Which of the following statements regarding glucagon is false?
1. It is secreted by $\mathrm{\alpha }$-cells of Langerhans.
2. It acts antagonistically to insulin. 
3. It decreases blood sugar level.
4. The gland responsible for its secretion is heterocrine gland

A patient of diabetes mellitus excretes glucose in urine even when he is kept in a carbohydrate free diet. It is because:-

1. fats are catabolised in adipose tissues to form glucose

2. amino acids are catabolised in kidney to form glucose

3. amino acids are discharged in blood stream from liver

4. glycogen from muscles is released in blood stream

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

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. 

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

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

A gland called ‘Clock of ageing’ that gradually reduces and degenerates in ageing is

1. thyroid
2. thymus
3. parathyroid
4. pituitary