Celery Stalks That Are Immersed in Fresh Water for Several

question 68

Multiple Choice

Celery stalks that are immersed in fresh water for several hours become stiff and hard. Similar stalks left in a 0.15 M salt solution become limp and soft. From this we can deduce that the cells of the celery stalks are

• A) hypotonic to both fresh water and the salt solution.
• B) hypertonic to both fresh water and the salt solution.
• C) hypertonic to fresh water but hypotonic to the salt solution.
• D) hypotonic to fresh water but hypertonic to the salt solution.
• E) isotonic with fresh water but hypotonic to the salt solution.

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Definitions:

Conditioning

Conditioning is a process of behavior modification by which a subject comes to respond in a desired manner to a previously neutral stimulus.

Stimulus Presentation

The act of introducing a stimulus to a subject's sensory medium (e.g., visual, auditory) to provoke a response or examine the subject's behavior in psychological experiments.

Schedule of Reinforcement

A plan or strategy in behavioral psychology for determining which responses will be reinforced to shape or modify behavior.

Partial Reinforcement

A conditioning strategy in which a reward is not administered every time the desired behavior is performed, often leading to more resistant behavior change.