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Flashcards in Cell Biology of Nervous System Deck (65)
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1

what were the two original theories as to what the nervous system was? What one is correct

Ramon y Cajal - system of individual cells that communicate - this is correct

Camimllo Golgi - interconnected city of cells

2

what are nerve cells effectively

electrical cells

3

what do nerve cells create

AP's

4

what are the two ways nerve cells communicate

chemically and electrically

5

what is the CNS and what does it do

CNS - Braina nd spinal cord
process info
transport thro higher centres

6

what is the PNS and what does it do

Peripheral Neves outwit CNS
colect info sensory from periphery from enviro and back to CNs and back

7

what re neurons

building blocks of nervous system act as link in chain

8

what are processes

important functioning unit which allow communication

9

what nervous system has more processes

cNS more dendrites

10

what are glial cells

support cells

11

why do nerve cells need support cells

very delicate and help with function etc haha

12

how do nerve cells communicate

by secretion

13

what are the approximation of neutrons and glial cells

100 billion neurons with X10 more supporting glial cells

14

what is a neon a modified version of

secretory cell modified

15

what transports the neurtotrans

microtubules in axon

16

what are some parts of basic neurone cell structure

dendrites
nucleus
cell body
axon hillock
axon

17

how is the cytoplasm packed

very densely packed cyto a lot going on

18

what does the nerve cell body contain

rER nd ribosomes = proteins and mems
create cell process and vesicles

19

how are neurons classified

number of processes

20

what are the classification

unipolar
pseudo unipolar
bipolar
multipolar

21

what are pseudounipolar

one process no dendrites associated very rare to see fused dendrites

22

what is unipolar

a single process but no dendrites

23

when a single dendrite and the axon fuse during development

pseudounipolar

24

what are bipolar axons

an axon and the one dendrite

25

what is an example of a bipolar axon

special senses - eye, ear, nose

26

are bipolar axons common

not very more so than unipolar

27

what si the most common axon

multipolar

28

what is multipolar

many dendrites and one axon

29

what is a pyramidal cell an example of

multipolar, in cerebral cortex a lot of communication in CNS in brain

30

what do interneurons do

very short axons communication interconnecting cells