Neuron & Neuromuscular Junction

Question 1

Nucleus

Answer 1

a special type of cell organelle that acts as the cell’s “control center”. It contains the cell’s genetic information in the form of DNA chemicals packaged into chromosomes

Question 2

Dendrites

Answer 2

slender branches of the neuron that transmits nerve impulses from other cells or sensory systems

Question 3

Axon

Answer 3

along fiber of the neuron that acts somewhat like a fiber-optic cable, carrying outgoing messages

Question 4

Node of Ranvier

Answer 4

a small gap in the myelin sheath where the axon is exposed

Question 5

Terminal branches

Answer 5

branch-like endings of an axon that has specialized endings that release neurotransmitters

Question 6

Synaptic knobs

Answer 6

communicates with a dendrite or cell body of another neuron

Question 7

Schwann cell

Answer 7

wraps around the axons, covering the nerve fibers that form the myelin sheath

Question 8

Schwann cell nucleus

Answer 8

a special type of cell organelle in the Schwann cell that acts as the cell’s “control center”. It contains the cell’s genetic information in the form of DNA chemicals packaged into chromosomes

Question 9

Myelin sheath

Answer 9

formed by Schwann cell membranes; is an electrical insulator and aids in transmission of nerve impulses

Question 10

Cleft

Answer 10

the space between two neurons or a neuron and another cell where neurotransmitters cross

Question 11

Muscle fiber

Answer 11

a single muscle cell; when activated by a nerve, it increases the tension within the muscle

Question 12

Acetylcholine sacs

Answer 12

acetylcholine is a neurotransmitter, a small molecule that plays a role in transmitting signals along neurons; stored in sacs

Question 13

Cell body (cyton)

Answer 13

The part of the nerve cell that contains the nucleus but does not incorporate the dendrites or axon