The Independent Variable in an Experiment Is

question 201

Multiple Choice

The independent variable in an experiment is

• A)the subject him or herself.
• B)a measure of the subject's behavior.
• C)the variable that the experimenter chooses to manipulate.
• D)any unwanted variable that may adversely affect the subject's performance.

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Definitions:

Antagonist

A substance that impedes or counteracts the action of another, especially a muscle that opposes the action of another muscle.

Synaptic Knob

The part of a neuron that releases neurotransmitters to transmit signals to another neuron or muscle cell.

Neuromuscular Junction

The synapse or junction where a motor neuron transmits a signal to a muscle fiber causing it to contract.

Muscle Fiber

An individual muscle cell, long and cylindrical, which contracts to produce movement.