Cancers Are Groups of Cells That Divide Rapidly and Uncontrollably

question 5

Multiple Choice

Cancers are groups of cells that divide rapidly and uncontrollably. Thus cancer cells

• A) are always in the G₀ phase.
• B) never enter the cell cycle.
• C) probably have a very short G₁ phase.
• D) are stuck at the metaphase plate.

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Definitions:

Leptin

A hormone produced by fat cells that helps to regulate body weight by signaling satiety to the brain.

Sleeptalking

The occurrence of speaking during sleep without being aware of it, ranging from simple mumblings to complex dialogues, and often considered a benign sleep disorder.

REM Sleep

Rapid Eye Movement sleep, a unique phase of sleep characterized by random rapid movement of the eyes, low muscle tone throughout the body, and the propensity of the sleeper to dream vividly.

N1 Sleep

The initial stage of the sleep cycle, characterized by light sleep, where one can be easily awakened and might experience sudden muscle contractions known as hypnic jerks.