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Which of the following statements are fa...

Which of the following statements are false / true
(A) Calcitonin regulates the metabolism of calcium
(B) Oxytocin stimulates contraction of uterine muscles during birth
(C ) Grave's disease is caused by malfunctioning of adrenal gland
(D) ADH stimulates absorption of water and increase the urine productions

A

a and c are true, b and d are false

B

a and d are true b and c are false

C

a and b are true, c and d are false

D

a, b and c are true, d only false

Text Solution

AI Generated Solution

The correct Answer is:
To determine which of the statements are true or false, let's analyze each statement one by one: ### Step-by-Step Solution: 1. **Statement (A)**: Calcitonin regulates the metabolism of calcium. - **Analysis**: Calcitonin, also known as thyrocalcitonin, is secreted by the parafollicular cells of the thyroid gland. Its primary function is to lower blood calcium levels by inhibiting osteoclast activity (cells that break down bone) and promoting calcium deposition in bones. It acts antagonistically to parathyroid hormone (PTH), which increases blood calcium levels. - **Conclusion**: This statement is **True**. 2. **Statement (B)**: Oxytocin stimulates contraction of uterine muscles during birth. - **Analysis**: Oxytocin is a hormone produced by the hypothalamus and released by the posterior pituitary gland. It plays a crucial role in childbirth by stimulating the contraction of the uterine muscles (myometrium) during labor, facilitating the delivery of the baby. It also aids in milk ejection during breastfeeding. - **Conclusion**: This statement is **True**. 3. **Statement (C)**: Grave's disease is caused by malfunctioning of the adrenal gland. - **Analysis**: Grave's disease is an autoimmune disorder that leads to hyperthyroidism, which is caused by the overactivity of the thyroid gland, not the adrenal gland. The adrenal glands are responsible for producing hormones like cortisol and adrenaline, while the thyroid gland produces hormones that regulate metabolism. - **Conclusion**: This statement is **False**. 4. **Statement (D)**: ADH stimulates absorption of water and increases urine production. - **Analysis**: Antidiuretic hormone (ADH), also known as vasopressin, promotes water reabsorption in the kidneys, specifically in the collecting ducts. This action reduces urine output and helps concentrate the urine. Therefore, it does not increase urine production; rather, it decreases it. - **Conclusion**: This statement is **False**. ### Final Summary: - **True Statements**: (A) Calcitonin regulates the metabolism of calcium. (B) Oxytocin stimulates contraction of uterine muscles during birth. - **False Statements**: (C) Grave's disease is caused by malfunctioning of the adrenal gland. (D) ADH stimulates absorption of water and increases urine production. ### Answer: - **True**: A, B - **False**: C, D
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