Question

how many calcium ions diffuse across a pre-synaptic membrane at a time?​

Answer 1

Explanation:

BODMAS explains the order of operations to be performed while solving an expression. According to BODMAS rule, if an expression contains brackets ((), {}, []) we have first to solve or simplify the bracket followed by ‘order’ (that means powers and roots, etc.), then division, multiplication, addition and subtraction from left to right.

Answer 2

Answer:

1. Calcium (Ca2+)is a vital element in the process of neurotransmitter release; when Ca2+channels are blocked, neurotransmitter release is inhibited.

2. These consist of multi-protein complexes that tether the synaptic vesicle to the presynaptic membrane and contain high concentrations of voltage-gated calcium channels.

3. This leads to brisk calcium influx in response to axon terminal depolarization, since the concentration of calcium is 10,000 times higher in the extracellular fluid.