Question

Which of the following glands in our body controls the biological clock in the human body?
A. Pituitary gland
B. Thyroid gland
C. Pineal gland
D. Parathyroid gland

Answer 1

Each of the biological processes of all living beings (humans, animals, plants, fungi, and microorganisms) has adapted The day-night cycle.
The circadian or circadian rhythm, commonly known as the "biological clock", controls some highly critical biological functions in every living creature, including the sleep-wake cycle, hormone release, blood pressure, and even metabolism.
Chronology is a branch of science that studies biological rhythms and is concerned with the pineal gland and pituitary.

Complete answer:
Option A: The pituitary gland is known as the "master gland" because the hormones it produces monitor and regulate many body activities, including growth and sexual/reproductive development and function.
So, option A is incorrect.
Option B: The thyroid gland is an important hormone gland that affects the human body's metabolism, growth, and development. By continuously releasing a stable number of thyroid hormones into the bloodstream, it aids in the regulation of numerous body functions.
So, option B is incorrect.
Option C: On the dorsal side of the forebrain, the pineal gland is an endocrine gland. The pineal gland produces the hormone melatonin.
Melatonin is essential for our body's -hour (diurnal) rhythm to function properly. It aids in the maintenance of appropriate sleep-wake cycles and body temperatures, for example. Melatonin also affects metabolism, pigmentation, the menstrual cycle, and our ability to defend ourselves. As a result, the pineal gland is the organ in our body that regulates our biological clock.
So, option C is correct.
Option D: Calcium is released into the bloodstream by bones. Calcium absorption via the intestines from meals. Calcium is conserved by the kidneys. Stimulates kidney cells to convert lesser forms of vitamin D into the most effective form for absorbing calcium from the intestines.
So, option D is not correct.

Hence, Option C is the correct answer.

Note:
The following are the fundamental actions related with the biological clock that can keep it controlled or gradually neglect it:
The biological clock regulates sleep, with light serving as the primary external stimulus
Food serves as the primary stimulus for synchronising the circadian rhythms of the body's peripheral tissues.
During wakefulness, when the body's needs are increasing, the immune response is more effective.
Circadian rhythms are not regulated by ageing. As a result, the elderly has difficulty with essential daily functions such as sleep, energy production, and so on.
Traveling across the Atlantic or between continents causes physical and emotional weariness, as well as biological rhythm disruption.