Breathing

Q. A human being normally breathes ___ times per minute.

1. 40
2. 12
3. 72
4. 100

Q.

State whether true or false:
Respiration and breathing are synonymous.

1. Photosynthesis

2. Breathing

Q. Assertion - Difference in the partial pressure of a gas between two systems creates pressure gradient.
Reason - Gas moves from a region of high pressure to the region of low pressure.

1. Both the assertion and reason are true and the reason is the correct explanation of the assertion
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion
3. The assertion is true but the reason is false
4. Both the assertion and reason are false

Q. A human being normally breathes ___ times per minute.

1. 40
2. 100
3. 72
4. 12

Q. State whether the following statements are true or false:
Statement 1: Cockroaches breathe air through gills.
Statement 2: Cockroaches have air tubes running down their body called tracheae.
[2 marks]
[Respiration in other organisms]

1. Statement 1: False; Statement 2: False​

2. Statement 1: True; Statement 2: False​

3. Statement 1: False; Statement 2: True

4. Statement 1: True; Statement 2: True​

Q.

The process of expelling air containing more carbon dioxide than the inhaled air is known as _____________.

1. inhalation

2. exhalation

3. breathing

4. respiration

Q. What is the rate of breathing per minute in an adult when he is at rest?

1. 9-12
2. 12-18
3. 21-24
4. 30-33

Q.

The number of times a person breathes in a minute is known as __.

Q.

Breathing is a part of __.

Q.

All living organisms respire.

1. True

2. False