MCQs on Respiration and Respiratory Disorders | Class 10 level Biology MCQs

Biology MCQs for Grade X level students on the Chapter of Respiration. Here    

1. .......is an energy-releasing process.

A. Respiration  
B. Digestion
C. Excretion
D. None

2. In the process of respiration, food molecules, such as glucose, are broken down into simpler substances like ..........

A. Amino acids and fats
B. Amino acids and carbon dioxide
C. Carbon dioxide and water

3. .......... means the exchange of Oxygen and Carbon dioxide between an organism and its environment.

A. Photosynthesis
B. Respiration
C. Gaseous exchange
D. All of the above

4. Gaseous exchange occurs by the process of .......

A. Osmosis
B. Diffusion
C. Both osmosis and diffusion
D. None

5. .........is a physical process in which animals move air into and out of their body.

A. Breathing
B. Gaseous exchange
C. Diffusion
D. None

6. Humans have an efficient respiratory system adopted for ..........mode of life.

A. Aquatic
B. Marine
C. Terrestrial
D. None

7. After gaseous exchange air moves to the outside through the same connected tubes. These connected tubes are collectively called.......

A. Air passageway
B. Nasal cavity
C. Trachea
D. Bronchi

8. ........... allow the air from the outside into two nasal cavities.

A. Pharynx
B. External Nostrils
C. Internal nostrils
D. None

9. The nasal cavity leads into the pharynx, which is about.......inches.

A. 4
B. 4.5
C. 5
D. 5.5

10. Pharynx is lined by the.......

A.Cilia
B. Flagella
C. Mucous membrane
D. None

11. Layrnx is also known as.....

A. Food pipe
B. Sound box/voice box
C. Wind box
D. Dual box

12. At the back of the Phyrnx are two passages, one opens into the esophagus on the dorsal side, and the other opens through the .........into the trachea on the ventral side.

A. Glottis
B. Epiglottis
C. Subglottis
D. All of the above.

13. Trachea is also known as.....

A. Food pipe
B. Sound box/voice box
C. Windpipe
D. Dual box

14. The trachea has 16 to 20 C-shaped .......rings.

A. Muscular
B. Cartilaginous
C. Bony
D. None of them

15. Inside the Thorax, the trachea divide into two branches called.....

A. Bronchioles
B. Alveoli
C. Bronchi
D. All of them.

16. Each bronchus (right & left) also possesses the cartilaginous Rings, but...... then those after tracheas.

A. Larger
B. Smaller
C. Equal
D. None of them.

17. When the smaller bronchi attained a diameter of 1 mm or less than they are called.....

A. Bronchus
B. Bronchioles
C. Alveolus
D. All of them.

18. ...... walled and provide the surface for patients exchange.

A. Bronchioles
B. Alveoli
C. Both Bronchioles and Alveoli
D. None

19. A thick muscular structure that encloses the lungs is called.....

A. Membrane
B. Diaphragm
C. Pericardium
D. Peritoneum

20. Each lung is enclosed in a double membrane structure called.....

A. Pleura
B. Peritoneum
C. Diaphragm
D. All of them.

21. During inspiration, the volume of the chest cavity....... and pressure in the lungs.......

A. Decreases, Increases
B. Increases, Decreases
C. None of them

22. Tobacco smoke contains .......... different chemicals.

A. 4000
B. 6000
C. 8000
D. 10,000

23. There are more than 69 known......present in cigarette smoke.

A. Pathogens.
B. Carcinogens
C. Halogens

24. ........In its solid form stain the teeth and fingers.

A. Tar
B. Carbon dioxide
C. Benzene
D. None

25.........also increases the production of mucus and flag up.

A. Tar
B. Carbon dioxide
C. Benzene
D. None

26. .........has many harmful effects such as increased heart rate and blood pressure, Constriction in the blood vessel, damage to the muscle, and disturbance in the hormonal system and metabolism.

A. Tar
B. Nicotine
C. Benzene.
D. Carbon monoxide.

27. .......Combines with red blood cells and prevents oxygen transport.

A. Nicotine
B. carbon dioxide
C. Benzene
D. Formaldehyde

28. ......is a major component of cigarettes. 

A. Benzene
B. Nicotine

C. Carbon dioxide
D. Formaldehyde.

29. .........present in cigarette cause cancer and respiratory, skin, and gastrointestinal 

problems.

A. Benzene
B. Formaldehyde 
C. Metals
D. Nicotine

30. Another name for blood cancer is......

A. Anemia
B. Leukemia
C. Natremia
D. None

31. ........different metals are also found in cigarette smoke, such as Arsenic, nickel, cadmium, chromium, and Lead.

A. 30
B. 40
C. 50
D. 60

32. Under resting conditions, the rate of breathing is.......times per minute.

A. 10-15
B. 15-20
C. 20-30
D. None

33. Oxygen is required for the oxidation of......to get more energy.

A. Fructose
B. Glucose
C. Lactose
D. All of them 

34. The breathing center located in the part of the brain known as......detects more carbon dioxide in the blood and sends nerve impulses to the diaphragm and rib muscle at greater speed.

A. Pons
B. Medulla
C. Cerebrum
D. None

35. During exercise, the breathing rate increases up to........ times per minute.

A. 20-25
B. 25-30
C. 30-35
D. 30-40

36. When the lining of bronchi or bronchioles, becomes inflamed or infected this condition is called......

A. Bronchitis
B. Phayrngitis
C. Esopgagitis
D. None

(other MCQs are waiting in the list, and will come soon)

Answer Key

MCQ Number	Correct Option	MCQ Number	Correct Option	MCQ Number	Correct Option
1	A	2	C	3	C
4	B	5	A	6	C
7	B	8	C	9	B
10	C	11	B	12	A
13	C	14	B	15	C
16	B	17	B	18	B
19	B	20	A	21	B
22	A	23	B	24	A
25	A	26	B	27	B
28	A	29	B	30	B
31	A	32	B	33	D
34	B	35	D	36	A
37		38		39
40		41		42
43		44		45
46		47		48
49		50		51
52		53		54
55		56		57
58		59		60
61		62		63
64		65		66
67		68		69
70		71		72
73		74		75
76		77		78
79		80		81
82		83		84
85		86		87
88		89		90
91		92		93
94		95		96
97		98		99
100