LESSON 10 FINAL EXAM

somatic sensory

skin, joints, skeletal muscles, special senses

visceral sensory

viscera

somatic motor

“voluntary”

skeletal muscle

autonomic motor

“involuntary”

cardiac muscle

smooth muscle

glands

neurons

excitable cells that transmit nerve impulses

glial cells

non-excitable cells that support and protect the neurons

neuron characteristics

high metabolic rate

longevity

nonmitotic

unipolar neurons

sensory neurons

bipolar neurons

special senses

uncommon

multipolar neurons

most common

motor neurons

interneurons

cell bodies

PNS: ganglia

CNS: gray matter

axons

PNS: nerves

CNS: white matter

astrocyte

control ionic environment

BBB

oligodendrocyte

form myelin sheaths in CNS

microglial cell

macrophages of CNS

ependymal cells

line brain ventricles

satellite cell

protects and regulates nutrients for cells bodies and ganglia

schwann cell

myelinates PNS axons

myelin sheath structure

made by oligodendrocytes in the CNS

Shwann cells in the PNS

white fatty coating

myelin sheath function

supports, protects, and insulates axon

increases speed on conduction

nerves

cable-like bundle of parallel axons

3 connective tissue wrapping

synapses function

sit where neurons communicate with other neurons, muscles, or glands

synapses structure

presynaptic neuron

synaptic cleft

postsynaptic neuron

regeneration?

PNS: potential

CNS: very limited