Examlex
In men, testosterone production declines at a rate of about 1 percent per year beginning at about age ______.
Endocrine Glands
Organs in the body that secrete hormones directly into the bloodstream to regulate various bodily functions.
Interstitial Fluid
The fluid that bathes the tissues of the body; also called tissue fluid.
Synapse
The junction between two neurons or between a neuron and an effector (muscle or gland).
GABA
Gamma-Aminobutyric Acid (GABA) is a neurotransmitter in the brain that plays a key role in regulating nerve excitability and anxiety.
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