When blood flow in a capillary bed decreases in response to locally high oxygen levels, it is caused by

A) intercellular chemicals.
B) angiotensin.
C) autoregulation.
D) neural processes.
E) endocrine processes.


C) autoregulation.

Anatomy & Physiology

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Which protein does NOT belong in a thin filament?

A) myosin B) tropomyosin C) troponin D) actin

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The movement of molecules against their concentration gradient is called

A. facilitated diffusion. B. active transport. C. diffusion. D. endocytosis. E. osmosis.

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Which of the following is not a membranous organelle?

A. Golgi complex B. Mitochondria C. Endoplasmic reticulum D. Ribosome E. Nucleus

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The pyrimidine bases found in DNA are ________ and cytosine

A) cytosine B) adenine C) thymine D) uracil E) niacin

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