Which of the following is an increase in the number of receptors making a target cell more sensitive to a hormone?
A. The antagonistic effect
B. Up-regulation
C. Enzyme amplification
D. Down-regulation
E. Negative feedback inhibition
Answer: B
Anatomy & Physiology
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An eye with which of the following conditions does not need a corrective lens to focus the image?
A. Hyperopia B. Myopia C. Presbyopia D. Emmetropia E. Astigmatism
Anatomy & Physiology
The atrioventricular valves permit blood flow
A) in one direction only. B) in both directions. C) in many directions. D) in opposite directions on the right and left. E) None of the answers is correct.
Anatomy & Physiology
Which pigment is responsible for blushing?
A) eumelanin B) pheomelanin C) carotene D) hemoglobin E) melanocyte stimulating hormone
Anatomy & Physiology
The T wave of an ECG corresponds to __________.
Fill in the blank(s) with the appropriate word(s).
Anatomy & Physiology