Arrange the Following Events in the Proper Sequence

question 177

Multiple Choice

Arrange the following events in the proper sequence:
1) Efferent neuron reaches threshold and fires an action potential.
2) Afferent neuron reaches threshold and fires an action potential.
3) Effector organ responds by performing output.
4) Integrating center reaches decision about response.
5) Sensory organ detects change in the environment.

• A) 2, 3, 5, 1, 4
• B) 5, 2, 4, 1, 3
• C) 5, 1, 4, 2, 3
• D) 5, 3, 4, 2, 1
• E) 3, 1, 4, 2, 5

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Definitions:

Appetite Suppression

The decrease in the desire to eat, potentially due to psychological factors, physiological mechanisms, or external substances.

Natural Selection

The process by which organisms better adapted to their environment tend to survive and produce more offspring, a key mechanism of evolution described by Charles Darwin.

Evolution

The process by which different kinds of living organisms are thought to have developed and diversified from earlier forms during the history of the earth.

Allele

A variant form of a gene at a particular location on a chromosome that controls a specific trait.