DPT Entry Test (Physiotherapy) Biology: Circulation MCQs

Practice Circulation MCQs for DPT Entry Test (Physiotherapy) Biology — topic-wise sets with solved answers.

DPT Entry Test (Physiotherapy) Biology: Circulation MCQs — sample questions

  1. Question 1

    Q1. During strenuous exercise, which blood vessel is primarily responsible for supplying oxygenated blood to the skeletal muscles?

    • A) Arterioles
    • B) Venules
    • C) Capillaries
    • D) Arteries

    Answer: Arterioles

    Explanation: Arterioles regulate blood flow to capillaries; they are primary suppliers of oxygenated blood to muscles during exercise. Venules collect deoxygenated blood.

  2. Question 2

    Q2. What is the primary function of the sinoatrial (SA) node in the heart?

    • A) To conduct impulses to the ventricles
    • B) To initiate heartbeats
    • C) To regulate blood pressure
    • D) To filter blood

    Answer: To initiate heartbeats

    Explanation: The SA node acts as the heart's natural pacemaker, initiating heartbeats. The AV node conducts impulses to ventricles.

  3. Question 3

    Q3. Which structure in the heart prevents backflow of blood from the ventricles to the atria?

    • A) Semilunar valves
    • B) Atrioventricular valves
    • C) Chordae tendineae
    • D) Papillary muscles

    Answer: Atrioventricular valves

    Explanation: Atrioventricular valves prevent backflow from ventricles to atria. Semilunar valves prevent backflow from arteries to ventricles.

  4. Question 4

    Q4. What is the term for the pressure exerted by blood on the walls of blood vessels?

    • A) Blood pressure
    • B) Osmotic pressure
    • C) Hydrostatic pressure
    • D) Turgor pressure

    Answer: Blood pressure

    Explanation: Blood pressure is the pressure exerted by blood on vessel walls. Hydrostatic pressure is a related concept but not specific to blood.

  5. Question 5

    Q5. Which type of blood vessel has the thickest walls relative to their lumen diameter?

    • A) Arteries
    • B) Veins
    • C) Capillaries
    • D) Arterioles

    Answer: Arteries

    Explanation: Arteries have thick walls to withstand high pressure from the heart. Veins have thinner walls and larger lumens.

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