3.1-3.3

Question 1

Describe the difference between afferent and efferent nerves

Answer 1

Afferent nerves carry sensory signals to the CNS.

Efferent nerves carry motor signals from the CNS to the skeletal muscles

Question 2

Describe the purpose and components of meninges

Answer 2

The purpose of meninges is to protect the CNS. It is split into 3 protective membranes called the dura mater, arachnoid membrane, and the pia mater

Question 3

List the ventricles in the brain. What is contained within the ventricles

Answer 3

The two lateral ventricles, the third ventricle, and the fourth ventricle.

They are interconnected by a series of openings and thus form a single reservoir

Question 4

Describe the origin and route of cerebrospinal fluid

Answer 4

Thought to be produced by choroid plexuses. Excess fluid is continuously absorbed from the subarachnoid space into large blood filled space which run through the dura mater and drain into the jugular veins of the neck

Question 5

What is the difference between tracts and nerves

Answer 5

Tracts are in the CNS. Nerves are in the PNS

Question 6

The metabolic center of the neuron is called(blank) or (blank)

Answer 6

Cell body or soma

Question 7

Which part of the neuron contains DNA

Answer 7

Nucleus

Question 8

Define Dendrites

Answer 8

Short processes emanating from cell body, receive most of the synaptic contacts from other neurons

Question 9

Define axon

Answer 9

Long,narrow process that projects from the cell body

Question 10

Define buttons

Answer 10

Button like endings of axon branches, which release chemicals into synapses

Question 11

Define synapse

Answer 11

Gaps between adjacent neurons across which chemical signals are transmitted

Question 12

What is the central nervous system made up of?

Answer 12

Brain and Spinal Cord