3. The simplest form of nervous system is found in a. Protozoa b. Sponges c. Hydra d. Echinoderms e. Flatworms 4. Which of the following is not part of the autonomic nervous system? a. Sympathetic portion b. Parasympathetic portion c. Enteric portion d. Somatic portion e. None of the above

3. The simplest form of nervous system is found in a. Protozoa b. Sponges c. Hydra d. Echinoderms e. Flatworms 4. Which of the following is not part of the autonomic nervous system? a. Sympathetic portion b. Parasympathetic portion c. Enteric portion d. Somatic portion e. None of the above

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter40: Nervous Systems

Section: Chapter Questions

Problem 4TYK

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Concept explainers

Emotions

Emotions are biologically based psychological conditions caused by neurophysiological changes which are linked to different factors such as thoughts, emotions, behavioral responses, and pleasure or displeasure. These emotions are not similar to moods. The mood is an affective state. Mood depends upon several factors, such as weather, the environment, physiology, etc. Emotions can be beneficial or detrimental depending on the situation. Emotional reactions are simple. Emotional well-being is strongly affected by our well-being, and such feelings are private.

Question

3. The simplest form of nervous system is found in

a. Protozoa

b. Sponges

c. Hydra

d. Echinoderms

e. Flatworms

4. Which of the following is not part of the autonomic nervous system?

a. Sympathetic portion

b. Parasympathetic portion

c. Enteric portion

d. Somatic portion

e. None of the above

Definition Definition A phylum of organisms also known as "flatworms". They are dorsoventrally flattened from head to tail. They are invertebrate, soft-bodied, acoelomate, unsegmented and have bilateral symmetry.

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