Respiratory and Circulatory System Quiz

What is the word equation for aerobic respiration?

• Oxygen + Carbon dioxide → Water + Glucose

• Glucose + Oxygen → Carbon dioxide + Water

• Glucose + Water → Carbon dioxide + Oxygen

• Carbon dioxide + Water → Glucose + Oxygen

What is the main function of the human respiratory system?

• To digest food and absorb nutrients

• To pump blood around the body

• To enable gas exchange between body and surroundings

• To produce energy directly

Which part of the respiratory system connects the nose to the lungs?

• Alveoli

• Trachea

• Diaphragm

• Bronchioles

What happens to the diaphragm when we inhale?

• Relaxes and moves upwards

• Contracts and flattens, moving downwards

• Expands outwards

• Stays still

What happens to the ribs when we inhale?

• Move downwards and inwards

• Move upwards and outwards

• Stay in the same position

• Collapse inwards

What happens to the lungs during inhalation?

• They compress and push air out

• They remain unchanged

• They expand as air is drawn in

• They shrink due to diaphragm contraction

What happens to the diaphragm when we exhale?

• Relaxes and moves upwards

• Contracts and moves downwards

• Expands outwards

• They shrink due to diaphragm contraction

Which of the following correctly shows the pathway of air during respiration?

• Nose → Trachea → Bronchi → Bronchioles → Alveoli

• Nose → Alveoli → Trachea → Bronchioles → Bronchi

• Nose → Bronchioles → Trachea → Alveoli → Lungs

• Nose → Diaphragm → Bronchioles → Alveoli

Why can alveoli exchange gases quickly and efficiently?

• They have thick walls and small surface area

• They are surrounded by large bones

• They have thin walls, large surface area, and many blood vessels

• They are made of muscle tissue

Arrange the following steps in the correct order to describe the process of respiration:

1.      Oxygen in the inhaled air passes from the alveolus to the blood in the blood vessels, and carbon dioxide moves from the blood to the alveolus.

2.      The air moves down the trachea, which divides into bronchi, then bronchioles, and finally reaches the alveoli.

3.      When we inhale, air enters the body through the nose.

4.      Carbon dioxide leaves the body when we exhale, while oxygen is carried by the blood to all body cells.

• a.       1 → 2 → 3 → 4

• b.      2 → 3 → 1 → 4

• c.       3 → 2 → 1 → 4

• d.      4 → 3 → 2 → 1