Chp. 15 - Nervous Tissue Histology Flashcards Preview

BIOL 2311 Lab - A&P I > Chp. 15 - Nervous Tissue Histology > Flashcards

Flashcards in Chp. 15 - Nervous Tissue Histology Deck (25)
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1

Identify #4-6

4: Nucleolus;

5: Chromatophilic substance or rough endoplasmic reticulum or nissl bodies;

6: axon hillock

2

Identify #1-3

1: Dendrites

2: Cell body;

3: Nucleus

3

Identify #7-9

7: initial segment of axon;

8: neurilemma (sheath of Schwann);

9: Schwann cell (one internode)

4

Identify #10-12

10: Myelin sheath gap (nodes of Ranvier);

11: Terminal branches;

12: Axon terminals

5

Identify A-D.

A: Synaptic vessels;

B: synaptic cleft;

C: ion channel (closed);

D: ion channel (open)

6

Identify E, F, L

E: postsynaptic membrane;

F: axon terminal of the presynaptic neuron;

L: axon of presynaptic neuron

7

Identify G-K

G: 

H: 

I:

J:

K:

8

Name #1-3

1: axon;

2: myelin sheath;

3: endoneurium???

9

Name #4-6

4: blood vessels;

5: epineurium;

6: perineurium

7: endoneurium

 

10

a neuron that does not have any neural impulses

resting neuron

11

The difference in electrical charge across the plasma membrane is called _____. Hence, the membrane is said to be ______.

resting membrane potential; 

polarized

12

What in the membrane maintains the difference in electrical charge established by diffusion of ions?

sodium-potassium pump

13

The resting membrane potential can be measured with a _______.

voltmeter

14

The neuron receives an adequate impulse known as the ______.

threshold stimulus

15

The action potential follows the _________ law, in which the neuron membrane either depolarizes 100% or not at all.

all-or-none

16

In neurons, the action potential is also called a ________.

nerve impulse

17

When the nerve impulse reaches the axon terminal, it triggers the release of neurotransmitters into a gap, known as the _________.

synaptic cleft

18

Identify the type of glial cell shown. 

astrocyte

 

19

Identify the indicated part of a nerve. 

fascicle

 

20

Identify the indicated part of a synapse. 

presynaptic membrane

 

21

In the PhysioEx exercise, what was the effect of curare on the nerve?

inhibition

 

22

Identify the indicated part of a neuron. 

axon terminals

 

23

Identify the type of glial cells shown. 

ependymal cell

 

24

Identify the indicated part of a nerve. 

axon

25

Identify the indicated part of a neuron.

nissl bodies

 

chromatophilic substance