intro to nervous system

It helps the body maintain homeostasis.

It produces hormones for growth.

It digests food for energy.

It stores calcium in bones.

CNS includes the brain and spinal cord, while PNS includes nerves connecting CNS to the rest of the body.

CNS includes only the brain, while PNS includes only the spinal cord.

CNS controls voluntary actions, while PNS controls involuntary actions.

CNS is found only in the head, while PNS is found only in the limbs.

Neurons

Neuroglial cells

Blood vessels

Muscle fibers

Astrocytes

Microglia

Satellite cells

Oligodendrocytes

Anaxonic neuron

Bipolar neuron

Unipolar neuron

Multipolar neuron

Bipolar neuron

Unipolar neuron

Multipolar neuron

Anaxonic neuron

Fused dendrites and a very long axon

Cell body to one side

Mostly sensory neurons

Multiple dendrites

Step 1

Step 2

Step 3

Step 4

Motor nerve fiber (axon)

Neuromuscular junction

Skeletal muscle fiber

Synaptic terminal

Dendrite

Axon

Myelin sheath

Effector

It produces neurotransmitters

It allows for saltatory conduction

It stores ions

It insulates the axon

It is highly organized and very efficient

It is loosely organized and inefficient

It is only efficient during stress

It does not help maintain homeostasis