Peripheral Nervous System
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Function of Somatic System
Sense and respond to external environment (voluntary and reflex arc)
Function of Autonomic Nervous system
Senses and responds to internal environment (involuntary)
What controls ANS
Hypothalamus and medulla oblongata
ANS- Sympathetic vs Parasympathetic
S- Preps for stress (fight or flight) • Thoracic to lumber of spine • Post ganglionic nerve near spinal cord releases norepinephrine as neuroTM which increase force of muscle contractions PS- Brings back to homeostasis after stress (rest and digest) • Cervical to caurdral part of spine • Post ganglions near organs released acetylcholine as NeuroTM
Compare and Contrast the effect of sympathetic and parasympathetic nerves on the body
Sympathetic: Heart Rate- increases Peristalsis- decreased Glucose- gets released from liver Pupils- Dilated inhibiting tears Bladder Spincter- constricts Blood flow to skin- increases Adrenal Gland- release ephinphrine ParaSympathetic: Heart Rate- decrease Peristalsis- increases Glucoses- stored in liver Pupils- constricts Bladder Spincter- relaxes Blood flow to skin- decreases Adrenal Gland- no effect
Stimulant drugs
Mimics stimulation provided by sympathetic nervous system