Nervous System Review

The Central Nervous System is composed of

• brain and spinal nerves

• brain and spinal cord

• cranial nerves and spinal nerves

• sensory organs and spinal cord

Motor neurons of the somatic nervous system carry messages from the CNS

• to skeletal muscle

• to smooth muscle

• to the brain

• to glands that release hormones

Response of the parasympathetic nervous system

• Stress and Distress

• Fight or Flight

• voluntary

• Rest and Digest

Tags

NGSS.HS-LS1-3

Responses of the autonomic nervous system are

• involuntary targeting smooth muscle and glands

• voluntary targeting skeletal muscle

The structure that surrounds axons of neurons that increases the speed of an impulse is called

• the myelin sheath

• the neuroglial cells

• the dendrite

• the axon terminal

The space between a neuron and another neuron or an effector organ is called

• Node of Ranvier

• neural space

• a longitudinal fissure

• a synapse

What is released from an axon terminal?

• myelin

• neurotransmitters

• hormones

• electrical impulses

The fibers that receive messages and move them to the cell body of a neuron are

• dendrites

• axons

• Schwan cells

• Nodes of Ranvier

A neuron at rest is

• stimulated

• depolarized

• polarized

When an axon is stimulated

• sodium ions rush in making it depolarized

• potassium ions rush in making it depolarized

• sodium ion rush in making it polarized

• potassium ions rush out making it repolarized