Molting and Subsequent Ecdysis in Crustaceans

question 20

Multiple Choice

Molting and subsequent ecdysis in crustaceans

• A)involves production of a new cuticle and shedding of the old one.
• B)is initiated by a stimulus perceived by the central nervous system.
• C)involves a molt-inhibiting hormone produced by the X-organ of the eye stalk,and a molting hormone produced by the Y-organs near the mandibles.
• D)cues on stimuli such as day length,temperature,or humidity.
• E)All of the choices are correct.

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Definitions:

Conditioned Response

An automatic response established by training to an ordinarily neutral stimulus.

Unconditioned Stimulus

The stimulus normally produced by the unconditioned response (e.g., food producing salivation).

Expectancies

What someone expects to happen, based on past experiences of what was rewarding.

Rewards

Benefits or positive feedback received as a result of an action, which serve as reinforcement for that behavior.