2.3

Question 1

What is the difference between the central and peripheral nervous system?

Answer 1

The CNS is made up of the brain and spinal cord, it sends out orders to the body. The PNS consists of the different nerves that branch off from the brain and spine

Question 2

Describe the different parts of the peripheral nervous system

Answer 2

The sensory division is made of afferent neurons that pick up sensory information from outside stimuli and send impulses to the brain about that information. The motor division uses efferent neurons to send impulses from the brain to the muscles and glands of the body to tell them to move

Question 3

afferent nerves vs efferent nerves

Answer 3

Afferent neurons are sending impulses to the brain from the body and outside stimuli, while efferent neurons send impulses from the brain to the rest of the body to control movement and more

Question 4

somatic ns vs autonomic ns

Answer 4

The somatic nervous system includes voluntary movements in your skeletal muscles and five senses. The autonomic nervous system controls involuntary actions, this is what keeps you breathing and digesting food

Question 5

2 divisions of autonomic ns

Answer 5

Sympathetic division & parasympathetic division

Question 6

What is the functions of the two different autonomic systems?

Answer 6

The sympathetic division mobilizes your body, it makes your heart beat faster, your eyes dilate, and your breathing increases. The parasympathetic division relaxes your body, it slows your heart rate, increases your digestion, and focuses on saving and storing energy

Question 7

What is a glial cell?

Answer 7

A cell that provides support to the nervous system, providing neurons with nutrients. They are the most abundant cell in the nervous system

Question 8

Dendrites

Answer 8

Extensions of the cell body that receive chemical information from adjacent neurons through receptor sites

Question 9

Nucleus

Answer 9

Contains genetic material including information for cell development and other structures that allow the neuron to function

Question 10

Soma

Answer 10

This is the cell body that contains the nucleus and most organelles

Question 11

Nodes of Ranvier

Answer 11

Gaps in the myelin sheath where the axon is exposed, which helps promote the continuing action potential

Question 12

Axon

Answer 12

The longest part of a neuron, it carries information away from the soma toother cells

Question 13

Myelin Sheath

Answer 13

Insulating layer that increases how fast the action potential travels down the axon and protects the axon from damages

Question 14

Axon Terminal OR Terminal Button

Answer 14

This is at the end of the axon where neurotransmitters are released into the synapse

Question 15

Schwann Cells

Answer 15

Helps produce the myelin sheath.