Organisation of the Nervous System

Question 1

What are the two parts of the Nervous System?

Accepted Answer

CNS and PNS

Answer

CNS and Somatic

Answer

PNS and Somatic

Answer

Somatic and Sensory

Question 2

What makes up the CNS?

Accepted Answer

brain

Accepted Answer

cranial nerves

Accepted Answer

spinal cord

Answer

spinal nerves that branch from the spinal cord

Answer

autonomous nervous system

Question 3

What makes up the PNS?

Accepted Answer

spinal nerves that branch from the spinal cord

Accepted Answer

autonomous nervous system

Answer

brain

Answer

spinal cord

Answer

cranial nerves

Question 4

glial cells outnumber neurons by about 50 to 1

Accepted Answer

true

Question 5

what two types of cells make up the brain?

Accepted Answer

neurons

Accepted Answer

glial cells

Answer

red blood cells

Answer

white blood cells

Question 6

what do neurons do?

Accepted Answer

are responsible for sending and receiving nerve impulses or signals

Answer

carry messages from organs to the brain

Answer

provide support and nutrition in the nervous system

Answer

maintain homeostasis

Question 7

what do glial cells do?

Accepted Answer

they are non-neuronal cells that provide support and nutrition

Accepted Answer

form myelin

Accepted Answer

maintain homeostasis

Accepted Answer

facilitate signal transmission in the nervous system

Answer

send and receive nerve impulses or signals

Question 8

Label this diagram

Accepted Answer

dendrite

Accepted Answer

cell membrane

Accepted Answer

nucleus

Accepted Answer

myelin sheath

Accepted Answer

node of ranvier

Accepted Answer

schwann cell

Accepted Answer

axon terminal

Accepted Answer

axon

Accepted Answer

cell body

Question 9

what is true for dendrites?

Accepted Answer

receive incoming signals (from another neuron or receptor)

Answer

produce action potential

Answer

contain a nucleus

Answer

touches other neurons

Question 10

where do the signals from one neuron communicate with other neurons?

Accepted Answer

synaptic terminals

Answer

axons

Answer

cell body

Answer

myelin sheath

Question 11

neurons are replaceable and can divide

Accepted Answer

false

Answer

true

Question 12

Are all cells myelinated?

Accepted Answer

no

Answer

yes

Question 13

what is the purpose of myelin?

Accepted Answer

allows electric impulses to transmit efficiently and quickly along the nerve cells

Accepted Answer

is an insulating layer

Answer

slows the speed of nerve transition

Answer

prevents electric impulse transmission

Question 14

glial cells do not propagate neural impulses but provide extremely important supportive and facilitative functions to the nervous system

Accepted Answer

true

Question 15

select the 4 types of neuroglial cells in the CNS

Accepted Answer

astrocytes

Accepted Answer

oligodendro-cytes

Accepted Answer

microglia

Accepted Answer

ependyma

Answer

satellite

Answer

schwann

Question 16

Which glial cell supports and regulates ions?

Accepted Answer

astrocytes

Answer

microglial cells

Answer

ependymal cells

Answer

oligodendrocytes

Question 17

what do microglial cells do?

Accepted Answer

defend, engulf anything that should not be there

Answer

line cavities

Answer

myelinate and protect

Answer

support and regulate ions

Question 18

Oligogendrocytes wrap and insulate by forming a myelin sheath within the CNS. Which glial cells have this function in the PNS?

Accepted Answer

schwann cells

Answer

satellite cells

Question 19

satellite cells surround neuron cell bodies for support. Which glial cell does a similar function in the CNS?

Accepted Answer

astrocytes

Answer

microglial

Answer

ependymal

Answer

oligodendrocytes

Question 20

sensory neurons:

Accepted Answer

transmit impulses from sensory receptors toward the CNS

Answer

impulse moves from CNS to rest of the body

Answer

impulse moves between sensory and motor neurons within the CNS

Question 21

motor neurons:

Accepted Answer

impulse moves from the CNS to the rest of the body

Answer

transmit impulses from the sensory receptors toward the CNS

Answer

impulse moves between sensory and motor neurons within the CNS

Question 22

Interneurons:

Accepted Answer

impulse moves between sensory and motor neurons within the CNS

Answer

transmit impulses from sensory receptors toward the CNS

Answer

impulse moves from the CNS to the rest of the body

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Organisation of the Nervous System

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