Gaseous Exchange in Humans

Q.

Explain the role of haemoglobin in the transport of gasses during respiration

Q.

Which of the following muscles contract during normal expiration?

1. Internal intercostal muscles

2. Diaphragm

3. Abdominal muscles

4. None of these

Q.

Why are capillaries so thin?

Q.

Complete the following blanks, regarding lung volumes and capacities.
i. Functional lung capacity (FRC)$⟶$ ERV+RV= ________.
ii. Inspiratory capacity (IC)$⟶$ TV+IRV= ________.
iii. Vital capacity (VC)$⟶$ IC+ERV= ________.
iv. Total lung capacity $⟶$ RV+VC= ________.

1. i. 2, 400 ii. 4, 700 iii. 3, 500 iv. 5, 900

2. i. 5, 900 ii. 2, 400 iii. 3, 500 iv. 4, 700

3. i. 3, 500 ii. 4, 700 iii. 2, 400 iv. 5, 900

4. i. 2, 400 ii. 3, 500 iii. 4, 700 iv. 5, 900

Q. During circulation, oxygen combines with haemoglobin to form .

1. oxyhaemoglobin
2. carboxyhaemoglobin
3. carbaminohaemoglobin

Q.

Why do we need to take deep breath before we sneeze ?

Q.

What happens to oxygen after it enters the lungs

Q.

Which one of the following produces negative pressure within your thoracic cavity:

1. exhalation

2. contraction of the diaphragm muscles

3. relaxation of the muscles between the ribs

4. relaxation of diaphragm muscles

Q. Sort the steps to trace the path of oxygen inside the body.

1. Nose
2. Pharynx
3. Trachea
4. Bronchi
5. Alveoli

Q.

Gaseous exchange occur in all body cells.

1. True
2. False

Q.

The gas which absorbs harmful ultraviolet rays given by the sun.

1. Oxygen

2. Ozone

3. Nitrogen

4. Hydrogen

Q.

During inhalation the diaphragm

1. Contracts and does not flatten

2. Does not contract

3. Contracts and flattens

4. Expands

Q.

Which of the following is/are parts of the respiratory system?

1. Trachea

2. Nasal Cavity

3. Bronchi

4. All of the above

Q.

Exhaled air contains

1. More hydrogen

2. More carbon dioxide

3. More nitrogen

4. More oxygen

Q. Which of the following involves the transportation of gases through blood?

1. Cellular respiration
2. External respiration
3. Internal respiration
4. All of the above

Q.

If a person has lungs problem by which condition of respiration he was passing through ?

Q.

Where in the respiratory system can we find rings of cartilage?

1. Lungs

2. Alveoli

3. Trachea

4. Diaphragm

Q.

Which of these gases are mostly transported by binding to hemoglobin?

1. Oxygen
2. Nitrogen
3. Carbon dioxide
4. Carbon monoxide

Q. Why do we need to exchange oxygen and carbon dioxide?

1. We need $C{O}_2$ to breakdown glucose, of which oxygen is a by-product.
2. We need $C{O}_2$ to breathe and produce oxygen as a byproduct of digestion.
3. We need oxygen to breakdown glucose, of which $C{O}_2$ is a by-product.
4. We need oxygen to breathe and produce $C{O}_2$ as a byproduct of digestion.

Q. Observe figures carefully and answer the following questions. ​


(a) Which process is being tested in the activity?​
(b) What is the result of the activity? Give reasons.​

Q.

State the utility of Oxygen for respiration in living organisms.

Q. Diaphragm is a skeletal muscle, which means it is moved voluntarily. Then how do we breath when we are asleep, as that breathing is involuntary??