Body Fluids And Circulation Chapter-Wise Test 1

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which plasma protein is primarily responsible for blood clotting?

Albumin
Globulin
Fibrinogen
Collagen
3

Fibrinogen is converted to fibrin during blood clotting, forming a mesh that helps stop bleeding.

Which component of blood helps in the transport of CO₂?

Plasma
Platelets
Erythrocytes
Leukocytes
3

Erythrocytes (RBCs) transport carbon dioxide mainly in the form of bicarbonate ions (HCO₃⁻).

Which of the following statements about blood pressure is incorrect?

Systolic pressure is the pressure exerted when the ventricles contract.
Diastolic pressure occurs when the heart relaxes.
A normal blood pressure reading is 90/60 mmHg.
Blood pressure is measured using a sphygmomanometer.
3

The normal blood pressure is about 120/80 mmHg, not 90/60 mmHg (which indicates low blood pressure).

Which term describes the contraction of the heart chambers?

Diastole
Systole
Repolarization
Depolarization
2

Systole refers to the contraction phase of the heart, during which blood is pumped out.

What is the term for the relaxation phase of the heart?

Systole
Diastole
Depolarization
Repolarization
2

Diastole is the relaxation phase of the heart, allowing blood to fill the chambers.

Which of the following is correct about the cardiac cycle?

The cardiac cycle lasts approximately 2 seconds.
Systole refers to heart muscle relaxation.
The cardiac cycle consists of systole and diastole.
Diastole occurs when the heart contracts.
3

The cardiac cycle consists of systole (contraction) and diastole (relaxation) of the heart chambers.

Which statement about the heart sounds is correct?

The "Lub" sound is caused by the closure of the semilunar valves.
The "Dub" sound is due to the closure of the AV valves.
The "Lub" sound is caused by the closure of the AV valves.
Both sounds occur simultaneously.
3

The "Lub" sound occurs when the AV valves (tricuspid and bicuspid) close, while the "Dub" sound occurs when the semilunar valves close.

Which of the following prevents backflow of blood in veins?

Capillaries
Valves
Endothelium
Smooth muscle
2

Veins have valves to prevent backflow and ensure unidirectional blood flow.

Which of the following heart valves is also known as the mitral valve?

Tricuspid valve
Pulmonary valve
Aortic valve
Bicuspid valve
4

The bicuspid valve is also called the mitral valve and is located between the left atrium and left ventricle.

Which of the following statements about the pericardium is correct?

It is a muscular layer of the heart.
It generates electrical impulses.
It reduces friction between the heart and surrounding structures.
It pumps blood into the aorta.
3

The pericardium is a protective membrane filled with fluid that reduces friction during heartbeats.

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