Propogation Flashcards
What is the resting membrane potential
It is the amount of volatile that the neuron has at rest -70 mV
Excitatory post synaptic potential
Cell voltage becomes more positive likely to pass the current down the axon
Inhibitory post synaptic potential
Cell voltage become more negative and likely to pass the current down the axon.
Inhibition
Is the process of passing a current down that is less cell voltage than at the testing membrane
Depolarization
Is when the cell voltage goes up from resting potential
What does the cell have to do when both positive and negative Nuevo transmitters reach the receptor
It has to decide what to do with the i for and decide what to do. It must send many action potentials
Threshold
This is a value that will allow the cell to continue passing the action potential down the axon
What is the threshold for Na+that will cause the voltage gate channels to open
-55mV
There is resistance Of the current of ions flowing
True.
How does the cell make the wave of an toon potential continue fmdown the neuron
The booster station make it so the cell voltage must reach the same amount so it’s continually passed down
Nodes
Small breaks between myelinated axon. Nodes contain voltage gated sodium channels that allow sodium to come in a make action potential boosted
Where is Myelin made
It is made of the phospholipid membranes of certain glial cells. Wrapped around the axon like rubber aroun an electrical wire
Myelin allows for
Fewer boost and quicker speeds
What type of axons do pain carrying neurons have.
Very wide allows for lest resistance I. The axon for the sodium current
Narrow Avon’s are the slowest
So pain pathways have thin or thick myelinated pathways
Thick and myelinated as possible to make transmission fastes
Unmiliinated nuerons exist where
In gastric track. We break down food at a constant rate so these neurons axons don’t have to be thick or mylyleniated
Where do volatile fatter sodium channels occur
At the nodes and trigger zone
Ligand is another word for
Neurotransmitter
Direct neurotransmitter action
The same place that the Nt binds is the same place the ions flows through
These are very fast acting
For example skeletal muscle
Indirect neurotransmitter channel
Not the same channel opens where the neurotransmitter binds. It takes time for the channel that’s away to open. Some neurotransmitters can activate enzymes or turn of nueclous coding genes
These are slow acting
For eaxamole the heart beats slowly to slow down heart rate to fill and squeeze blood out and smooth muscle in intestine
There are over how many nt in the body
200
What are the five groups of my
Acetylcholine. Biogenic Amino acids Peptides Purines
Acetylcholine
Can be both excititoray or inhintaroy
Binds to al three muscles. Skeletal smooth and cardiac
When in skeletal opens sodium so fast acting
When in heart muscle it open up channels indirectly for potassium to leave inhibitory
When I’m smooth muscle it opens up calcium indirectly so slow acting
Agonist
Helps or enhance the action of the NT More excitement in the body or less excitement
Antagonist
Stop NT from doing their job
Botox is example because it prevent acetylcholine from doing its jobs of contracting skeletal muscle.
