Which of the following glands secretes the hormone melatonin?
1. anterior pituitary gland.
2. melanocytes.
3. pineal gland.
4. suprachiasmatic nucleus of hypothalamus.

Identify the incorrect statement:
1. In males FSH regulates spermatogenesis
2. Thyroid gland produces T3 and thyroxine (T4) hormones
3. ACTH stimulates secretion of glucocorticoids
4. PTH is a hyperglycemic hormone

Hormones that act by interacting with intracellular include all the following except:
1. Thyroxin
2. Estrogen
3. Epinephrine
4. Cortisol 

The amino acid derivative among the following hormone is:-

1. Insulin
2. Epinephrine
3. Estradiol
4. Testosterone

Androgenic steroids in female are secreted by:
1. pineal gland
2. Testes
3. Adrenal cortex
4. Hypothalamus

ACTH controls the secretion of:
1. cortisol
2. aldosterone
3. epinephrine
4 testosterone

The biomolecule that cannot act as a chemical messenger [hormone] is:
1. Proteins

2. Steroids

3. Fatty acids

4. Carbohydrate

Which of the following is a storage and release center for neurohormones?
1. Anterior pituitary
2. Posterior pituitary
3. Adrenal medulla
4. Pineal

Which hormones stimulate the production of pancreatic juice and bicarbonate?
1. angiotensin and epinephrine
2. gastrin and insulin
3. cholecystokinin and secretin
4. insulin and glucagon

All the following regarding regulation of a physiological function by either a neurotransmitter or a hormone are true except:
1. Target cells must have specific receptor proteins with which these molecules combine.
2. When these molecules bind to target cells, specific sequences of changes must occur.
3. There must be an “off-switch” that will stop the induced changes.
4. Second messengers will always be involved in the response of the target cell.