1. venous return to heart during quiet standing is facilitated by all of the following factors except calf muscle contraction during standing valves in perforators gravitational increase in arterial pressure sleeves of deep fascia 2. in a normal person which of the following occurs when he becomes supine from a standing position there is an immediate increase in venous return cerebral blood flow increases heart rate increases and settles to a higher level decreased perfusion at the apex of lung 3. Cardiac output is increased by all except Pregnancy Standing from lying down Exercise hot atmosphere 4. site of RBC formation in a healthy 20 year old male is flat bones liver yolk sac long bones 5. which of the following is the active form of calcium in circulation protein bound calcium phosphate bound calcium ionized calcium albumin bound calcium 6. sertoli cells play a key role in which of the following process production of germ cell testosterone secretion spermiogenesis secretion of seminal fluid 7. What is the most common cause of an atrial septal congenital heart malformation? Failure of formation of the septum secundum Malformation of the membranous interventricular septum Failure of formation of the septum primum Incomplete adhesion between the septum primum and septum secundum 8. The oxygen hemoglobin dissociation curve is sigmoid because Binding of one oxygen molecule increases the affinity of binding other O2 molecules Oxygen affinity of haemoglobin decreases when the pH of blood falls Binding of oxygen to hemoglobin reduces the affinity of Hb for CO2 Binding of one oxygen molecule decrease the affinity of binding other O2 molecules 9. Angiotensin II causes all of the following, except Vasodilatation Stimulation of thirst Increased ADH secretion Aldosterone secretion 10. Release of neurotransmitter from presynaptic vesicles is an example of Active transport Exocytosis Simple diffusion Facilitated diffusion 11. When the pulse is greater than 200/min and the blood pressure is 75/40 mm Hg, what adjustments have probably occurred in the cardiac cycle? Diastolic time has decreased and systolic time has increased Systolic time has decreased but diastolic time has decreased more Systolic time has decreased and diastolic time has increased Diastolic time has decreased but systolic time has decreased more 12. Pulmonary circulation is characterised by vasodilation in response to hypoxia vasoconstriction in response to hypoxia Vasoconstriction in response to hypercapnia Resistance is greater than systemic circulation 13. Following is given with iron to increase its absorption Antacids Alkalies Citrus fruits Milk 14. Which of the following regions of the nephron is capable of the greatest level of glucose reabsorption? Proximal convoluted tubule Thick ascending limb of loop of henle Distal convoluted tubule Collecting duct 15. Which of the following binds to von Willebrand factor at the platelet membrane? Platelet factor 3 (PF3) Glycoprotein GPIb Calcium Adenosine diphosphate (ADP) 16. Transport of Carbon monoxide is diffusion limited because High affinity of CO for haemoglobin Alveolar membrane is less permeable to CO CO crosses epithelial barrier slowly On exposure to air,there is sudden increase in partial pressure 17. Caisson disease Gas embolism Tumor embolism Fat embolism Amniotic fluid embolism 18. Ringer lactate contains all except Potassium bicarbonate Chloride Sodium 19. Which of the following regulates the frequency of gastrointestinal slow waves? Circadian rhythms Dietery intake of fiber Local levels of cholecystokinin secretion Intrinsic pacemaker regions within the smooth muscle 20. Function of myenteric plexus is to regulate Motility Local blood flow GI secretion All of the above Loading … Question 1 of 20
