Tiêu đề 18. BODY FLUIDS AND CIRCULATION.pdf ✅

18. BODY FLUIDS AND CIRCULATION 1. The blood returning to the heart from lungs via pulmonary vein has more (a) RBC per ml of blood (b) Haemoglobin per ml of blood (c) Oxygen per ml of blood (d) Nutrient per ml of blood 2. Systemic heart refers to (a) The two ventricles together in humans (b) The heart that contracts under stimulation from nervous system (c) Left auricle and left ventricle in higher vertebrates (d) Entire heart in lower vertebrates 3. The nerve like modified muscle in the right auricle is known as (a) Lymph node (b) Atrio-ventricular node (c) Pacemaker (d) Bulbus arteriosus 4. The first heart sound is (a) 'Lubb' sound at the end of systole (b) 'Dub' sound at the end of systole (c) 'Lubb' sound at the beginning of systole (d) 'Dub' sound at the beginning of systole 5. If heart of a mammal was injected with 2% solution, then (a) Heart beat will increase (b) Heart beat will decrease (c) Heart beat will stop (d) No effect 6. In the heart of mammal the bicuspid valve is situated between (a) Left auricle and left ventricle (b) Post caval and right caval (c) Right auricle and left auricle (d) Right ventricle and pulmonary aorta 7. The auriculo-ventricular node in human heart was discovered by (a) Hiss (b) Loewis (c) Ringer (d) William Harvey 8. The heart of a healthy man beats normally per minute (a) 60-70 times (b) 70-80 times (c) 80-90 times (d) 85-95 times 9. Nature of valves in the heart is (a) Membranous (b) Muscular (c) Tendinous (d) Ligamentous 10. Since it is the sinu-auricular node which initiates the impulses in the heart of mammal is called (a) Cholinergic (b) Adrenergic (c) Neurogenic (d) Myogenic 11. Systolic pressure is higher than diastolic pressure because (a) Arteries are contracting during systole (b) Blood is pumped with a pressure in the arteries by the heart during systole but not during diastole. (c) Arteries resist during systole only. (d) Volume of blood is higher in systole than that of diastole in the heart CaCl2


(a) Collecting vessel in first two segments and distributing vessel in other (b) Distributing vessel in first five segments and collecting vessel in other (c) Collecting vessel in first thirteen segments & distributing vessel in intestinal region (d) Distributing vessel in first thirteen segments & collecting vessel in intestinal region 37. 1. In several vertebrates the rate of heart beat and increase in blood pressure is caused by a hormone (a) Thyroxin (b) Secretin (c) Noradrenalin (d) Adrenalin 1. Sphygmomanometer measure (a) Nerve conduction rate (b) Heart beat rate (c) Blood pressure (d) Pulse rate 39. In man, the normal blood pressure is maintained by the blood protein called (a) Haemoglobin (b) Albumin (c) Fibrinogen (d) Heparin 40. ECG records (a) Electric current of the body (b) Potential differences (c) Pulse rate (d) Quantity of blood pumped per minute 41. QRST is related with (a) Ventricular contraction or depolarization (b) Auricular contraction (c) Auricular relaxation (d) Cardiac cycle 42. In a normal adult man, the blood pressure is (a) 100/80 (b) 120/80 (c) 100/120 (d) 100/100 43. Fall in blood pressure due to loss of blood is soon restored because the (a) Blood vessels dilate (b) Blood cells decrease in number (c) Heart beat is increased (d) Heart beat is decreased 44. Which of the following is a repolarization wave (a) (b) (c) (d) None of these 45. Normal diastolic pressure in young man is about (a) (b) (c) (d) 46. How much atrial pressure rises during atrial contraction (a) 2-4 (b) 4-6 (c) 6-8 (d) Does not rise at all 47. What is the end diastolic volume of blood in a normal adult heart (a) (b) (c) (d) 48. What is blood pressure (a) The pressure of blood on the heart muscle (b) The pressure of blood exerted on the walls of arteries and veins Hg HgHgHg P T QRS 20 mm Hg 80 mm Hg 100 mm Hg 130 mm Hg (mm Hg) 50 ml 70 ml 90 ml 110 ml