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Flashcards in Introduction Lec01 Deck (22):
1

What do the oligodendrocyte processes do?

provide electrical insulation for neurons by forming myelin sheath

this speeds up the transmission of AP along an axon (saltatory transmission)

2

which glial cells develop from emybronic ectoderm

oligodendrocytes

astrocytes

3

which glial cell in cns is notable for its small size?

microglia

4

Where are microglia derived from?

from hematopoetic sources

5

what is characteristic about oligodendrocytes?

their limited number of dendritic processes

6

what are the functions of microglia

To provide a protective function to nervous tissue in that they can become phagocytic

7

what are the best predictors of intelligence

Foliation and neuronal density

8

describe the appearence of sensory neurons

long dendrites, short axons

9

describe the appearence of motor neurons

long axons, short dendrites

10

what types of support do astrocytes provide to neurons

metabolic and mechanical

11

where are interneurons found

only in the CNS

12

In an astrocyte, what does the long cytoplasmic processes do?

bridge neurons and capillary endothelial cells;

13

free nerve endings are most sensitive to

pain and temperature

14

what mechanoreceptors have thicker myelinated surfaces?

: Pacinian and Meissner corpuscles (light touch and vibration), Ruffini corpuscles and Merkel disks (sustained pressure)

15

which mechanoreceptors are involved with light touch

pacianian and meissner

16

which mechanoreceptors are involved with sustained pressured

ruffian and merkels

17

pacinian corpuscle is involved with

vibration

18

meissner corpuscle is involved with

light touch

19

what is the importance of ensembles of neurons?

functional responses and representations of the body superimposed on cellular maps

20

example of upper level ensemble?

somatosensory maps in cortex

21

tilting of a platform results in

rapid adaption

22

what are the 5 features of an advanced nervous system?

1) cellular specializations
2) areal specializations (collections of cells grouped together for common purpose)
3) Functional cooperation (ensembles of neurons acting in synchrony to produce desired outcome) 4) Adaptability
5) High information storage cap