Question

1) If the volume of the lungs increases, what happens to the air pressure inside the lungs?

Select one:

a. increases twice the amount of the increase in volume

b. increases

c. remains constant

d. increases and possibly damages the lungs

e. decreases

2) During exercise, which of the following contract for active exhalation?

Select one:

a. rectus abdominis and internal intercostal muscles

b. pectoralis major and serratus anterior muscles

c. diaphragm and internal intercostal muscles

d. rectus abdominis and diaphragm muscles

e. diaphragm and external intercostal muscles

3) All of the following are matched correctly EXCEPT

Select one:

a. Inhalation at rest, Diaphragm

b. Exhalation at rest, Elasticity

c. Exhalation when exercising, Rectus abdominis

d. Inhalation at rest, Internal intercostals

e. Inhalation when exercising, Sternocleidomastoid

4) What would cause vasodilation in the lungs?

Select one:

a. Parasympathetic innervation

b. Asthma

c. Decreased oxygen pressure

d. Breath-hold

e. Increased oxygen pressure

Answer 1

Ans.1. Option E is the correct answer.

EXPLANATIONS:- If the volume of the lungs increases the pressure of the air inside the lungs decreases. As a result of the decrease in air pressure in the lungs, the air will move from outside to the lungs. So inhalation occurs .

Ans.2. Option A is the correct answer.

EXPLANATIONS:- During exercise, rectus abdomins and the internal intercostal muscle contract. Due to there contraction the diaphragm become dome shaped and volume of the lungs decrease. It will increase the air pressure inside the lungs and expiration occurs.

Ans.3. Option D is the correct answer.

EXPLANATIONS:- During inhalation at rest, external intercostal muscle play a role. They will contract. Internal intercostal muscles do not play role.

Ans.4. Option B is the correct answer.

EXPLANATIONS:- Asthma cause vasodilation in the lungs. Due to vasodilation, there will be fluid in the alveoli and it will cause in breathing problems. It is due to the mucosal vasodilation.