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Flashcards in Chapter 12 Deck (28)
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1
Q

What does the endocrine system do?

A

communicates with hormones

2
Q

What does the nervous system do?

A

communicates with electrical and chemical means

3
Q

What do sense organs do?

A

receive info about changes and transmits cody messages

4
Q

What are issue commands?

A

sends commands to muscles and glands

5
Q

What are the two types of nervous systems?

A

central and peripheral

6
Q

What is the central nervous system?

A

brain and spinal cord

7
Q

What is the peripheral nervous system?

A

everything except brain and spinal chord

8
Q

What do afferent neurons do?

A

conduct signals towards CNS

9
Q

What do motor efferent neurons do?

A

send signals out to muscles and gland cells

10
Q

What is sympathetic division?

A

arouses the body for action

11
Q

What is parasympathetic division?

A

calms down the body

12
Q

What is the soma of a neuron?

A

the control center of the neuron

13
Q

What is the dendrite of the neuron?

A

branches coming off of the soma

14
Q

What is the axon?

A

nerve fiber that travels away from the soma

15
Q

Whats a multipolar neuron?

A

one axon and multiple dendrites

16
Q

What is a bipolar neuron?

A

one axon and one dendrite

17
Q

What is a unipolar neuron?

A

single process away from soma

18
Q

What is an anaxonic neuron?

A

many dendrites but no axon

19
Q

How many neurons to a nervous system?

A

one trillion

20
Q

What is the ratio from neuroglia to neurons?

A

50 to 1

21
Q

What are oligodendrocytes?

A

form myelin sheaths

22
Q

What are ependymal cells?

A

line the cavities of the brain

23
Q

What are the for types of neuroglia?

A

microglia, astrocytes, schwann cells, and satellite cells

24
Q

What is the myelin sheath?

A

insulating layer around nerve fiber

25
Q

What does the regeneration tube do?

A

guides growing sprout back to target cells

26
Q

What is resting membrane potential?

A

charge difference acres the plasma membrane

27
Q

What is action potential?

A

dramatic change

28
Q

What are local potentials?

A

disturbances in membrane potential