Save
Busy. Please wait.
Log in with Clever
or
show password
Forgot Password?
Don't have an account?  Sign up 
Sign up using Clever
or
Username is available taken
show password


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. Your email address is only used to allow you to reset your password. See 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
edit
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

Synapses

AQA A-level biology nervous system year 13

TermDefinition
Presynaptic terminal/synaptic knob End of an axon terminal & adjacent to postsynaptic terminal on the dendrite
Ligand gated channels Specialised protein channels that open or close in response to the binding of a specific ligand (substrate)
Cholinergic synapse Chemical synapse that uses the neurotransmitter acetylcholine to transmit signals between neurones
Temporal summation When multiple action potentials are generated from a single presynaptic neurone in quick succession
Spatial summation The combined effects of multiple neurotransmitters on a single postsynaptic neurone (generally from multiple presynaptic neurone)
Order of impulse transmission: 1 Action potential travels down the axon of the presynaptic neurone and opens volatge gated calcium channels allowing an influx of calcium ions
Order of impulse transmission: 2 The calcium ions bind to the synaptic vesicles causing it to release its neurotransmitters (I.e., acetylcholine) into the synapse through exocytosis
Order of impulse transmission: 3 Acetylcholine (AcE) diffuses across synaptic cleft quickly because of the short diffusion pathway and two molecules bond to the receptor sites on the cholinergic ligand gated channel causing it to open and allow in sodium ions
Order of impulse transmission: 4 This generates a new action potential in the post-synaptic neurone
Order of impulse transmission: 5 AcE hydrolase hydrolysed it into choline and acetic acid (to avoid summation) & diffuse back into the presynaptic neurone to be recycled
Order of impulse transmission: 6 ATP is used by the mitochondria to recombine the choline and acetic acid and resynthesise the AcE for future use, the ligand gated sodium channels close
Excitatory neurotransmitters Neurotransmitters that bind to specific receptors to increase the likelihood of an action potential
Inhibitory neurotransmitters Neurotransmitters that bind to specific receptors to decrease the likelihood of an action potential
Created by: Study_B
Popular Biology sets

 

 



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