Q. No.Which of the following glands secretes the hormone melatonin?
1. anterior pituitary gland
2. melanocytes
3. pineal gland
4. suprachiasmatic nucleus of the hypothalamus
The 24 hour (diurnal) rhythm of our body such as the sleep-wake cycle is regulated by the hormone
1. calcitonin
2. prolactin
3. adrenaline
4. melatonin
Which of the following endocrine gland secretes melatonin
(1) Pituitary gland
(2) Pineal gland
(3) Hypothalamus
(4) Thymus
Which of the following hormone regulates sleep-wake cycle ?
(1) Melatonin
(2) Thyroxine
(3) Vasopressin
(4) MSH
Which of the following is true about melatonin?
(1) It influences metabolism
(2) It influences pigmentation
(3) It influences menstrual cycle
(4) All of these
2. estrogen and progesterone
3. cortisol and cortisone
4. melatonin and serotonin
Artificial light, extended work-time and reduced sleep-time disrupt the activity of:
1. Thymus gland
2. Pineal gland
3. Adrenal gland
4. Posterior pituitary gland
| 1. | Pineal | Located on the ventral side of the forebrain |
| 2. | Thymus | Located on the ventral side of aorta between lungs |
| 3. | Adrenal | Located at the superior pole of each kidney |
| 4. | Parathyroid | Located on the back side of the thyroid gland |
Normal sleep-wake cycle in a human body is maintained by the secretion of:
1. Thyroid gland
2. Thymus gland
3. Pineal gland
4. Pituitary gland
| I: | helps in maintaining the normal rhythms of sleep-wakefulness cycle and body temperature. |
| II: | influences metabolism, pigmentation and the menstrual cycle. |
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
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