| Consider the following statements. |
| 1. Calcitonin regulates the metabolism of calcium. |
| 2. Oxytocin stimulates contraction of uterine muscles during birth. |
| 3. Grave's disease is caused by malfunctioning of adrenal gland. |
| 4. ADH stimulates absorption of water and increase the urine production. |
| Which of the statements given above are correct? |
A) 1 and 3
B) 1 and 2
C) 2 and 4
D) 1, 2 and 3
Correct Answer: B
Solution :
[b] Calcitonin is a hormone known to participate in calcium and phosphorus metabolism. In mammals, the major source of calcitonin is from the parafollicular or C cells in the thyroid gland, but it is also synthesised in a wide variety of other tissues, including the lung and intestinal tract. In birds, fish and amphibians, calcitonin is secreted from the ultimobrachial glands. The two main actions of oxytocin in the body are contraction of the womb (uterus) during child birth and location. Oxytocin stimulates the uterine muscles to contract and also increase production of prostaglandins, which increases the contractions further.
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