If the Radial Nerve in an Arm Is Cut,the Podia

question 31

Multiple Choice

If the radial nerve in an arm is cut,the podia in that arm lose coordination;if the circumoral nerve ring is cut,podia in all arms are uncoordinated and movement ceases.This indicates that

• A)the hydraulic system is not involved in movement of tube feet.
• B)the radial nerve controls the nerve ring.
• C)part of the function of tube feet is hydraulic and part is controlled by the nerve stimulation.
• D)water pressure in the hydraulic system is directly controlled by the nervous system.
• E)the sea star is aware of the extent it is damaged and can change behaviors to compensate.

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Definitions:

Independent Variable

The variable in an experiment that is manipulated or changed by the researcher to observe its effects on the dependent variable.

Manipulation Check

A measure used to determine whether the manipulations in an experiment have the intended effect on the subjects.

Interactions

The ways in which variables influence each other in research, which can complicate the interpretation of a study's results.

Defendant's Appearance

The physical presence and presentation of a defendant in court, which can influence judgments or perceptions of guilt and character.