The Role of Calcium Ions Ca²⁺) in Synaptic Transmission Is

question 28

Multiple Choice

The role of calcium ions Ca²⁺) in synaptic transmission is to

• A) bind neurotransmitter molecules to the postsynaptic membrane.
• B) mediate the release of neurotransmitter molecules from the presynaptic neuron.
• C) repolarize the postsynaptic cell after transmission has been completed.
• D) increase the activity of the sodium-potassium pumps in the presynaptic cell.

---

Definitions:

Economies of Scale

Economies of scale refer to the cost advantages that enterprises obtain due to their scale of operation, with cost per unit of output decreasing with increasing scale.

Constant Returns to Scale

A situation in production where increasing the inputs exactly proportionally results in an equivalent increase in output.

Economies of Scale

The financial benefits gained by businesses as a result of their operation size, wherein the expense for each unit produced typically drops as the scale expands.

Average Total Costs

The total cost of production divided by the quantity of output produced; it includes both fixed and variable costs.