Question

TICK (/) THE CORRECT OPTION
When we exhale, the ribs :
1.
(a) move downwards
(b) move outwards
(c) move upwards
(d) do not move at all
2. Through which tubes does air enter the lungs from the windpipe?
(a) bronchi
(b) bronchiolesIsliye toh pyar se hi darte h
(c) alveoli
(d) trachea
3. Anaerobic respiration is seen in :
(a) chameleon
(b) yeast
(c) frog
(d) cockroach
107 Science-7​

Answer 1

Answer:

B

A

V

Explanation:

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thanku

Answer 2

Answer:

1. Move Downwards

2. Bronchi

3. Yeast

Explanation:

1.Exhalation is the flow of the breath out of an organism. In humans, it is the movement of air from the lungs out of the airways, to the external environment during breathing.

During exhalation, your diaphragm relaxes and moves upward into the chest cavity. The intercostal muscles between the ribs also relax to reduce the space in the chest cavity. As they relax they position rib cage downwards and inwards.

As the space in the chest cavity gets smaller, the air rich in carbon dioxide is forced out of your lungs and windpipe, and then out of your nose or mouth.

Hence During exhalation, the ribs move downwards.

So, the correct answer is 'Move downwards'.

Hope This Help....!!!!