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Heart And Circulatory System (Part-II)

📆 November 5, 2024

Total Questions: 33

21. Which of the following statements about blood pressure is correct? [S.S.C Online CHSL (T-1) 6.05.2021 (Shift-I)]

Correct Answer: (b) The normal systolic pressure is about 120 mm of Hg and diastolic pressure is 80 mm of Hg.
Solution:

There are two levels of blood pressure in the arteries. The first is called systolic pressure and the second is called diastolic pressure. Normally, the systolic pressure in human arteries is 120 mm Hg and the diastolic pressure is 80 mm Hg. It is measured by the Sphygmomanometer instrument.

22. The diastolic pressure (mm of Hg) in a healthy person is: [S.S.C. Online MTS (T-4) 28.01.2017 (Shift-I)]

Correct Answer: (b) 80
Solution:

There are two levels of blood pressure in the arteries. The first is called systolic pressure and the second is called diastolic pressure. Normally, the systolic pressure in human arteries is 120 mm Hg and the diastolic pressure is 80 mm Hg. It is measured by the Sphygmomanometer instrument.

23. What is normal blood pressure in humans? [S.S.C Online C.P.O. SL 5.06.2016 (Shift-I)]

Correct Answer: (b) 120/80
Solution:

This reiterates the standard normal blood pressure reading, with 120 mm of Hg as the systolic pressure and 80 mm of Hg as the diastolic pressure.

24. ______ is a medical instrument used for listening to sounds produced within the body, chiefly in the heart or lungs. [S.SC. Online MTS (T-1) 22.10.2021 (Shift-I)]

Correct Answer: (b) Stethoscope
Solution:A stethoscope is a widely recognized medical device used by healthcare professionals to auscultate (listen to) internal sounds of the body, particularly the heart and lungs, to diagnose various conditions.

25. Both erythrocytes and leukocytes are formed in: [S.S.C. Online Graduate Level (T-1) 11.08.2017 (Shift-III), SS.C. Online MTS (T-1) 21.09.2017 (Shift-I)]

Correct Answer: (a) Marrow
Solution:Erythrocytes (red blood cells) and leukocytes (white blood cells) are both produced in the bone marrow, specifically the red bone marrow, through a process called hematopoiesis.

26. In the human body, "Thrombin" plays an important role in which of the following physiological processes? [C.P.O. 5.1. 4.06.2016 (Shift-I)]

Correct Answer: (b) Blood clotting
Solution:Thrombin is a serine protease that plays a physiological role in regulating hemostasis and maintaining blood coagulation. Once converted from prothrombin, thrombin converts fibrinogen to fibrin, which forms a clot in combination with platelets from the blood.

27. Prothrombin, responsible for clotting of blood, is released by: [S.S.C. Online CHSL (T-4) 19.01.2017 (Shift-I)]

Correct Answer: (b) Blood Platelets
Solution:While the liver produces prothrombin, in the context of it being released to initiate clotting, it's more accurate to say that platelets (also known as thrombocytes) play a critical role in activating prothrombin into thrombin at the site of injury. Platelets aggregate at the injury site and release various factors, including those that lead to the activation of prothrombin.

28. ________ is a hormone that regulates the amount of glucose in the blood. [S.S.C. Online Graduate Level (T-1) 31.08.2016 (Shift-I)]

Correct Answer: (d) Insulin
Solution:Regulation of blood glucose is largely done through the endocrine hormones of the pancreas, maintaining a balance through a negative feedback loop. The main hormones of the pancreas that affect blood glucose include insulin (formed in pancreatic beta cells) which lowers blood glucose levels, and glucagon (from pancreatic alpha cells) which elevates blood glucose levels.

29. Which drug is used as a Blood Thinner? [S.S.C. Online CHSL (T-1) 01.02.2017 (Shift-I)]

Correct Answer: (a) Warfarin
Solution:Anticoagulants, such as heparin or warfarin (also called Coumadin), slow down the body's process of making clots. Antiplatelets, such as aspirin and clopidogrel, prevent blood cells called platelets from clumping together to form a clot.

30. The presence of air bubbles in the bloodstream is dangerous to life because: [S.S.C. Online Graduate Level (T-1) 03.09.2016 (Shift-I)]

Correct Answer: (c) The flow of blood is obstructed
Solution:Air bubbles (air embolism) in the bloodstream can obstruct the flow of blood, particularly in smaller blood vessels. If a large air bubble reaches the heart or brain, it can block blood flow, leading to serious and potentially fatal consequences such as heart attack, stroke, or organ damage.
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