Question

An investigator places an isolated neuron in a calcium-
free medium, gives the neuron a suprathreshold
stimulus and then performs an assay to test whether
neurotransmitter is released into the medium. Which of
the following outcomes would you predict ?

a) No neurotransmitter is detected since influx of
calcium into the synaptic knob is required for
neurotransmitter release.

(b) No neurotransmitter is detected since influx of
calcium is required in order for the neuron to
conduct an action potential.

c) Neurotransmitter is detected since calcium is not
required for action potential conduction and the
initial stimulus was suprathreshold.

(d) We cannot predict the outcome without knowing
whether the neuron was myelinated
​

Answer 1

Answer:

a

Explanation:

calcium is always needed for neurotransmitter release

Answer 2

Answer:

Here is ur answer.....

option (a) is correct

Explanation:

Because influx of

calcium into the synaptic knob is required for

neurotransmitter release.....ca++ contact with synaptic vesicles which contains neurotransmitters and tends to move it towards membrane of pre-synaptic neuron then ---->Docking (attachment to membrane). ---->Exocytosis of vesicles. ----->Release of neurotransmitters....

Hope this helps you

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