Human Physio Autonomic & Somatic Nervous System

Efferent division of PNS

somatic nervous system (SNS), which provides conscious and subconscious control over skeletal muscles.
autonomic nervous system (ANS), which controls visceral funcstions largely outside of our awareness

skeletal muscles

somatic nervous system (SNS), which provides conscious and subconscious control over ________.

visceral functions, outside of our awareness

autonomic nervous system (ANS), which controls _______ largely __________

parasympathetic, sympathetic

Autonomic nervous system contains two branches, _____ and ______

rest

Parasympathetic division is most active at ___

emergency, threatening

Sympathetic division is most active in ______ or ______ situations

two neurons, autonomic ganglion

Autonomic pathways consist of ______ that synapse in an ______

Preganglionic neuron

originates in CNS (spinal cord) and projects to autonomic ganglion outside CNS

Ganglion

sympathetic chain ______ runs along vertebral column

Postganglionic neuron

cell body in ganglion and projects axons to target tissue/effector organ

Target tissue

cardiac muscle, smooth muscle or glands

Sympathetic

Originate in the thoracic and lumbar region of spinal cord

Parasympathetic

Originate in brain stem (cranial nerves) and sacral region

Sympathetic

Short preganglionic neurons
Long postganglionic neurons to target tissues

Parasympathetic

Long preganglionic neurons
Short postganglionic neurons

on or near

Parasympathetic's ganglia is _____ target organs

spinal cord

Sympathetic's ganglia close to ______

ACh (Acetylcholine)

_____ is released between pre- and post-ganglionic autonomic neurons

acetylcholine and norepinephrine

Sympathetic pathways use ______ and _____

Parasympathetic

_______ pathways use acetylcholine.

Sympathetic division

________ is most active in emergency or threatening situations.