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
