10th Class Biology Chapter 3 TestHUMAN BLOOD CIRCULATORY SYSTEM

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

1. Capillaries are the smallest blood vessels, and their walls are made of only a single layer of cells called ...... 

   1. Connective tissue

   2. Smooth muscle

   3. Endothelium

   4. Pericardium

2. Coronary Heart Disease (CHD) is the narrowing or blockage of:

   1. Renal arteries

   2. Coronary arteries

   3. Pulmonary arteries

   4. Hepatic portal vein

3. Red blood cells are also scientifically known as ......:

   1. Leukocytes

   2. Erythrocytes

   3. Platelets

   4. Plasma cells

4. Which of the following is an emergency treatment used to physically ope blocked coronary arteries?

   1. Dialysis

   2. Vaccination

   3. Angioplasty

   4. Asthma

5. Myocardial infarction is due to blockage of blood flow in:

   1. Aorta

   2. Pulmonary artery

   3. Coronary artery

   4. Hepatic artery

6. What is the average heart rate of a healthy adult human?

   1. 60 times per minute

   2. 70 times per minute

   3. 80 times per minute

   4. 100 times per minute

7. The bicuspid valve is located between which two chambers?

   1. Right atrium and right ventricle

   2. Left atrium and left ventricle

   3. Right ventricle and pulmonary artery

   4. Left ventricle and aorta

8. Which blood vessels contain valves to prevent the backflow of blood?

   1. Arteries

   2. Arterioles

   3. Veins

   4. Capillaries

9. Which blood vessels carry blood away from the heart?

   1. Veins

   2. Arteries

   3. Capillaries

   4. Venules

10. Small blood vessels are:

    1. Arteries

    2. Veins

    3. Capillaries

    4. Aorta