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Circulatory system - Blood Vessels and Blood

Study Slideshow

Which blood vessels carry blood away from the heart?

b) Capillaries

a) Arteries

c) Veins

d) Arterioles

15

What is the function of capillaries?

d) To regulate blood pressure

b) To exchange nutrients and oxygen with tissues

a) To carry blood away from the heart

c) To transport blood back to the heart

15

What is the main characteristic of arteries?

b) Low pressure

a) Thin walls

d) Thick, elastic walls

c) Single-cell thick walls

15

Why do arteries have thick layers of muscle tissue?

b) To prevent blood clotting

c) To stretch and recoil

d) To bear high pressures

a) To maintain low pressure

15

What is the structure of capillary walls?

b) Thin and permeable-allowing liquids/gases to pass through

d) Multilayered

c) Elastic and stretchy

a) Thick and muscular

15

What is the function of veins?

d) To regulate blood pressure

a) To exchange substances with cells

c) To transport blood back to the heart

b) To transport blood away from the heart

15

Why do veins have valves?

b) To prevent blood clotting

d) To prevent backward flow of blood

a) To maintain high pressure

c) To control the flow of oxygen

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What is the primary factor influencing the flow rate of blood in capillaries?

d) Elasticity

c) Permeability

a) High pressure

b) Low pressure

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What is the typical cross-sectional area of capillaries compared to arteries?

a) Smaller

b) Equal

c) Larger

d) Variable

15

Which blood vessels have the largest lumens?

d) Arterioles

c) Veins

b) Capillaries

a) Arteries

15

What is the primary function of capillaries in the circulatory system?

d) To carry blood away from the heart

a) To regulate blood pressure

c) To store excess blood

b) To exchange gases and nutrients with tissues

15

Which blood vessels have the thinnest walls?

a) Arteries

b) Capillaries

d) Venules

c) Veins

15

What is the purpose of elastic fibers in arteries?

a) To regulate blood flow

b) To maintain low pressure

c) To stretch and recoil

d) To prevent blood clotting

15

What role do veins play in the circulatory system?

b) They exchange gases with tissues

a) They carry blood away from the heart

d) They regulate body temperature

c) They transport blood back to the heart

15

What characteristic distinguishes capillaries from other blood vessels?

d) Elasticity

c) High pressure

b) Permeability - allowing liquids or gases to pass through

a) Thick walls

15

How do arteries differ from veins in terms of pressure?

d) Both have low pressure

b) Veins have higher pressure

a) Arteries have higher pressure

c) Arteries and veins have equal pressure

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Bianco's Circulatory system - Blood Vessels and ...