Biology 30

Central Nervous system(CNS)

the bodies coordinating center for mechanical and chemical actions; made up of the brain and spinal cord.

Peripheral Nervous System(PNS)

all arts of the nervous System, excluding brain and spinal cord, that relays info between the central nervous system and other parts of the body.

Somatic Nerves

voluntary movement = requires the brain.

sensory and motor.

part of peripheral Nervous system

automatic nerves and what two things is it broken down to(slower and faster processes)

Involuntary movement= like blinking, doesn’t require thinking to do it

has sympathetic(faster) and parasympathetic(slower) =sensory and motor

Neuron

conducts nerve impulse(sensory, inter, motor neurons) each organized into tissues called nerves(individual neurons).

Glial cells

non conducting cells

(structural support), nourish neurons, remove waste.

Creates homeostasis

supports and protects neurons.

Dendrites

receive information, conduct impulse towards the cell body.

Axon

Conducts nerve impulses away from cell body to other neurons of effectors

covered with a mylen sheath

produced by the shwann cell

Mylen sheath

fatty protein that acts as an insulator

Shwann cell

special glial cell

creates mylen sheath

nerve regeneration=repair and regrowth

provides support and nutrients.

Cell body

contains nucleus

Mylenated

unmylenated