MYTUTOR SUBJECT ANSWERS

659 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 ...

1 year ago

Answered by Dani, an A Level Biology tutor with MyTutor


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

231 SUBJECT SPECIALISTS

£20 /hr

Mihai P.

Degree: Natural Sciences (Bachelors) - Cambridge University

Subjects offered:Biology, Maths+ 2 more

Biology
Maths
Chemistry
-Medical School Preparation-

“I would like to share my passion for science and help you discover the key patterns which govern our world.”

£20 /hr

Tamara A.

Degree: Medicine (Bachelors) - Liverpool University

Subjects offered:Biology, Maths+ 1 more

Biology
Maths
Chemistry

“I'm a friendly second year medical student with a year's experience in tutoring. I'm passionate about science, and I'm patient and approachable.”

MyTutor guarantee

PremiumFerdinand B. A Level Biology tutor, A Level Chemistry tutor, GCSE Che...
£30 /hr

Ferdinand B.

Degree: Medical Sciences (Bachelors) - Exeter University

Subjects offered:Biology, Maths+ 2 more

Biology
Maths
French
Chemistry

“Currently studying Medical Sciences. Very sporty, very sociable, and also a very supportive tutor! ”

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 different forms of RNA are found in a cell and what are their functions?

Describe how a heartbeat is initiated and coordinated?

Describe what happens at a chemical synapse

What is the difference between allopatric and sympatric speciation?

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