Biology Practice: Circulatory System (Mock Test 4 - Expert/Experimental)
1. In a clinical observation, a patient's blood fails to clot even after 10 minutes of a minor cut. Experimental analysis shows a normal platelet count but a deficiency in a specific plasma protein. Which protein is likely missing?
2. During a heart transplant, the 'Vagus Nerve' (which slows down the heart) is severed. What would be the most likely immediate experimental observation of the donor heart's rate?
3. A scientist injects a dye into the 'Hepatic Portal Vein'. Which organ will show the presence of the dye first?
4. Why does an 'upward' movement of blood in the veins of the legs occur against gravity?
5. 'Erythroblastosis Foetalis' is a serious condition that can occur during pregnancy if:
6. If the 'Chordae Tendineae' of the Bicuspid valve are ruptured, what will be the immediate physiological consequence?
7. A blood sample is mixed with 'Anti-A' and 'Anti-B' antibodies. Clumping occurs only with Anti-A. What is the blood group?
8. Which specific component of the 'Conduction System' of the heart is responsible for causing the Ventricles to contract simultaneously?
9. During heavy exercise, the 'Lactic Acid' produced in muscles is carried to the liver for neutralization. Which circulatory loop handles this?
10. An expert diagnosis of 'Atherosclerosis' implies that the lumen of the artery has become narrow. What is the primary cause?
11. If the 'Semilunar Valves' fail to close properly, the second heart sound (DUPP) will be affected. This indicates a backflow from:
12. The term 'Infarction' in a myocardial infarction (heart attack) refers to:
13. In a laboratory test, a patient's blood is found to have a very low 'Prothrombin' level. Which vitamin deficiency is most likely responsible?
14. What is the physiological reason for the 'Atrial Delay' (a short pause) before the electrical impulse reaches the Ventricles?
15. A 'Sphygmomanometer' cuff is usually placed over the 'Brachial Artery'. Why an artery and not a vein?
16. 'Tissue Fluid' is formed because of high pressure in the capillaries. Most of it returns to capillaries, but the rest is drained by:
17. An 'Artificial Pacemaker' is surgically implanted in a patient. Which natural structure is it replacing the function of?
18. 'Haemoglobin' has a very high affinity for which gas, making it dangerous in closed rooms with burning coal?
19. In a 'Pulmonary Bypass' surgery, which circulatory path is temporarily handled by a machine?
20. 'Leukopenia' is an experimental observation where there is an abnormal ________ in the number of WBCs.