Body Fluids and Circulation Chapter-Wise Test 14

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which condition results from the inability of blood to clot properly?

Hypertension
Hemophilia
Atherosclerosis
Leukemia
2

Hemophilia is a genetic disorder in which blood clotting factors are deficient, leading to excessive bleeding.

Which blood vessel carries deoxygenated blood from the body to the heart?

Pulmonary artery
Pulmonary vein
Aorta
Vena cava
4

The vena cava carries deoxygenated blood from the body to the right atrium of the heart.

Which of the following is a characteristic of veins?

Thick muscular walls
Carry blood under high pressure
Have valves to prevent backflow
Always carry oxygenated blood
3

Veins have valves that prevent backflow and ensure unidirectional blood flow toward the heart.

Which condition occurs due to the failure of the heart to pump blood effectively?

Hypertension
Heart failure
Angina
Arrhythmia
2

Heart failure occurs when the heart is unable to pump blood effectively to meet the body's needs.

Which component of the blood fights infections and provides immunity?

Erythrocytes
Platelets
Leukocytes
Plasma
3

Leukocytes (WBCs) are responsible for immune responses and fighting infections.

Which of the following is incorrect regarding blood clotting?

Platelets release clotting factors.
Thrombin converts fibrinogen into fibrin.
Calcium ions play no role in clot formation.
A blood clot is also known as a thrombus.
3

Calcium ions (Ca²⁺) are essential for the blood clotting cascade, activating clotting factors.

Which of the following statements about WBCs is incorrect?

WBCs can move out of blood capillaries through diapedesis.
Lymphocytes are involved in antibody production.
Neutrophils are the least abundant type of WBCs.
Basophils release histamine during allergic reactions.
3

Neutrophils are the most abundant WBCs, constituting about 60-65% of total WBC count.

Which of the following is incorrect about erythrocytes?

They are involved in oxygen transport.
They have a nucleus in mature form.
They contain hemoglobin.
They have a lifespan of about 120 days.
2

Mature RBCs lack a nucleus, which increases their space for hemoglobin and oxygen transport.

Which of the following is incorrect about veins?

Veins carry blood toward the heart.
Veins always carry deoxygenated blood.
Veins have valves to prevent backflow of blood.
Veins have thinner walls than arteries.
2

Pulmonary veins carry oxygenated blood from the lungs to the heart, so not all veins carry deoxygenated blood.

Which term describes the resistance to blood flow in blood vessels?

Cardiac output
Blood viscosity
Peripheral resistance
Stroke volume
3

Peripheral resistance is the opposition to blood flow within blood vessels, influencing blood pressure.

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