Chapter No 10 Gases exchange solved mcqs

1. Myoglobin is found in:

a. bone

b. connective tissues

c. muscles✅

d. cartilage

2. B.C.G vaccines are usually given to:

a. children✅

b. adults

c. special persons

d. all of these

3. Myoglobin combines with:

a. four oxygen molecules

b. three oxygen molecules

c. two oxygen molecules

d. one oxygen molecule✅

4. The oxygen-carrying capacity of hemoglobin in humans when the blood is 100% oxygenated is:

a. 19.4 ml

b. 19.6 ml

c. 20 ml✅

d. 21 ml

5. Which of the following ions play an important role in the transport of carbon dioxide?

a. sodium

b. potassium

c. bicarbonate✅

d. chloride

6. Percentage of CO2 carried by plasma is:

a. 5%

b. 6%

c. 7%✅

d. 8%

7. The process responsible for energy production in animals is:

a. photosynthesis

b. digestion

c. respiration✅

d. circulation

8. Amount of O2 carried by red blood cells is:

a. 77%

b. 90%

c. 87%

d. 97%✅

9. Smaller is the animal, ______?

a. more is the rate of respiration✅

b. less is the rate of respiration

c. no effect of size on the rate of respiration

d. none

10. If the lateral side of the grasshopper is covered with wax, the system is affected more?

a. digestive

b. circulatory

c. respiratory✅

d. excretory

11. In hydra, planaria, and earthworm, the exchange of gases occurs through:

a. lungs

b. gills

c. trachea

d. body surface✅

12. Otitis media is an inflammation of which part of the body?

a. Brain

b. Middle ear✅

c. Lungs

d. Urinary tract

13. Of 100ml of arterial blood, oxygen provided to the tissue is:

a. 2 ml

b. 3 ml

c. 4 ml

d. 5 ml✅

14. Expiratory center in medulla is?

a. Dorsal✅

b. Ventral

c. Lower part

d. All of the above

15. The center of porphyrine in the head region of hemoglobin is occupied by:

a. Potassium

b. Sodium

c. Magnesium

d. Iron✅

16. The alveoli represent the total surface area of:

a. 10-30m²

b. 30-60m²

c. 70-90m²✅

d. 90-110m²

17. Following nasal passages are made of cartilage except: Chapter No 10 Gases exchange