Currently unavailable: for regular students
Degree: Neuroscience (Bachelors) - Bristol University
I am a recent Neuroscience graduate from the University of Bristol. Ready to help with any of your Science queries - get in touch!
|Biology||A Level||£20 /hr|
As the action potenial reaches the synaptic terminal depolarisation causes voltage-gated Ca2+ channels to open. The opening of these ion channels causes an influx of Ca2+ ions because of the high concentration gradient which is maintained across the cell membrane. Ca2+ in the synpatic terminal causes vesicles containing neurotransmitter molecules to move towards the membrane, and neurotransmitters to be released into the cleft by exocytosis. The neurotransmitter molecules diffuse across the cleft and bind to complementary receptors on the post-synaptic cell. The binding of neurotransmitters causes ion channels associated with the receptors to open, allowing the influx of ions. If sufficient ions enter the post-synaptic cell, an action potential will be generated.see more
Only present in plant cells, it provides structure and is completely permeable to biological molecules.
Much thinner than cell wall and is present in all cells. It is selectively permeable to certain molecules.