Chapter 12 (Nervous System) Flashcards
(Sensory) afferent means _
going towards
(Motor) efferent means _
going away from
Ganglia are __
a swelling of a nerve body
Neurons don’t replicate so they are _
amitotic
motor neurons have lots of
dendrites
Glial cells are _
nonexcitable
Microglial cells _
clean up things that aren’t supposed to be there
Action potential involves
depolarization and repolarization
1) resting
2) nerve signal
3)open voltage gated channel
4) repolarized
5) resting RMP
6) Hyperpolarized (still Na and K pumped out… as K closes it goes back to RMP)
refractory period is
amount of time where stimulus won’t cause an action potential
Salfactory (mylinated) conduction is faster than __
continuous
memorize
memorize
(Structural Organization 3or4) Subtypes are __
Multipolar neuron (many dendrites 1 axon)
Bipolar(1 dendrite, 1 axon)
Unipolar (1 process….central and peripheral)
Anaxonic (no axons)
The two subtypes of unipolar are _
1) Central
2)Peripheral (sending action potentials)
There are 2 functional organizations which are _
1) Sensory N.S. (afferent)
2)Motor N.S. (efferent)
Sensory N.S. consists of __(2)
1) Somatic sensory (conscientiously recieve)
2) Visceral Sensory
Motor N.S. consists of _(2)
1)Somatic motor (conscience act)
2) automatic motor
3 things comprise a nerve, they are _
1) Endoneurium (wraps individual axon…smallest)
2)Perineurium (wraps fascicle…medium size)
3)Epineurium (encloses entire nerve….largest)
How many cranial nerves are there?
12
(Nerves) The two types of transport are _
1) Anterograde (from cell body to synaptic knobs)
2)Retrograde (from far away place to cell body)
