Anaphy (Nervous System)

a bundle of axons

outside the brain and spinal

cord

originate

from the brain; 12 pairs.

originate from

spinal cord; 31 pairs.

collection of neuron

cell bodies outside the brain

and spinal cord.

extensive network of

axons, and sometimes neuron

cell bodies, located outside

CNS.

supportive cells

with many functions.

transmits action

potentials from receptors

toward the CNS.

transmits action

potentials from CNS to

effectors (muscles,

glands).

from CNS to skeletal muscles.

Voluntary; single neuron system.

from CNS to smooth muscle,

cardiac muscle and certain glands.

Subconscious or involuntary

control.

Prepares body

for physical activity.

Regulates

resting functions.

plexuses within the

wall of the digestive tract

or soma: typical cell

functions such as protein

synthesis and house

keeping; contain Nissl

bodies (rough E R).

cell extensions of the

cell body that receive

information from other

neurons or sensory

receptors

arises from axon hillock

of the cell body then

becomes the initial

segment; part of trigger

zone where action

potentials are generated

has many dendrites and an axon

has a dendrite and an axon

appears to have an axon and no dendrites

has multiple dendrites but no axon

Secrete cerebrospinal

fluid (CSF)

Input travels along one pathway.

many converge and synapse with smaller

number of neurons.

small number of presynaptic neurons synapse

with large number of postsynaptic neurons.

outputs cause reciprocal activation.

neurons stimulate several

neurons in parallel organization, which converge upon a common output

cell. for example, complex data processing in brain.