The Thyroid Gland

Q. Assertion : Hormone calcitonin has an antagonistic effect to that of parathormone.

Reason : Calcitonin decreases blood calcium level while parathormone levels increase blood calcium level.

1. Both assertion and reason are true but reason is not the correct explanation of the assertion.
2. Assertion is true but reason is false.
3. Both assertion and reason are false.
4. Both assertion and reason are true and the reason is the correct explanation of the assertion.

Q.

Write the name of two hormones secreted by the thyroid gland.

Q. Which of the following statements are true/false ?
I. Calcitonin regulates the metabolism of calcium
II. Oxytocin stimulates contraction of uterine muscles during birth
III. Grave's disease is caused by malfunctioning of adrenal gland.
IV. ADH stimulates absorption of water and increase the urine production.

1. I and III are true, II and IV are false
2. I and II are true, III and IV are false
3. I and III are false, II and IV are true
4. I, II and III are true, IV only false

Q.

Given the reason for the following:

Goitre is usually observed in people living in hilly regions.

Q. Iodine is added to commercially prepared table salts to prevent deficiencies of this mineral. Which gland(s) require(s) iodine to function properly?

1. Parathyroids
2. Pancreas
3. Thyroid
4. Ovaries and testes

Q. Which of the following hormone is not correctly matched to its source?

1. Adrenal cortex - Corticoids
2. Adrenal medulla - Catecholamines
3. Thymus - Thyroxine
4. Parathyroid gland - PTH