Upon binding of a single first messenger to a plasma membrane, thousands of second messengers may become activated. This effect is known as
A) receptor down-regulation.
B) receptor up-regulation.
C) amplification.
D) humoral stimuli.
E) synergism.
C
Anatomy & Physiology
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The spermatogenic cells that line the seminiferous tubules produce sperm
Indicate whether the statement is true or false
Anatomy & Physiology
The lining of the uterus is also referred to as the __________.
Fill in the blank(s) with the appropriate word(s).
Anatomy & Physiology
Light is a crucial factor in regulating circadian rhythms
Indicate whether the statement is true or false
Anatomy & Physiology
A substance that dissociates in water, releasing hydrogen ions, is a(n)
A. salt. B. protein. C. acid. D. base.
Anatomy & Physiology