Georgia Science Grade 7

Chapter 19: Circulation

CRCT Practice

1
Which is a function of blood?
A)carry saliva to the mouth
B)excrete salts from the body
C)transport nutrients and other substances to cells
D)remove lymph from around cells
2
Which activity caused Ashley's pulse to be less than 100 beats per minute?

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A)Activity 2
B)Activity 3
C)Activity 4
D)Activity 5
3
A reasonable hypothesis based on these data is that during Activity 2, Ashley was probably

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A)sprinting.
B)marching.
C)sitting down.
D)walking slowly.
4
Which is an artery?
A)left ventricle
B)aorta
C)superior vena cava
D)inferior vena cava
5
What problem might Mrs. Stein have?

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A)low oxygen levels in tissues
B)inability to fight disease
C)poor blood clotting
D)irregular heart beat
6
If Mr. Chavez cut himself, what might happen?

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A)minimal bleeding
B)prolonged bleeding
C)infection
D)quick healing
7
Which lymphatic organ protects your body from harmful microorganisms that enter through your mouth?
A)spleen
B)thymus
C)node
D)tonsils
8
Which activity contributes to cardiovascular disease?
A)smoking
B)jogging
C)sleeping
D)balanced diet
9
Where does blood low in oxygen enter first?
A)right atrium
B)left atrium
C)left ventricle
D)right ventricle
10
Which is NOT a part of the lymphatic system?
A)lymph nodes
B)valves
C)heartlike structure
D)lymph capillaries
11
What might happen if there were a blood clot blocking vessel B?
A)Blood could not be oxygenated.
B)Waste gas would not be removed from the blood.
C)Blood would not reach the lungs.
D)Oxygen and nutrients would not reach the heart.
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