Introduction

Question 1

How many pairs of spinal nerves are there?

Answer 1

31

Question 2

These are a collection of cell bodies outside the CNS.

Answer 2

Ganglia

Question 3

These are a collection of cell bodies in the brain.

Answer 3

Nucleus

Question 4

What is the difference between white and gray matter in the spinal cord?

Answer 4

White matter- myelinated nerve axons

Gray matter- cell bodies

Question 5

What is the difference between the dorsal root and ventral root?

Answer 5

Dorsal- sensory

Ventral- motor

Question 6

What are the 2 enlargements of the spinal cord? Why are they enlarged?

Answer 6

Cervical and lumbar

More gray matter= more cell bodies of motor neurons for limb movement

Question 7

This is a bundle of axons of similar function.

Answer 7

Tract or fasiculus

Question 8

This is a site where a tract crosses the midline.

Answer 8

Decussation

Question 9

Which types of neurons exist for the sympathetic and parasympathetic nervous systems?

Answer 9

Sympathetic- catecholarminergic

Parasympathetic- cholinergic

Question 10

Which are the most important NTs for the sympathetic and parasympathetic nervous systems?

Answer 10

Sympathetic- NE

Parasympathetic- ACh

Question 11

Describe the cells, receptors and synapses involved in a parasympathetic neural pathway.

Answer 11

Preganglionic neuron–>ACh–>Nicotinic cholinergic receptor on postganglionic neuron–> ACh–> muscarinic cholinergic receptor on effector organ

Question 12

Describe the cells, receptors and synapses involved in a sympathetic neural pathway.

Answer 12

Preganglionic neuron–> ACh–> Nicotinic cholinergic receptor on postganglionic neuron –> NE –> adrenergic receptor on effector organ

Question 13

What are the 3 functions of the CSF?

Answer 13

Nutrition
Waste removal
Protection

Question 14

What is the difference between gyri and sulci?

Answer 14

Gyri- elevations

Sulci- crevasses

Question 15

True or False. Dendrites and axons are myelinated.

Answer 15

False. Dendrites are NOT myelinated but some axons are.

Question 16

Where are most synapses formed on axons and dendrites?

Answer 16

Dendritic spines

Question 17

Which cells myelinate axons in the PNS?

Answer 17

Schwann cells

Question 18

How many axons does a single PNS glial cell myelinate?

Answer 18

Schwann cells myelinate ONE axon

Question 19

Which cell myelinates axons in the CNS?

Answer 19

Oligodendrocytes

Question 20

How many axons does a CNS glial cell myelinate?

Answer 20

Oligodendrocytes myelinate multiple axons

Question 21

How many pairs of cranial nerves are there?

Answer 21

12