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15
×
Why do arteries have thick layers of muscle tissue?
b) To prevent blood clotting
d) To bear high pressures
c) To stretch and recoil
a) To maintain low pressure
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thief
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5
10
15
20
25
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seesaw
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fairy
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25
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thief
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monster
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magnet
Take 25 points!
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fairy
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5
10
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20
25
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thief
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25
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seesaw
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gold
Win 50 points!
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shark
Other team loses 20 points!
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banana
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15
×
How do arteries differ from veins in terms of pressure?
a) Arteries have higher pressure
d) Both have low pressure
c) Arteries and veins have equal pressure
b) Veins have higher pressure
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15
×
What is the typical cross-sectional area of capillaries compared to arteries?
b) Equal
d) Variable
c) Larger
a) Smaller
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15
×
How is the flow rate of blood through a vessel calculated?
b) By multiplying the blood pressure by the vessel length
c) By dividing the blood volume by the time taken
a) By dividing the blood volume by the vessel diameter
d) By multiplying the vessel diameter by the blood pressure
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15
×
What is the structure of capillary walls?
b) Thin and permeable-allowing liquids/gases to pass through
c) Elastic and stretchy
d) Multilayered
a) Thick and muscular
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15
×
What role do veins play in the circulatory system?
a) They carry blood away from the heart
d) They regulate body temperature
c) They transport blood back to the heart
b) They exchange gases with tissues
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15
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How do capillaries facilitate nutrient exchange with tissues?
a) By contracting and expanding
b) By secreting hormones
c) By having thin walls and high permeability
d) By storing excess blood
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15
×
What is the primary factor influencing the flow rate of blood in capillaries?
a) High pressure
d) Elasticity
b) Low pressure
c) Permeability
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15
×
Which blood vessels have the largest lumens?
b) Capillaries
c) Veins
a) Arteries
d) Arterioles
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15
×
What is the primary function of capillaries in the circulatory system?
c) To store excess blood
b) To exchange gases and nutrients with tissues
d) To carry blood away from the heart
a) To regulate blood pressure
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15
×
What is the function of capillaries?
c) To transport blood back to the heart
a) To carry blood away from the heart
d) To regulate blood pressure
b) To exchange nutrients and oxygen with tissues
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15
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What is the main characteristic of arteries?
a) Thin walls
b) Low pressure
d) Thick, elastic walls
c) Single-cell thick walls
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15
×
What is the primary function of arteries?
b) To regulate blood pressure
a) To transport blood back to the heart
d) To carry blood away from the heart
c) To exchange gases with tissues
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