Introduction to Breathing

Q.

What is second wind

Q.

Where does respiration take place in our body?

Q.

What are the similarities between respiration and combustion?

Q.

How does our body obtain energy?

1. Sunlight

2. Food

3. Water

4. Air

Q.

______ is burnt during respiration to obtain energy.

Q.

Select all the options which are true in case of combustion when compared to respiration.

1. food

2. water

3. energy

4. air

Q.

The process of respiration takes place both in ______and _____.

Q.

Breathing involves only one step called exhalation.

1. True

2. False

Q. The inner lining of the trachea have ciliated epithelium to remove the unwanted particles that may be present in inhaled air.

A. True

B. False

Q. State whether the following statements are true or false.
Statement 1 - Pharynx is the common passage for food and air.
Statement 2 - The opening of the windpipe is covered by epiglottis.

1. False; False
2. False; True
3. True; False
4. True; True

Q.

Differentiate between the following.

Respiration and Combustion.

Q.

Distinguish between respiration and combustion.

Q.

Distinguish between combustion and respiration.

Q.

Give any two similarities between combustion and respiration.

Q.

In cockroaches, air enters the body through

1. lungs

2. gills

3. spiracles

4. skin

Q. Some insects have a network of air tubes called _____ for gas exchange.

1. villi
2. spiracles
3. alveoli
4. tracheae

Q.

During exhalation, the ribs ______.

1. move outwards

2. move downwards

3. move upwards

4. do not move at all

Q.

Give two differences between respiration and combustion.

Q. How does an organism obtain energy?

1. Food
2. Respiration
3. Both A and B
4. Excretion

Q.

E. Differentiate between the terms

1. Respiration and combustion

Q.

During respiration we breathe in __ and breathe out carbon dioxide.

Q.

Breathing can be controlled whereas respiration cannot be controlled by us.

1. True

2. False

Q.

Why do mountaineers carry oxygen with them?

1. There is no air above 5 km.

2. The pressure of air is higher than that on ground.

3. The temperature of air is higher than that on ground.

4. The amount of air available on mountains is less.

Q. The energy stored in food is released during _____.

1. circulation
2. digestion
3. respiration
4. excretion

Q. Accumulation of __ takes place due to which we get cramps in our legs or arms during exercises.

1. oxygen
2. water
3. carbon dioxide
4. lactic acid