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Sergei, a Scientist, Invented a Method of Using Solar Energy

question 30

Multiple Choice

Sergei, a scientist, invented a method of using solar energy to power electrical devices. However, the cost of using the method on a large scale was prohibitive. Hence, his invention was not adopted by his target customers. The lack of ________ was the reason for the failure of his invention.


Definitions:

Action Potential

A sudden change in electrical charge across a cell membrane, resulting in a rapid signal that can travel along neurons.

Cell Membrane

A biological membrane that separates the interior of all cells from the outside environment, controlling the passage of substances.

Voltage

The difference in electric potential between two points, crucial in the generation and transmission of nerve impulses in neurons.

Refractory Periods

Time intervals following an action potential during which a neuron is incapable of firing again or the threshold for firing is elevated.

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