The presence of cholesterol regulates the in animal cells.

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
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**Question:**  
The presence of cholesterol regulates the ______ in animal cells.

- a. fluidity of a membrane
- b. polarity of a membrane
- c. structure of a membrane

**Explanation:**

This question assesses your understanding of cholesterol's role in animal cell membranes. Cholesterol is a crucial component of cell membranes, influencing their properties in several ways. Consider each option carefully:

- **Fluidity of a membrane:** Cholesterol is known to modulate the fluidity of membranes. It prevents them from becoming too rigid or too fluid by fitting between phospholipid molecules.

- **Polarity of a membrane:** While cholesterol can affect several physical properties of membranes, it does not directly regulate their polarity.

- **Structure of a membrane:** Cholesterol contributes to the overall structure of the membrane, but its primary role is often emphasized in terms of fluidity rather than basic structural support.

Reflect on these descriptions to determine which aspect cholesterol predominantly regulates.
Transcribed Image Text:**Question:** The presence of cholesterol regulates the ______ in animal cells. - a. fluidity of a membrane - b. polarity of a membrane - c. structure of a membrane **Explanation:** This question assesses your understanding of cholesterol's role in animal cell membranes. Cholesterol is a crucial component of cell membranes, influencing their properties in several ways. Consider each option carefully: - **Fluidity of a membrane:** Cholesterol is known to modulate the fluidity of membranes. It prevents them from becoming too rigid or too fluid by fitting between phospholipid molecules. - **Polarity of a membrane:** While cholesterol can affect several physical properties of membranes, it does not directly regulate their polarity. - **Structure of a membrane:** Cholesterol contributes to the overall structure of the membrane, but its primary role is often emphasized in terms of fluidity rather than basic structural support. Reflect on these descriptions to determine which aspect cholesterol predominantly regulates.
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