Chapter 3 pt. 1 Flashcards Preview

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Flashcards in Chapter 3 pt. 1 Deck (33):
1

What is the difference neurons and glia?

Neurons, receive and transmit information to other cells.
Glia, support cell (structurally and functionally!)
Waste management
Provide insulation (i.e., myelin sheath)
10 times more numerous than neurons but 1/10 the size

2

Glia is 10 times more numerous than ________ but 1/10 the size

neurons

3

______ is 10 times more numerous than neurons but 1/10 the size

Gila

4

What are the functions of the Glia?

- Support cell (structurally and functionally!)
- Waste management
- Provide insulation (i.e., myelin sheath)
- 10 times more numerous than neurons but 1/10 the size

5

What is the goal of the nervous system?

send and receive information

6

The nervous system is generally composed of what two primary kinds of cells?

1. Neurons
2. Glia

7

Neuron structure: Cell body (orsoma) contains the ________ and other structures found in most cells.

nucleus

8

Neuron structure: ____ ______ (orsoma) contains the nucleus and other structures found in most cells.

cell body

9

Neuron structure: Cell body (________) contains the nucleus and other structures found in most cells.

orsoma

10

Neuron structure: ___________ receives information (i.e., charged ions) and sends to cell body.

dendrites

11

Neuron structure: Dendrites receives __________ (i.e., charged ions) and sends to cell body.

information

12

Neuron structure: Dendrites receives information (i.e., charged ions) and sends to ____ ______.

cell body

13

Neuron structure: Dendrites receives information (i.e., ________ ____) and sends to cell body.

charged ions

14

Neuron structure: When it comes to dendrites the greater the ________ _____, the more info it take sin.

surface area

15

Neuron structure: When it comes to dendrites the greater the surface area, the more _____ it take sin.

info

16

Neuron structure: thin fiber of constant diameter, in most cases longer than the dendrites.

Axon

17

Neuron structure: What are the functions of the Axon?

sends information from cell body to the pre-synaptic terminals to communicate with other neurons, glands, or muscles.

18

Neuron structure: Axons are in most cases longer than the __________

dendrites

19

Neuron structure: _______ are in most cases longer than the dendrites

Axons

20

Neuron structure: An axon sends information from ___ _____ to the pre-synaptic terminals to communicate with other neurons, glands, or muscles.

cell body

21

Neuron structure: An axon sends information from cell body to the ____-________ terminals to communicate with other neurons, glands, or muscles.

pre-synaptic

22

Neuron structure: An axon sends information from cell body to the pre-synaptic terminals to _____________ with other neurons, glands, or muscles.

communicate

23

Neuron structure: An axon sends information from cell body to the pre-synaptic terminals to communicate with other ________, ______, or ________.

neurons
glands
muscles

24

Neuron structure: A neuron can have many _________ but only one ______.

dendrites
axon

25

True or False:
Neuron structure: There CAN be many branches off of the axon.

True

26

Neuron structure: There CAN be many _________ off of the axon.

branches

27

Neuron structure: What is the difference between the presynaptic terminal and the postsynaptic terminal?

The presynaptic terminal is the end point of the axon that releases neuro-chemicals (i.e., neurotransmitter).
The postsynaptic terminal is the the dendrite on the receiving cell, contains receptor sites that neurotransmitter can bind to..

28

Neuron structure: insulating material covering axons in many neurons; speeds up communication along the axon.

Myelin sheath

29

The myelin sheath covers what section of a neuron?

it covers the axon

30

Is a myelin sheath a good thing or a bad thing? Why?

It is good, because it speeds up communication along the axon

31

What is a synaptic cleft?

the gap between Neurons

32

neurotransmitters travel through the ________ _______

synaptic cleft

33

little sacs filled with neurotransmitters

vesicles