Nerve Histology

Question 1

All neurons have the same basic structure consiting of…

Answer 1

A. Cell body (Soma)
B. Dendrites
C.Axon
D.Synapse

Question 2

Cell body (Soma):

Answer 2

made up of a SINGLE nucleus, cytoplasm (Perikaryon), and a cytoskeleton

Question 3

Axon

Answer 3

SENDS information.
The long process that can spread electrical impulses

Question 4

What is the name for cystoplasm in a neuron and what does it contain?

Answer 4

Cytoplasm is known as Perikaryon and it contains mitochondria, ribosomes, and an ER.

Question 5

Axon Hillock

Answer 5

the wide base of axon that is connected to cell body

Question 6

Telodendria

Answer 6

finger like branches at the end of axon

Question 7

Dendrites

Answer 7

RECIEVE information.
extened from cell body and makes up about 80-90% of total neuron surface area.

Question 8

Synapse

Answer 8

A cite where a neuron communicates with another cell

Question 9

Pre-Synaptic cell

Answer 9

sends messages (usually a nueron)

Question 10

Post-Synaptic cell

Answer 10

recives messages (a cell or another neuon)

Question 11

neuromuscular junction

Answer 11

synapse between a neuron and a muslce

Question 12

Neuroglandular junction

Answer 12

Synapse between a neuron and a gland

Question 13

Synaptic cleft:

Answer 13

small gap between pre-synaptic cleft and post-synaptic cells

Question 13

What does communication across the synaptic cleft involve?

Answer 13

release of CHEMICAL neruotransmitters from the pre-synaptic terminal.
The release of chemical nerotransmiters is iniated by an Action Potential (AP)

Question 14

what are some properties of neurons?

Answer 14

a. They can transmit electrical signals called impules or Action Potentials
b.They can live a REALLY long time. Up to our entire life
c.They are amitotic (Can’t divide)
d.They have a high metabolic rate; need LOTS of O2 and glucose
*Without O2 they can only live for a few minutes