Anatomy & Physiology Endocrine #14

Question

Which endocrine gland is responsible for the body’s circadian rhythm?

Answers

  1. Pineal
    • Rationale:

      The pineal gland produces a hormone called melatonin which is responsible for the maintenance of the body’s sleep-wake cycle, or circadian rhythm.

  2. Thyroid
    • Rationale:

      The thyroid gland produces hormones that regulate the body’s metabolic rate by controlling the cardiac muscle, bone maintenance, brain development in addition to digestive and muscle functions. This gland is not specifically responsible for maintaining the body’s circadian rhythm.

  3. Parathyroid
    • Rationale:

      The parathyroid gland is responsible for maintaining calcium and phosphorus balance within the body. This gland is not specifically responsible for maintaining the body’s circadian rhythm.

  4. Hypothalamus
    • Rationale:

      While the hypothalamus is responsible for many functions within the human body, it is not specifically responsible for maintaining the body’s circadian rhythm.

Overview

The endocrine system is the collection of glands. These glands produce hormones that regulate many functions within the body.

Explanation

Learning Outcomes

Specific functions that are regulated by endocrine glands include, but are not limited to, growth and development, metabolism, mood, reproduction, sexual function, sleep, and tissue function. The pineal gland secretes melatonin. Melatonin is essential in the maintenance of the body’s circadian rhythm.

Test Taking Tip

Consider each gland and its function to answer this question correctly.

Video Rationale