Respiration in organisms Worksheet-6

Respiration in organisms Worksheet-6

Multiple-Choice Questions:

16. The given picture depicts the fermentation of homemade beer. The gas being produced in the container on the extreme left is:

(a) carbon dioxide                           (b) water vapour

(c) Oxygen                                        (d) Nitrogen

17. The given picture depicts the fermentation of homemade beer. One reason for the tube passing into the cup of water is to:

(a) prevent the escape of carbon dioxide

(b) water down the beer

(c) provide water that is necessary for fermentation

(d) Prevent the entry of freely into the fermentation bottle

18. Which one of the following statements is incorrect?

(a)  Tuberculosis is highly infectious and can be spread by airborne droplets.

(b)  In Pulmonary Tuberculosis the elasticity of lungs is reduced.

(c)  Tuberculosis can't be treated by antibiotics

(d)  Tuberculosis is caused by a rod-shaped bacterium, Mycobacterium tuberculosis.

19. Which one of the followings is NOT correct regarding Exhalation (expiration)?

(a) During exhalation, elastic properties of the lung help to expel deoxygenated air

(b) Expiration is typically a passive process

(c) Exhalation starts when the expiratory muscles relax

(d) The elastic properties of the lung help to expel deoxygenated air during exhalation

20. The given figure shows a small part of human lung where exchange of gases takes place. In which one of the following options given below, one part A, B, C or D is correctly identified along with its function?

(a) A : alveolar cavity- main site of exchange of respiratory gases

(b) B : Red blood cell- transport of CO₂

(c) D : Capillary wall- exchange of O₂ and CO₂ takes place

(d) C : Arterial capillary- passes oxygen to tissues

Fill in the Blanks:

1. In animals such as insects, there are several holes called ______ in the body.
2. Air enters an insect’s body through the spiracles and is carried through tubes called ______ tubes.
3. Most mammals such as cats, dogs, horses, human beings, etc., breathe with the help of special sac-like, spongy organs called ______.
4. Lungs are present inside our chest which is also called______.
5. Beneath the lungs, there is a dome-shaped muscle called the_______.

True/False:

1. Increased physical activity enhances the rate of breathing.
2. In earthworm, the exchange of gases occurs through the alveoli.
3. Animals such as frogs and snakes respire through their skins.
4. Plants respire with the help of tiny holes called lenticels.
5. In fishes, respiration takes place through gills and in insects through the tracheae.
6. Plants carry out photosynthesis only during the day and respiration only at night.
7. The size of the chest cavity increases during inhalation.

Answer key:

Multiple-Choice Questions:

16. (A)
17. (D)
18. (C)
19. (C)
20. (A)

Fill in the Blanks:

1. Spiracles
2. Tracheal
3. Lungs
4. Thorax
5. Diaphragm

True/False:

1. T
2. F
3. T
4. F
5. T
6. F
7. T