Chapter 14: Nervous system Flashcards Preview

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Flashcards in Chapter 14: Nervous system Deck (29):
1

Structural breakdown

Central nervous system vs peripheral nervous system

2

functional breakdown

sensory (incoming signals) vs motor (outgoing signals)

3

CNS

brain, brainstem, spinal cord
info consolidation/processing

4

PNS

cranial nerves, attached to brain & brainstem
spinal nerves, attached to spinal cord
carry info to & from CNS (SENSORY VS MOTOR)

5

Organization of INFO to CNS

[COLLECTING INFO] Somatic or Visceral sensory receptors --> Sensory nervous system --> CNS --> [RESPONDING TO INFO] Motor nervous systtem --> Somatic motor or Autonomic motor

6

Somatic nervous system

Voluntary. Skeletal muscles

7

Autonomic Nervous System

Visceral motor. Involuntary. cardiac muscles, smooth muscles, & glands

8

Sensory (afferent) divison

somatic and visceral fibers

9

Neurons

generate and carry electrical signals

10

Glial cells

protect neurons, regulate ionic balance on tissue, immune functions

11

Neuron structure (5)

dendrites, cell body/soma, axon hillock, axon, & synaptic terminals

12

dendrites

receiving end of neuron
receives signals from other neurons and from receptors

13

soma

signal integration and other fxns

14

axon

signal transmission
passes signal on to other cells by releasing chemical messengers called neurotransmitters

15

bipolar neuron examples

photoreceptors & olfactory receptors

16

unipolar neuron examples

hair cells, taste receptors

17

multiple polar

SKIN, touch receptors, pressure receptors, temperature receptors, & pain receptors

18

sensory neurons

carry info INTO the CNS

19

Motor neurons

carry info OUT to effectors

20

Somotic motor neuron

Lifting weights. Voluntary

21

Autonomic motor neuron

Cardiac muscle (heart). Smooth muscle (organs). Glands (adrenal) Involuntary

22

Somatic sensory neurons

gather info from the environment, external body exterior

23

visceral sensory neurons

gather info from body organs inside body

24

Astrocyte

(Star cells)
end "feet" BLOOD BRAIN BARRIER
divide and form more. surround area of injury.
Know image

25

Microglial cell

Know image?

26

Ependymal cell

Know image?
Brain or spinal cord tissue

27

Oligodendrocyte

wrap myelin around MULTIPLE axons

28

Schwann cell

wrap myelin around axons of peripheral system neurons
similar to oligodendrocyte
Myelin is lipid rich, wrapped around axons
Wrap myelin around ONE axon

29

Satellite cells

ionic balance, pH balance of the environment
congregate around the cell bodies of peripheral system neurons