Chapter 19

NCERT
Class 11
Biology
Solutions
What is the function of cortisol?

Question:

What is the function of cortisol?

Answer:

Cortisol is a hormone made by the adrenal cortex, often called the “stress hormone.” It is released especially when the body is under stress, but its functions go beyond that. Cortisol helps control how the body uses nutrients, keeps blood sugar steady, regulates immunity, and even follows a daily rhythm to keep you active during the day and restful at night.

Key Functions of Cortisol

  • Stress response: Prepares the body to face physical or emotional stress.
  • Metabolism: Controls how proteins, fats, and carbohydrates are broken down and used for energy.
  • Blood sugar regulation: Maintains steady glucose levels by promoting glucose production in the liver.
  • Immune balance: Reduces unnecessary inflammation and keeps immunity in check.
  • Daily cycle: Higher in the morning to boost energy, lower at night to allow rest.

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