Question

Which of the following statements are true and false?

(a) Calitonin regulates 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 production.

• 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, band c are true, d only false
• E. a only true, b, c and d are false

Answer 1

The correct option is C a and b are true, c and d are false

• Calcitonin is secreted from the C-cells of thyroid gland and acts on bone and kidneys to reduce blood calcium level.
• Oxytocin is secreted from the posterior pituitary and helps in the contraction of uterus during childbirth and also stimulates release of milk from mammary glands i.e. lactation.
• Grave's disease,also known as exophthalmic goitre, occurs in adults due to over secretion of thyroid hormone i.e. thyroxine due to increased secretion of TSH (Thyroid stimulating hormone) from anterior pituitary.
• ADH (Anti diuretic hormone )or Vasopressin is secreted from the posterior part of pituitary gland. This hormone increases reabsorption of water in kidneys and this results in decreased rate of urine production.
  

Hence, statements a and b are true but c and d are false.
So, the correct answer is 'a and b are true, c and d are false'.