During the Eighth Week

question 37

Multiple Choice

During the eighth week

• A)all organ systems have appeared.
• B)ossification begins.
• C)eyes,ears,and nose are noticeable.
• D)mother begins to feel movement.

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Definitions:

Hormones

Chemical messengers produced by the endocrine glands that travel through the bloodstream to tissues or organs, affecting many different bodily processes.

Absolute Threshold

The minimum intensity of a stimulus that one can detect 50% of the time, a concept used in sensory and perception research.

Reliable Detection

The ability to consistently identify or recognize true occurrences of a specific event or condition.

Difference Threshold

The smallest amount of difference in intensity between two stimuli that a person can detect half the time.