Examlex
Explain how the Constitution is still relevant in the early twenty-first century.
Stimulation
The activity of promoting or encouraging a physical or biological response through external or internal factors.
All-or-none
A principle stating that the strength of a response of a nerve cell or muscle fiber is not dependent on the strength of the stimulus. If a stimulus is above a certain threshold, a nerve or muscle fiber will fire.
Acetylcholine Agonist
A substance that mimics the action of acetylcholine, a neurotransmitter involved in memory and muscle contraction.
Acetylcholine
A neurotransmitter involved in many functions, including muscle movement, heart rate, memory, and learning.
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