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Flashcards in Chapter 27 Deck (135)
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1

Nervous systems receive _______, ______ it, and then _____

1. Sensory Input
2. Interpret it
3. Send out appropriate commands

2

CNS:

Central Nervous Systems

3

What makes up the CNS?

brain and spinal cord

4

PNS stands for?

Peripheral Nervous System

5

is the PNS inside or outside of the CNS?

Outside

6

Sensory Neurons:

signals from sensory receptors to the CNS

7

Interneurons

located entirely in the CNS, integrate information

8

Motor Neurons

Convey signals to effector cells

9

Integration

involves the interpreting and responding to sensory output

10

______ convey signals to effector cells

Motor neurons

11

______________ send signals from sensory receptors to the CNS

Sensory Neurons

12

The two major divisions of the nervous system are the _______________.

central and peripheral nervous systems

13

________ are the functional units of nervous systems

Neurons

14

Dendrites:

Receive Signals

15

Axons:

Send signals

16

Myelin:

Insulates axon for faster signal transmission

17

Stimulus occurs

in skin

18

response occurs

in muscles

19

stimulus changes the

membrane's voltage

20

Membrane voltage is the:

energy of plasma membrane.

21

Membrane voltage depends on the:

charge difference between inside and outside of cell

22

Action Potentials are _____

self propagated in a one way chain reaction along a neuron

23

Action Potential is caused by a _____

strong stimulus

24

Action potential allows ______:

one cell to communicate with the next cell in the circuit

25

Neurons communicate at _____

synapses

26

Synapses are:

junctions where signals cross between cells

27

Neurotransmitter:

a chemical signal that can cross the space between cells

28

A variety of small molecules function as:

neurotransmitters

29

Acetylcholine:

Neurotransmitter. Controls muscle function.

30

Biogenic amines

Neurotransmitters. serotonin and dopamine, which affect sleep, mood, and attention.