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Physiology Weeks 1-6

TermDefinition
Negative feedback in hormone control Prevents overproduction of hormones to maintain balance.
ATP’s role in muscle contraction Provides energy for the cross-bridge cycle between actin and myosin.
Sliding filament theory Explains muscle contraction as actin and myosin filaments sliding past each other.
Sarcomere The functional unit of a muscle fiber responsible for contraction.
Sympathetic division Prepares the body for stress — “fight or flight.”
Parasympathetic division Promotes relaxation and energy storage — “rest and digest.”
Autonomic nervous system Regulates involuntary functions like heart rate, digestion, and breathing.
Somatic nervous system Controls voluntary movements of skeletal muscles.
Peripheral Nervous System (PNS) Part of the nervous system outside the brain and spinal cord.
Neurotransmitter of sympathetic division Mainly norepinephrine (and epinephrine).
Neurotransmitter of parasympathetic division Acetylcholine.
Created by: user-1991134
 

 



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