The Reason We Do Not Yet Use Nuclear Fusion as a Common

question 47

Multiple Choice

The reason we do not yet use nuclear fusion as a common energy source is:

• A) it is still theoretical, and has not yet been achieved.
• B) a practical source of fuel has not been found.
• C) the process requires more energy than it produces.
• D) a means has not been found to control the nuclear reactions on a large scale.

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Definitions:

Synapses

are the junctions between neurons in the brain, allowing for the transmission of electrical or chemical signals from one neuron to another.

Terminal Button

The end part of an axon that makes synaptic connections with another nerve cell or with an effector cell.

Synapse

A junction between two nerve cells, consisting of a minute gap across which impulses pass by diffusion of a neurotransmitter.

Otto Loewi

A pharmacologist and physiologist who discovered the first neurotransmitter, acetylcholine, demonstrating chemical communication between nerve cells.