Flatworms Are the Most Primitive Animal Phylum to Have

question 18

Multiple Choice

Flatworms are the most primitive animal phylum to have:

• A)asymmetry.
• B)radial symmetry.
• C)organs.
• D)a circulatory system.
• E)muscle tissue.

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Definitions:

Physiological Arousal

This term describes the body's physical response to emotions or stimuli, such as increased heart rate or sweaty palms.

James-Lange Theory

A theory of emotion suggesting that emotions are the result of the interpretation of bodily reactions to stimuli, rather than the cause of such reactions.

Cognitive Labeling

The process of identifying and naming emotions and feelings that are being experienced, often influencing how they are understood and acted upon.

Sympathetic Nervous System

A part of the autonomic nervous system that activates what is often termed the fight or flight response, preparing the body for rapid action in response to threats.