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Punjab (PTB) · Chapter test · Free

1st Year Biology Chapter 11 TestHuman Circulatory System

30 marks · 40 minutes · 21 questions. Covers: CHAP 11: Human Circulatory System.

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1st Year Biology Chapter 11 Test

1st Year · Biology · Punjab (PTB)

Name: ____________Roll No: ________Class/Section: ________Date: ________Total marks: 30Time: 40 minutes

Q1. Multiple choice questions (Attempt all · 10 × 1 = 10)

  1. What prevents backflow of blood in veins?

    1. Arterial pressure

    2. Gravity

    3. Semilunar valves

    4. Pulmonary action

  2. Which ECG segment is prolonged in a first-degree heart block?

    1. ST segment

    2. QT interval

    3. PR segment

    4. QRS complex

  3. What protects the heart from mechanical shocks and friction?

    1. Blood vessels

    2. Pericardial sac

    3. Lung tissue

    4. Diaphragm

  4. Atrial natriuretic hormone (ANH) is released in response to:

    1. Low blood pressure

    2. Dehydration

    3. Stretching of right atrium due to increased blood volume

    4. Low salt levels in blood

  5. What is the internal diameter of a capillary?

    1. 5 micrometres

    2. 10 micrometres

    3. 8 micrometres

    4. 15 micrometres

  6. The pulmonary arteries carry blood to the:

    1. Heart

    2. Brain

    3. Lungs

    4. Liver

  7. What is the main function of tunica media in arteries?

    1. Absorb-nutrients

    2. Withstand high blood pressure during ventricular systole

    3. Store red blood cells

    4. Assist in digestion

  8. Lymphatic vessels are formed by joining of

    1. Veins

    2. Lymph capillaries

    3. Arteries

    4. Lymph ducts

  9. What is the state of bicuspid and tricuspid valves at the end of the first heart sound?

    1. Bicuspid is closed, tricuspid is open

    2. Bicuspid is open, tricuspid is closed

    3. Both are open

    4. Both are closed

  10. What is the central core of an artery called?

    1. Tunica media

    2. Intima

    3. Lumen

    4. Sinus

Q2. Short questions (Attempt any 6 of 8 · 6 × 2 = 12)

  1. State the phases of heartbeat.

  2. What type of blood does the pulmonary circulation carry to the lungs?

  3. How does hypertension affect the kidneys?

  4. What are the possible effects of thrombosis?

  5. What is the pathway of deoxygenated blood through the heart?

  6. What do you mean by vasoconstriction and vasodilation?

  7. What does a prolonged PR segment suggest?

  8. What are the two systems for the transport of different materials in the human body?

Q3. Long questions (Attempt any 2 of 3 · 2 × 4 = 8)

  1. Define hypertension and describe the factors that regulate blood pressure and can lead to hypertension and hypotension

  2. List the changes in life styles that can protect man from hypertension and cardiac problems.

  3. Write a detailed note on the types of blood pressure & its regulation.