Chapter 12 Flashcards Preview

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Flashcards in Chapter 12 Deck (28):
1

What does the endocrine system do?

communicates with hormones

2

What does the nervous system do?

communicates with electrical and chemical means

3

What do sense organs do?

receive info about changes and transmits cody messages

4

What are issue commands?

sends commands to muscles and glands

5

What are the two types of nervous systems?

central and peripheral

6

What is the central nervous system?

brain and spinal cord

7

What is the peripheral nervous system?

everything except brain and spinal chord

8

What do afferent neurons do?

conduct signals towards CNS

9

What do motor efferent neurons do?

send signals out to muscles and gland cells

10

What is sympathetic division?

arouses the body for action

11

What is parasympathetic division?

calms down the body

12

What is the soma of a neuron?

the control center of the neuron

13

What is the dendrite of the neuron?

branches coming off of the soma

14

What is the axon?

nerve fiber that travels away from the soma

15

Whats a multipolar neuron?

one axon and multiple dendrites

16

What is a bipolar neuron?

one axon and one dendrite

17

What is a unipolar neuron?

single process away from soma

18

What is an anaxonic neuron?

many dendrites but no axon

19

How many neurons to a nervous system?

one trillion

20

What is the ratio from neuroglia to neurons?

50 to 1

21

What are oligodendrocytes?

form myelin sheaths

22

What are ependymal cells?

line the cavities of the brain

23

What are the for types of neuroglia?

microglia, astrocytes, schwann cells, and satellite cells

24

What is the myelin sheath?

insulating layer around nerve fiber

25

What does the regeneration tube do?

guides growing sprout back to target cells

26

What is resting membrane potential?

charge difference acres the plasma membrane

27

What is action potential?

dramatic change

28

What are local potentials?

disturbances in membrane potential