Castration cells are found in 

1. adenohypophysis

2. pars intermedia

3. hypothalamus 

4. pars nervosa.

Study the given figure showing various human endocrine glands. Select the correct statement(s) regarding these.

(i) Gland P is stimulated to secrete its hormones by thyrotropin secreted by anterior lobe of pituitary gland.

(ii) Gland R is associated with the secretion of hormones corticosteroids, epinephrine and norepinephrine.

(iii) Glands T and U represent the sex glands, which are derived from the mesoderm of embryo.

(iv) Gland Q is derived from mesoderm of the embryo and its increased size results in ageing.

(v) Gland S secretes the hormone glucagon which stimulates the liver to convert glucose into glycogen.

1. (i) and (ii)                 

2. (ii) and (iv)

3. (i), (ii) and (iii)           

4. All are correct

Name the hormone associated with the metabolism of phosphorus and calcium ?

1. glucocorticoids

2. mineralocorticoids

3. calcitonin

4. glucagon

Which of the following match is correct
     Hormone                       Effect
1. Oxytocin                    Milk ejection hormone
2.Glucagon                    Decreases blood sugar level
3. Adrenaline                  Decreases heart rate
4. Thyroxine                  Decreases BMR    

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

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

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