A. Diabetes insipidus B. Bedwetting in children C. Bleeding esophageal varices D. Bleeding in haemophilia
Last Answer : C. Bleeding esophageal varices
Description : Che following is true of desmopressin except: A. It is nonselective V1 and V2 receptor agonist B. It is more potent and longer acting than arginine vasopressin (AVP) C. It is preferred over AVP for treatment of diabetes insipidus D. It can be administered orally
Last Answer : A. It is nonselective V1 and V2 receptor agonist
Description : Desmopressin is preferred over arginine vasopressin in the treatment of diabetes insipidus for the following reasons except: A. It is a more potent antidiuretic B. It is a selective vasopressin V1 receptor agonist C. It has little vasoconstrictor activity D. It is longer acting
Last Answer : B. It is a selective vasopressin V1 receptor agonist
Description : Which of the following peptides is a selective vasopressin V2 receptor agonist: A. Arginine vasopressin B. Desmopressin C. Lypessin D. Terlipressin
Last Answer : B. Desmopressin
Description : 6.2 Which hormone acts through a cytoplasmic receptor: A. Calcitriol B. Prolactin C. Vasopressin D. None of the abov
Last Answer : A.Calcitol binds to cytoplasmic membrane and enhances the absorption of Calcium by increasing the calcium binding proteins-calbindin-D proteins.
Description : All of the following tissue are capable of using ketone bodies except (A) Brain (B) Renal cortex (C) R.B.C. (D) Cardiac muscle