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Flashcards in CNS Part 2 Deck (119)
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1

Basic functional unit of CNS, how work is done.

Neuron

2

Language of neurons

Action potentials

3

Structural support or CNS

Neuroglia

4

What maintains and buffers ECF, regulates electrolytes, and is involved in signal transmission

Astrocytes

5

What produces myelin

Oligodendroglia

6

What in CNS is involved in Immunity and presents antigen to T cells

Microglia/ latent phagocytes

7

What lines ventricles and produces CSF

Ependymal cells

8

What produces myelin in PNS.

Schwann cells

9

1 Schwann cell per ___. 1 ___ can myelinate several axons in CNS

Axon. Oligodendrocyte

10

What is structural support in PNS

Satellite cells

11

Input directly goes to __ or to __

Dendrites or soma

12

Impulses only travel in one direction because of what

Refractory period

13

Excitatory comes on __, inhibitory mainly on ___. But there are exceptions

Dendrite, soma

14

Axon hillock is dense in __ __. Easier to reach thresholds here than __, which needs more __

Sodium channels, soma, inputs

15

Inter neurons have __ axons

Small

16

Unipolar neurons more common in what

Intervertebrates

17

Pseudo unipolar neurons found in __ __ __, __ neuron. Axon comes straight out and goes to __ __ directions

Dorsal root ganglion, sensory. Two different

18

__ neurons common in nose and eye, sensory organs

Bipolar

19

___ neurons are motor neurons

Multipolar

20

Major neuron types of cerebral cortex: __ cells and __ or __ cells

Pyramidal
Stellar or granule

21

Pyramidal cells are __% of cerebral cortex
__ amino acid: __ or __

75
Excitatory, glutamate, aspartate

22

Stellate or granule cells are __% __
___ amino acid: __ or __
Most are ___: ___

25, interneurons,
Excitatory, glutamate or aspartate
Inhibitory, GABA

23

Anesthetic agents work by enhancing what

GABA

24

GABA works by passing ___, brings __ inside of cell. ___ cell further

Chloride, negative, depolarizes

25

__ ___ get things from cell body to pre-synaptic terminal

Calcium microfilaments

26

__ and __ can move quickly because of microfilaments

Mitochondria and vesicles

27

__ move slowly

Proteins

28

2 major proteins: ___ from spinal cord to foot. __ moves proteins back up from axon terminus to cell body. Both are __ and use __

Kinesins
Dynein
ATP
Microtubules

29

Rely on __ to keep ions and neurotransmitters in balance. ___ critical for normal neuronal function

Neuroglia
Astrocytes

30

___ speed conduction

__ can produce glial scars, which is why people with __ __ __ don't recuperate

Oligodendrocytes

Astrocytes, spinal cord injury