A Cyclin ________

question 36

Multiple Choice

A cyclin ________.

• A) is present in similar concentrations throughout the cell cycle
• B) is activated by binding to microtubules
• C) decreases in concentration when MPF activity increases
• D) activates a Cdk molecule when it is in sufficient concentration
• E) activates a Cdk molecule when its concentration is decreased

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Definitions:

Catecholamines

A class of chemicals containing epinephrine and norepinephrine.

Epinephrine

A chemical manufactured by the adrenal medulla that accounts for much of the hormone production of the adrenal glands; sometimes called adrenaline.

Autonomic Nervous System

A part of the peripheral nervous system that controls involuntary body functions, such as heart rate, digestion, and respiratory rate.

Heart Rate

The number of heartbeats per minute, an important indicator of heart health and overall physical fitness.