Upload
dale-compton
View
25
Download
3
Embed Size (px)
DESCRIPTION
PNS PERIPHERAL NERVOUS SYSTEM. Pages 433-435 VOLUNTARY PNS INVOLUNTARY PNS. Voluntary PNS. made up of voluntary SOMATIC nerves - a.k.a. voluntary SENSORY & MOTOR neurons under CONSCIOUS control how you relate with the EXTERNAL environment. Involuntary PNS. - PowerPoint PPT Presentation
Citation preview
PNS PERIPHERAL
NERVOUS SYSTEM
Pages 433-4351. VOLUNTARY PNS2. INVOLUNTARY PNS
Voluntary PNSmade up of voluntary
SOMATIC nerves- a.k.a. voluntary SENSORY & MOTOR neurons
under CONSCIOUS control
how you relate with the EXTERNAL environment
Involuntary PNS also called the Autonomic Nervous System
(the ANS) made up of autonomic (“automatic”)
nerves to your internal glands & organs (heart, lung, liver, etc.)
Unconcious divided into the:
1. SYMPATHETIC NERVOUS SYSTEM=stress system! “fight or flight”!=adrenaline!
2. PARASYMPATHETIC NERVOUS SYSTEM=think PARAmedic keeping you normal / at homeostasis=“rest & digest”
PNS: SENSORY RECEPTORS
highly modified structures on the dendrites of sensory neurons
Examples skin receptors: pain, temp., pressure, etc.
(see handout) nose (called olfactory receptors) tongue (“tastebuds”) *eyes: photoreceptors *ears: hearing & balance receptors