What is the effect of GnRH produced by hypothalamus?
1. Stimulates the synthesis and secretion of androgens
2. Stimulates secretion of milk in mammary glands
3. Stimulates foetal ejection reflex
4. Stimulates synthesis of carbohydrates from non-carbohydrates in liver

Catecholamine in a normal person induces

1. intense salivation
2. alertness
3. decrease in heart beat
4. excessive urination

Match the source gland with its respective hormone and function and select the correct option.

       Source gland             Hormone          Function
1.  Anterior pituitary         Oxytocin          Contraction of uterine muscles

2. Anterior pituitary          Vasopressin      Induces reabsorption of water in nephron 

3. Thymus                      Thymosin          Proliferation of T-lymphocytes 

4. $\mathrm{\alpha }$-cells of islets           Glucagon           Uptake of glucose into the cell.
     of Langerhans

Select the correct statement about hormones and their actions.

1. Parathyroid hormone increases ${\mathrm{K}}^{+}$ absorption of the body.

2. Insulin and glucagon helps to maintain blood sugar levels.

3. Old aged people have weak immunity due to increased activity of thymus.

4. Osteoporosis in women occurs due to increased levels of oestrogens.

Gonadotropin releasing hormone is transferred to anterior pituitary by
1. left coronary artery
2. hypophyseal portal veins
3. axons of neurosecretory cells
4. nuclei of hypothalamus.

Which of the following represents the action of insulin?

1. Increases blood glucose level by stimulating glucagon production.

2. Decreases blood glucose level by forming glycogen. 

3. Increases blood glucose level by promoting cellular uptake of glucose.

4. Increases blood glucose level by hydrolysis of glycogen. 

Achondroplasia is a disease related with the defect in the formation of 

1. membrane

2. cartilage

3. mucosa

4. none of these

Which one of the following pairs is the matching pair of the part and the hormone it secretes?
1. Anterior pituitary - Thyroxine
2. Alpha cells of pancreas - Glucagon
3. Thyroid - Epinephrine
4. Stomach epithelium - Secretin

In the homeostatic control of blood sugar level, which organs function as modulator and effector respectively?

(1) Liver and islet of Langerhans

(2) Hypothalamus and liver

(3) Hypothalamus and islet of Langerhans

(4) Islet of Langerhans and hypothalamus

The 24 hour (diurnal) rhythm of our body such as the sleep-wake cycle is regulated by the hormone

1. calcitonin 

2. prolactin

3. adrenaline

4. melatonin