Chemical Coordination and Integration

Injury to adrenal cortex is not likely to affect the secretion of which one of the following?

1. Aldosterone
2. Both androstenedione and dehydroepiandrosterone
3. Adrenaline
4. Cortisol

Which one of the following pairs is incorrectly matched?

1. Glucagon – Beta cells (source)
2. Somatostatin – Delta cells (source)
3. Corpus luteum – Relaxin (secretion)
4. Insulin – Diabetes mellitus (disease)

Toxic agents present in food which interfere with thyroxine synthesis lead to the development of

1. toxic goitre
2. cretinism
3. simple goitre
4. thyrotoxicosis

Select the correct matching of a hormone, its source and function.

1. array|l|l|l| Hormone & Source & Function \ Vasopressin & Posterior pituitary & Increases loss of \ & & water through urine \ array
2. array|l|l|l| Hormone & Source & Function \ Norepinephrine & Adrenal medulla & Increases heart beat, \ & & rate of respiration and \ & & alertness \ array
3. array|l|l|l| Hormone & Source & Function \ Glucagon & Beta-cells of Islets of & Stimulates glycogenolysis \ & Langerhans & \ array
4. array|l|l|l| Hormone & Source & Function \ Prolactin & Posterior pituitary & Regulates growth \ & & of mammary glands \ & & and milk formation in \ & & females \ array

A health disorder that results from the deficiency of thyroxine in adults and characterised by (i) a low metabolic rate, (ii) increase in body weight and (iii) tendency to retain water in tissues is

1. simple goitre
2. myxoedema
3. cretinism
4. hypothyroidism.

Which one of the following pairs of organs includes only the endocrine glands?

1. Thymus and testes
2. Adrenal and ovary
3. Parathyroid and adrenal
4. Pancreas and parathyroid

The blood calcium level is lowered by the deficiency of

1. both calcitonin and parathormone
2. calcitonin
3. parathormone
4. thyroxine

In human adult females oxytocin:

1. causes strong uterine contractions during parturition
2. stimulates pituitary to secrete vasopressin
3. stimulates growth of mammary glands
4. is secreted by anterior pituitary

Feeling the tremors of an earthquake a scared resident of seventh floor of a multistoreyed building starts climbing down the stairs rapidly. Which hormone initiated this action?

1. Adrenaline
2. Glucagon
3. Gastrin
4. Thyroxine

A person is having problems with calcium and phosphorus metabolism in his body. Which one of the following glands may not be functioning properly?

1. Parotid
2. Pancreas
3. Thyroid
4. Parathyroid