One of the reasons for iodine to be a part of a balanced diet would be:

1.	Iodine is needed for an enzyme that facilitates the synthesis of thyrotropin-releasing hormone (TRH).
2.	The thyroid gland cannot produce thyroxine without iodine, which leads to the goiter condition.
3.	Iodine is necessary for the proper functioning of the thyroid, adrenals and pancreas.
4.	The iodine is needed for positive feedback to the hypothalamus and the anterior pituitary to stimulate the thyroid to produce more thyroxine. This in turn prevents the goiter condition.

Glucocorticoids are characterized by all except:
1. Glucocorticoids stimulate the breakdown of muscle proteins into amino acids.
2. Cortisol is a glucocorticoid.
3. Glucocorticoids stimulate the pancreas to produce the enzymes needed for gluconeogenesis.
4. Glucocorticoids are released during times of stress.

Melatonin:
1. levels decrease in darkness and increase in daylight.
2. is secreted by the hypothalamus.
3. is secreted by the pineal gland under the control of the anterior pituitary.
4. is secreted by the pineal gland under the control of the hypothlamus.

Prostaglandins are derivatives of:
1. cortisol, a lipid
2. membrane phopholipids
3. cholesterol, a lipid
4. arachidonic acid, a lipid

Identify the hormone:

I. It favours glycogenesis

II. It favours fat synthesis and deposition

III. It favours protein anabolism

Hypersecretion of growth hormone in adults does not cause further increase in height because
1. growth hormone becomes inactive in adults
2. epiphyseal plates close after adolescence
3. bones loose their sensitivity to growth hormone in adults
4. muscle fibres do not grow in size after birth

A temporary endocrine gland in the human body is?

GnRH, a hypothalamic hormone, needed in reproduction, acts on the
1. anterior pituitary gland and stimulates secretion of LH and oxytocin
2. anterior pituitary gland and stimulates secretion of LH and FSH
3. posterior pituitary gland and stimulates secretion of oxytocin and FSH
4. posterior pituitary gland and stimulates secretion of LH and relaxin

Graves' disease is caused due to?
1. hyposecretion of thyroid gland
2. hypersecretion of thyroid gland
3. hyposecretion of adrenal gland
4. hypersecretion of adrenal gland

Name a peptide hormone which acts mainly on hepatocytes, adipocytes and enhances cellular glucose uptake and utilisation.
1. Insulin
2. Glucagon
3. Secretin
4. Gastrin