Match the Systems, Labelled A

question 148

Multiple Choice

Match the systems, labelled a. through c. with their characteristics. (Options may be used more than once or not at all.)
-secretes chemical messengers that affect target cells

• A)the endocrine system
• B)the nervous system
• C)both the endocrine and nervous systems

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Definitions:

Experimental

Pertaining to or based on experiments, which are structured and controlled tests or investigations to establish or test a hypothesis.

Placebo

An inert or non-effective substance or treatment given to a participant in a study, used to contrast with an active substance to test its efficacy.

Test

An assessment or examination intended to measure a test-taker's knowledge, skill, aptitude, physical fitness, or classification in many other topics.

Independent Variable

The variable in an experiment that is manipulated to observe its effect on the dependent variable.