Question

Choose the best answer:

1. The absorption of nutrients and exchange of respiratory gases between blood and tissues takes place in –

a) veins                 b) arteries        c) heart            d) capillaries

2. Oxygen is carried in human body by which of these?

a) Blood                   b)  Food             c) Urine              d) Water

3. Which one of the following contains haemoglobin?

a) RBC                    b) WBC              c) Platelets          d) None of these

4. What is the function of WBCs?

a) Transport of oxygen               b) Fight against germs

c) Involved in blood clotting    d) All of these

5. Blood platelets help in

a) formation of urine b) excretion of urine

c) sweating                       d) blood clotting

6. The muscular tube through which stored urine is passed out of the body is called:

a) kidney                 b) ureter             c) urethra           d) urinary bladder

7. Which of the following is the main circulatory fluid in our body?

a) Plasma                 b) Lymph           c) Blood             d) None of these

8. Blood cells that protect the body from diseases are:

a) platelets               b) RBCs             c) WBCs            d) skin cells

9. What prevents the backflow of blood inside the heart during contraction?

a) thick muscular walls of ventricles                  b) valves

c) thin walls of atria                                      d) all of the above

 

10. Which vein brings clean blood from the lungs into the heart?

a) renal vein             b) pulmonary vein

c) vena cava             d) hepatic vein

11. Which does blood vessels not carry any carbon dioxide?

a) pulmonary artery                 b) vena cava

c) hepatic vein                   d) pulmonary vein

12. Coagulation of blood in a cut or wound is brought about by:

a) plasma                 b) platelets                   c) WBCs                  d) RBCs

13. The filtering unit in the human excretory system is called:

a) nephron               b) neuron           c) nephridia                  d) ureter

14. The rhythmic contraction and expansion of the heart are called————-.

a) Blood pressure                  b) Heart beat

c) Pulse rate                      d) none of these

15. How many Chambers are present in heart?

a) 2                          b) 3                     c) 5                     d) 4​

Answer 1

Answer:

1. b

2.a

3.a

4.b

5.d

6.d

7.c

8.c

9.a

10.a

11.ç

12.b

13.b

14.b

15.4

Hope it will help u and u have to mark it as brainliest as I have give u time 4 these....

Answer 2

Answer:

1 (capillaries )

2 ( blood)

3(RBC)

4 (fight against)

5(blood clotting)

6(urethra)

7(blood)

8(WBCs)

9(all of above)

10(pulmonary vein)

11(pulmonary artery)

12(platelets)

13(nephrons)

14(heartbeat)

15(4)