control of skeletal muscles with conscious effort the end neurons connected to the muscles release the neurotransmitter Acetylcholine, causing myofibrils to contract T HREE T YPES OF M USCLES - Skeletal - Smooth - Cardiac
Involuntarily reaction to a stimulus sensory neuron sends signal to spinal cord; spinal cord sends message to muscle bypasses the brain Evolutionarily evolved for time-sensitive reactions
controls smooth muscles without conscious effort Regulates functions of our internal organs Heavily related to the Endocrine System blood pressure, heart rate, breathing rates, body temperature, digestion/metabolism, water balance, the production of body fluids (saliva, sweat, and tears), urination, defecation, sexual response, etc.
a cluster of neurons with a common purpose somatic ganglia – bundles of nerves connected to skeletal muscles sympathetic ganglia vs parasympathetic ganglia
the sympathetic and parasympathetic systems innervate the same organs but have opposite effects