Save
Busy. Please wait.
or

show password
Forgot Password?

Don't have an account?  Sign up 
or

Username is available taken
show password

why


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.


Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't know
Remaining cards (0)
Know
0:00
share
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

FA-2016 neuro pg 453

firstaid neuro page 453( based of FA 2016)

QuestionAnswer
what are the signal transmitting cells of nervous system? neurons
how often do neurons divide? permanent cells - do not divide in adulthood
what are neurons? signal relating cells with dendrites(receive input), cell body and axon(sends output)
what do dendrites do? receive input
what do axons do? sends output
cell body and dendrite can be stained how? stained via nissl substance (stains RER)
why axons not stained? no RER in the axon
what happens if axon is injured? it undergoes wallerian degeneration
what is wallerian degeneration? degeneration distal to injury and axonal retraction proximally
what is the work of wallerian degeneration? allows for potential regeneration of axon(if in PNS)
function of axon? physical Support, Repair, K+ metabolism, removal of excess neurotransmitter, component of BBB, glycogen fuel reserve buffer ( SRK is BG Removing excess neurotransmitter)
how do astrocyte respond to neural injury? by Reactive gliosis
what is the marker for astocyte? GFAP
astrocyte is derived from what? neuroectoderm
what is microglia? phagocytic scavenger cell of the neruvous system (mesodermal, mononuclear origin)
germ layer origin of microglia? mesoderm
how do microglia stain with nissl stain? not readily discernible with nissl stain
what happens to microglia in HIV? HIV inected microglia fuse to form giant cell in the CNS
what is the function of myelin? wraps and insulates axons : 1) increase space constant 2) increase conduction velocity
fuction (particularly increase condution velocity) of myelin result in what action? saltatory conduction of action potential between node of ranvier, where there are high concentration of sodium channel
what makes myelin in CNS? oligodendrocyte
what makes myelin in PNS? schwann cells
each schwann cell myelinate how many PNS axon? 1 PNS axon
function of schwann cell (similar to wallerian degeneration) promotes axonal regeneration
schwann cell derived from where? neural crest
proper function of schwann cell? increase condution velocity via saltatory conduction at node of Ranvier, where there is high concentration of Na+ channel
schwann cells are destroyed in what disease? Guillian barre syndrome
where is vestibular schwanoma(acoustic neuroma) located? located in the internal acoustic meatus(CN VIII)
if acoustic neuroma is bilateral what is it associated with? associated with Neurofibromatosis type 2
each oligodendrocyte myelinate how many CNS axon? multiple axon (upto 30)
what is the predominant glial cell in white matter? oligodendroglia
how does oligodendroglia appear on H & E? fried egg apprearenace
what are the disease if oligodendroglia is injured? MS / Progressive multifocal leuckoencephalopathy (PML) / leukodystrophies
oligodendroglia derived form what? neuroectoderm
Created by: nepal.sarthak1
 

 



Voices

Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!

"Know" box contains:
Time elapsed:
Retries:
restart all cards