4. How can you keep your heart strong?
a eating heart-shaped candy
b. doing activities like playing outside, riding your bike, and swimming
c. smoking
d sleeping 18 hours a day
5. What are tubes that carry blood back to the heart?
a arteries
b veins
C pipes
d. tubes
6. Which of the following describes the correct passage of blood originating from the left leg?
a Vena cava - left atrium - right atrium - lungs-
left ventricle right ventricle aorta
b. Vena cava right atrium - left atrium - lungs-
right ventricle-left ventricle aorta
c. Vena cava left atrium left ventricle → lungs → right atrium-right ventricle → aorta
d. Vena cava - right atrium right ventricle lungs
left atrium left ventricle aorta
7. What is the functional unit of the nervous system?
a brain
b. neurons
C muscles
d. bones
8. What controls and coordinates the activities of the whole nervous system?
a. central nervous system
b. sympathetic nervous system
C nervous system
d. brain
a.
9. Which of these is not a function of the peripheral nervous system?
collects information from the sense organ
b. transmits information to the central nervous system
delivers decisions to the body part which will perform the action
d. delivers oxygen to the different parts of the body
C.
10 How do sympathetic and parasympathetic nerves work?
a. When the sympathetic nerve produces an effect, the parasympathetic nerve produces the same
effect
b. When the sympathetic nerve produces an effect, the parasympathetic nerve produces an opposite
action.
c. They work sepa rately​