Nervous System

Question 1

What is the Nervous System composed of?

Answer 1

nerves, the brain, the spinal cord, sensory organs, glial cells, and connective tissue

Question 2

What are glial cells?

Answer 2

They are cells that support the nervous system.

Question 3

What are the functions of the Nervous System?

Answer 3

1. To transmit/receive messages from muscles for movement
2. It acts as a sensory system to protect and enable sensory responses, like smell and sight
3. It coordinates different organ systems and activities to maintain homeostasis

Question 4

What are the divisions of the Nervous System?

Answer 4

CNS (central nervous system) and PNS (peripheral nervous system)

CNS - brain and spinal cord
PNS - nerves that extend from the brain (Cranial nerves) and spinal cords (spinal nerves)

Question 5

What are neurons?

Answer 5

They are nerve cells.

Question 6

What is the function of a neuron?

Answer 6

A neuron’s function is to send and receive electrical impulses, which is the basis of the body’s communication.

Question 7

Why is an insulator needed for a neuron?

Answer 7

Neurons need an insulator so that their impulse doesn’t spread.

Question 8

What are the 3 types of neurons?

Answer 8

1. sensory neuron
2. interneuron
3. motor neuron

Question 9

What type of matter has myelin sheathing?

Answer 9

White matter