Tag: pineal gland and thymus

Questions Related to pineal gland and thymus

Which of the following gland in our body controls the biological clock in the human body?

zoology endocrine system and chemical co-ordination pineal gland pituitary gland and pineal gland pineal gland and thymus

  1. Pitutary gland

  2. Thyroid gland

  3. Pineal gland

  4. Parathyroid gland

Show answer
Correct Option: C
Explanation:

  • The pineal gland is an endocrine gland located on the dorsal side of the forebrain. Pineal secretes a hormone called melatonin.
  • Melatonin plays a very important role in the regulation of a 24-hour (diurnal) rhythm of our body. For example, it helps in maintaining the normal rhythms of the sleep-wake cycle, body temperature. In addition, melatonin also influences metabolism, pigmentation, the menstrual cycle as well as our defense capability. Hence the gland in our body that controls biological clock is a Pineal gland.

So, the correct answer is 'Pineal gland'.

Which of these hormones may have a primary role in many circadian rhythms?

zoology endocrine system and chemical co-ordination pineal gland pituitary gland and pineal gland pineal gland and thymus

  1. Insulin

  2. Estradiol

  3. Melatonin

  4. Epinephrine

Show answer
Correct Option: C
Explanation:

The circadian rhythm or 24 hours diurnal rhythm of our body is maintained by Melatonin hormone secreted from the Pineal gland which is located on the dorsal side of forebrain. In addition, the melatonin hormone even assist in metabolism, pigmentation and even maintaining our defence capabilities.

So, the correct answer is 'Melatonin'.