MYTUTOR SUBJECT ANSWERS

452 views

How are signals transmitted across the synaptic cleft?

When the action potential reaches the synaptic knob it causes voltage-gated calcium ion channels to open, allowing calcium ions to diffuse in.

These calcium ions cause synaptic vesicles containing acetylcholine to move to an fuse with the pre-synaptic membrane where they release the acetylcholine into the synaptic cleft by exocytosis.

The acetylcholine moves across the cleft by diffusion and binds to receptors on the post-synaptic membrane.

This causes sodium ion channels to open allowing sodium ions to diffuse into the post-synaptic neurone.

This creates an excitory post-synaptic potential (EPSP) and if this is above threshold potential, an action potential is created in the post-synaptic neurone.

Dani E. A Level Biology tutor, GCSE Biology tutor, A Level Chemistry ...

11 months ago

Answered by Dani, an A Level Biology tutor with MyTutor


Still stuck? Get one-to-one help from a personally interviewed subject specialist

164 SUBJECT SPECIALISTS

£24 /hr

Katherine Y.

Degree: Biochemistry (Masters) - Leeds University

Subjects offered:Biology, Human Biology+ 2 more

Biology
Human Biology
Chemistry
-Personal Statements-

“Tutor from the University of Leeds, studying Biochemistry. Teaching Biology and Chemistry”

£22 /hr

Bobola A.

Degree: Medicine (MBChB - Bachelor of Medicine, Bachelor of Surgery) (Bachelors) - Liverpool University

Subjects offered:Biology, Human Biology+ 2 more

Biology
Human Biology
-Personal Statements-
-Medical School Preparation-

“I believe that genuine enthusiasm is the way in which we can inspire, encourage and teach students. It's what I plan to bring to all my tutoring sessions”

£22 /hr

Josh M.

Degree: Biological Natural Sciences (Bachelors) - Cambridge University

Subjects offered:Biology, Physics+ 3 more

Biology
Physics
Maths
Chemistry
-Oxbridge Preparation-

“Who am I? I'm currently studying Natural Sciences in my third year at Cambridge University, with a focus on Neuroscience. Science is my passion, I've loved it at every level I've studied it, and a desire to pass on my passion is part ...”

About the author

Dani E.

Currently unavailable: for regular students

Degree: Biological Sciences (Bachelors) - Oxford, Keble College University

Subjects offered:Biology, -Personal Statements-

Biology
-Personal Statements-

“I have just completed a BA in biology at Oxford and will hopefully be going on to do a PHD in interdisciplinary biosciences at Oxford next year. My main interests are in animal behaviour and sensory systems but my degree has covered a...”

MyTutor guarantee

You may also like...

Posts by Dani

How are signals transmitted across the synaptic cleft?

what are the differences between involuntary, cardiac and voluntary muscle?

Other A Level Biology questions

What are the features of ATP which lead it to being termed the 'universal currency' of the cell?

what are the differences between involuntary, cardiac and voluntary muscle?

How does the lac operon work?

Explain what is meant when the genetic code is described as 'degenerate'.

View A Level Biology tutors

We use cookies to improve your site experience. By continuing to use this website, we'll assume that you're OK with this. Dismiss

mtw:mercury1:status:ok