Nervous System

Question 1

What is the basic structure of a neuron?

Answer 1

• cell body/soma
• one or more dendrites, recieve info
• one axon to transmit impulses/action potentials
• dendrites/axons=fibres

Question 2

T or F: impulses can be transmitted two ways/both directions in neurons

Answer 2

False

one way transmission only

Question 3

What is the basic function of glial cells and what are some examples?

Answer 3

• for protection and support
• Schwann cells insulate axons with myelin
• Astrocytes pass nutrients between neurons and capillaries
• microglia engulf foreign material

Question 4

____ is the meeting of one neuron’s axon to the dendrite or nerve cell body of another

Answer 4

Synapse

Question 5

What makes up the CNS (central nervous system)

Answer 5

-brain and spinal cord

Question 6

What are fibre bundles and groups of cell bodies called in both the CNS and PNS?

Answer 6

CNS fibres: tract
CNS groupings: nucleus
PNS fibres: nerve
PNS groupings: ganglion

Question 7

How does terminology vary when describing signals to/from voluntary or involuntary muscles?

Answer 7

Voluntary muscle (skeletal and skin)=somatic
Involuntary muscle=visceral
Tissues to CNS= sensory/afferent
CNS to tissues= motor/efferent

Question 8

How would you describe a neuron that carried an impulse from the heart to the CNS?

Answer 8

Visceral sensory neuron

Question 9

How would you describe a neuron that carried an impulse from a skin receptor to the CNS?

Answer 9

Somatic sensory neuron

Question 10

The ventral root in the spine has ____ neurons (somatic and visceral), and the dorsal root has ____ neurons (somatic and visceral).

Answer 10

1. motor

2. sensory

Question 11

The dorsal funiculus carries info __ the brain, while the ventral funiculus carries info ____ the brain

Answer 11

1. to

2. away from

Question 12

______ is the part of the spinal cord with tracts running in both directions carrying info both ways

Answer 12

Lateral funiculus