The Aspect of the Environment That Is Manipulated or Changed

question 300

Multiple Choice

The aspect of the environment that is manipulated or changed by the researcher during the course of an experiment is:

• A)the independent variable
• B)the dependent variable
• C)a confounding variable
• D)a placebo

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Definitions:

Parasympathetic Division

A branch of the autonomic nervous system that conserves energy as it slows the heart rate, increases intestinal and gland activity, and relaxes sphincter muscles.

Autonomic Nervous System

The part of the nervous system responsible for control of the bodily functions not consciously directed, such as breathing, the heartbeat, and digestive processes.

Motor Response

The physical reaction or movement in response to a specific stimulus, mediated by the central and peripheral nervous systems.

Motor Neuron

A type of neuron that transmits signals from the central nervous system to muscles or glands, causing them to act.