Nervous System** Flashcards Preview

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Flashcards in Nervous System** Deck (77)
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1

What are the 3 functions of the nervous system?

Major controlling, regulatory, and communication, keeps us in touch with the internal and external environment, responsible for maintaining and regulating homeostasis

2

What are the 2 parts of the nervous system?

CNS and PNS

3

All nerves of the body residing outside of the brain and spinal cord

PNS

4

Consists of brain and spinal cord

CNS

5

Skeletal system

Somatic

6

Smooth muscle, cardiac muscles, glands

Autonomic

7

Contains the nucleus and most of the cytoplasm

Cell body

8

Projections that bring impulses into the neuron

Dendrite

9

Long projection that carries impulses away form the neuron

Axon

10

Insulating layer produced by Schwann cells

Myelin Sheath

11

Sheath formed form Schwann cells on the exterior of some axon

Neurlilemma

12

Gaps between Schwann cells

Nodes of Ranvier

13

Junction between 2 communicating neurons

Synapse

14

Has many processes and part of brain or spinal cord

Multipolar neuron

15

2 processes; eyes nose, ears

Bipolar neuron

16

1 process; outside the brain and spinal cord

Unipolar neuron

17

Carry impulses from the body part into the brain or spinal cord

Sensory neuron

18

Most common type of neuron that communicates from one neuron to the other; relays information

Interneurons

19

Carry nerve impulses out of brain or spinal cord to effectors (glands or muscles)

Motor neuron

20

Support neurons and phagocytize bacterial cells and cellular debris, part of the immune system

Microglial cells

21

Where are microglial cells found?

CNS

22

Provide insulating layers of myelin around axons within brain and spinal co

Oligodendrocytes

23

Structural support, join parts by their abundant cellular processes, help regulate concentrations of nutrients and ions within tissue

Astrocytes

24

Where are oligodendrocytes found?

Align along nerve fibers

25

Where are astrocytes found?

between neurons and blood vessels

26

Specialized epithelial cells in the CNS that produce CSF

Ependymal cell

27

Where are ependymal cells found?

brain and spinal cord

28

Forms a myelin sheath around axons

Schwann cells

29

Where are Schwann cells found?

PNS

30

Brings impulse to synapse

Presynaptic neuron