Exam 2: BIOS 255 / BIOS255 (Latest 2025/ 2026 Update) Anatomy and Physiology III Questions with Verified Answers| 100% Correct | Graded A -Chamberlain.

Exam 2: BIOS 255 / BIOS255 (Latest 2025/
2026 Update) Anatomy and Physiology III
Questions with Verified Answers| 100%
Correct | Graded A -Chamberlain.
Question:
what do valves do??
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Answer:

prevent back flow of blood
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Question:

what is an artery?
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Answer:

blood vessels that transports blood AWAY from the heart and TOWARDS
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the capillaries
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Question:

are arteries oxygen rich or oxygen poor??
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Answer:
oxygen rich i,-

,Question:

what is a vein??
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Answer:

vessels that drain blood from the capillaries and transport it TOWARDS
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the heart
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Question:

are veins oxygen rich or oxygen poor??
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Answer:
oxygen poor i,-




Question:

what is a capillary??
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Answer:

microscopic vessel that allows for the exchange of substances between
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blood and tissues
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Question:

,what are capillaries composed of??
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Answer:

layer of endothelium and a basement membrane
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Question:

what are elastic arteries composed of??
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Answer:

more elastic fibers than smooth muscle
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Question:

what do elastic arteries do??
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Answer:
conduct blood from the heart to distant muscular arteries
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Question:

why do elastic arteries stretch??
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Answer:

to accommodate blood being ejected from the ventricle
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, Question:
what do muscular arteries consists of??
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Answer:

multiple layers of smooth muscle
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Question:
what do muscular arteries do??
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Answer:

allow vessels to vasodilate and vasoconstrict to regulate distribution of
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blood




Question:

what do arterioles do?
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Answer:

deliver blood to the capillaries where nutrient and gas exchange occur
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Question:

what do arterioles consists of?
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Answer:
attached to capillary beds, pre capillary sphincter
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