10th Class Biology Chapter 2 Test02. Circulatory system

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

1. The scientist who discovered pulmonary and systemic circulation was:
   1. Ibn al Nafees
   2. William Harvey
   3. Louis Pasteur
   4. Hippocrates
2. Which two components work together to stop bleeding?
   1. RBCs and WBCs
   2. Platelets and plasma proteins
   3. Platelets and hemoglobin
   4. WBCs and antibodies
3. The blood helps regulate body temperature by:
   1. Increasing heart rate
   2. Slowing blood flow to the skin
   3. Speeding up digestion
   4. Increasing breathing rate
4. Pulse is caused by:
   1. Valve opening
   2. Arterial wall vibration
   3. Vein contraction
   4. Heart valve closure
5. Blood from the head and neck is returned to the heart by:
   1. Jugular veins
   2. Subclavian veins
   3. Coronary veins
   4. Hepatic veins
6. Fatty acids and simple sugars are absorbed into the blood through:
   1. Capillaries
   2. Lacteals
   3. Arteries
   4. Veins
7. Immunoglobulins in plasma function to:
   1. Transport oxygen
   2. Defend against diseases
   3. Regulate blood sugar
   4. Store vitamins
8. Which substances are transported through blood?
   1. Oxygen
   2. Carbon dioxide
   3. Hormones
   4. All of these
9. A clot moving with the blood is called:
   1. Thrombus
   2. Embolus
   3. Plaque
   4. Infarction
10. Bicuspid valve connects:
    1. left atrium and right atrium
    2. left atrium and right ventricle
    3. right atrium and left ventricle
    4. right atrium and right ventricle