Question 1

1. Why is the respiratory system very important to the body?

Accepted Answer

b. It consists of body parts that help the body receive oxygen.

Answer

a. It enables carbon dioxide to get into the body.

Answer

c. It helps distribute carbon dioxide to the blood.

Answer

c. It helps distribute carbon dioxide to the blood.

Question 2

2. How does oxygen in the air get into the blood?

Accepted Answer

d. through the tiny capillaries

Answer

c. through the mouth

Answer

b. through the throat

Answer

a. through the nose

Question 3

3. What will happen to the cells of the body when there is absence of oxygen?

Accepted Answer

d. The cells will die.

Answer

b. The cells will be inactive.

Answer

a. The cells will continue to grow and multiply

Answer

c. The cells will survive.

Question 4

4. How can you keep your heart strong?

Accepted Answer

b. doing activities like playing outside, riding your bike, and swimming

Answer

a. eating heart-shaped candy

Answer

c. smoking

Answer

d. sleeping 18 hours a day

Question 5

5. What are tubes that carry blood back to the heart?

Accepted Answer

b. veins

Answer

a. arteries

Answer

c. pipes

Answer

d. tubes

Question 6

6. Which of the following describes the correct passage of blood originating from the left leg?

Accepted Answer

d. Vena cava → right atrium → right ventricle → lungs → left atrium →left ventricle → aorta

Answer

a. Vena cava → left atrium → right atrium → lungs → left ventricle →right ventricle → aorta

Answer

c. Vena cava → left atrium → left ventricle → lungs → right atrium →right ventricle → aorta

Answer

b. Vena cava → right atrium → left atrium → lungs → right ventricle →left ventricle → aorta

Question 7

7.What is the functional unit of the nervous system?

Accepted Answer

b. neurons

Answer

a. brain

Answer

c. muscles

Answer

d. bones

Question 8

8. What controls and coordinates the activities of the whole nervous system?

Accepted Answer

d. brain

Answer

c. nervous system

Answer

a. central nervous system

Answer

b. sympathetic nervous system

Question 9

9. Which of these is not a function of the peripheral nervous system?

Accepted Answer

d. delivers oxygen to the different parts of the body

Answer

a. collects information from the sense organ

Answer

c. delivers decisions to the body part which will perform the action

Answer

b. transmits information to the central nervous system

Question 10

10. How do sympathetic and parasympathetic nerves work?

Accepted Answer

b. When the sympathetic nerve produces an effect, the parasympathetic nerve produces an opposite action.

Answer

a. When the sympathetic nerve produces an effect, the parasympathetic nerve produces the same effect.

Answer

d. They allow messages to pass through them freely.

Answer

c. They work separately

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