7.2b Neurons

Question 1

highly specialized to transmit messages (nerve impulses) from one part of the body to another

Answer 1

Neurons (nerve cells)

Question 2

metabolic center of the neuron

Answer 2

Cell Body

Question 3

Parts of the Cell Body:

rough ER (protein synthesis)

Answer 3

Nissl bodies

Question 4

Parts of the Cell Body:

(intermediate filaments that are important in maintaining cell shape) are particularly abundant in the cell body

Answer 4

Neurofibrils

Question 5

armlike ________ vary in length from microscopic to over 3 feet long, reaching from the lumbar region of the spine to the great toe.

Answer 5

processes, or fibers

Question 6

Neuron processes that convey incoming messages (electrical signals) toward the cell body

Answer 6

dendrites

Question 7

generate nerve impulses and typically conduct them away from the cell body

Answer 7

axons

Question 8

cone like region of the cell body

Answer 8

axon hillock

Question 9

Each axon terminal is separated from the next neuron or its target by a tiny gap called

Answer 9

synaptic cleft

Question 10

an impulse is transmitted from one neuron to another

Answer 10

synapse

Question 11

Most long nerve fibers are covered
with a whitish, fatty material

Answer 11

Myelin Sheaths

fatty material = myelin

Question 12

part of the Schwann cell, external to the myelin sheath

Answer 12

neurilemma

Question 13

myelin sheath is formed by many individual Schwann cells, it has gaps, or indentations

Answer 13

nodes of Ranvier