Respiration in Humans

Q.

How are the lungs designed in human beings to maximize the area for exchange of gases?

Q.

During inhalation, the diaphragm becomes .....and ribs move ......

1. upwards
2. flat
3. downwards
4. concave

Q.

Why do we feel muscle cramps after heavy exercise?

Q.

The maximum volume of air contained in the lung by a full forced inhalation is called as ______

1. vital capacity

2. tidal volume

3. total lung capacity

4. inspiratory capacity

Q.

The muscular partition between thorax and abdomen _______.

Q.

During inhalation, the diaphragm moves up.

1. True

2. False

Q.

$C_6{H}_{12}{O}_6+6O_2\to 6C{O}_2+6H_{2}O+38ATP$
$C_6{H}_{12}{O}_6\to 2C_2{H}_{5}OH+2C{O}_2+2ATP$
Mention any one difference other than those reflected in the two chemical equations given above.

Q. What is the use of the following in the experiments on respiration? (i) Soda lime

Q. Which type of muscle is found in the bronchi of the lungs and helps in involuntary movements?

1. Skeletal
2. Smooth
3. Cardiac
4. Striated

Q.

An experimental set up is given to demonstrate that CO₂ is given out during respiration. Four students I, II, III and IV made the following observations:

1. Level of water remained the same in both the beaker and delivery tube.
2. Level of water increased in the delivery tube.
3. Level of water gets reduced in both the beaker and the delivery tube.
4. Water ascends in the delivery tube and again flows back into the beaker.

The correct observation is done by student

1. I

2. II

3. III

4. IV

Q.

Give the overall chemical equation for the two kinds of respiration in plants: (i) Aerobic​

Q. Give reasons for:

(ii) Use of lime water in most experiments on respiration.

Q. With regard to the respiratory system and the process of respiration in man, answer the following questions:

(c)Give the overall chemical equation to represent the process of respiration in humans.

Q.

Reason for rising of the water in bent test tube in the set-up of experiment to show that CO₂, is produced during respiration by use of KOH is

1. Water always rises up

2. A vacuum is created in conical flask due to absorption of CO₂, by KOH solution to fill it up as the water rises up in bent tube

3. Water does not rise up in the bent tube

4. Due to KOH solution.

Q.

The specialized cells in the roof of our nose for olfaction are called olfactory___cells.

Q.

Microbes that generally enter the body through nose are likely to affect

1. Gut

2. Lungs

3. Liver

4. Lymph nodes

Q. How do the following structures help in respiration in plants?​ (c) Root hairs……….

Q.

The entrance of trachea is guarded by ___

Q.

Epiglottis guards the opening of oesophagus

1. Eustachian tubes

2. Oesophagus

Q.

Discuss the importance of air.

Q.

The role of nasal chambers in respiration is

1. Entraps harmful particles.

2. Warms the air

3. Adds moisture to the air

4. Gives a sense of smell

Q. Which of the following is not a function of human skeleton?

1. Support andd shape
2. Protection
3. Movement
4. Transport of nutrients

Q.

Energy released during respiration is stored in the cell as ____.

1. ATP

2. NADP

3. AMP

4. ADP

Q. The following two chemical reactions are supposed to indicate a certain process occurring in the green plants under two different conditions:
(a) $C_6{H}_{12}{O}_6+6O_2\to 6C{O}_2+....+38ATP$
(b) $C_6{H}_{12}{O}_6\to .......+2C{O}_2+2ATP$
(iii) What are the conditions under which the two reactions (a) and (b) are occurring?

Q. Lungs in the thoracic cavity is seperated form the abdominal cavity by means of

1. Peritonium
2. Trechea
3. Pleura
4. Diaphragum

Q.

What is human lung?

Q.

What are turbinates? What are their functions?

Q. Co-relate this setup with the working of the human respiratory system. Here rubber sheath represents the diaphragm. Select the events that occur when diaphragm contracts or rubber sheath is pulled.

1. Pressure inside the lungs is reduced.
2. Pressure inside the lungs is increased.
3. Size of lungs increases.
4. Size of lungs decreases.

Q. The process of taking in oxygen rich air is whereas process of giving out carbon dioxide rich air is .

1. inspiration
2. respiration
3. transpiration
4. expiration
5. circulation

Q. Which is the common passage for food and air?