Chemical Coordination and Integration

Which one of the following pairs of chemical substances, is correctly categorised?

• Calcitonin and thymosin - Thyroid hormones

• Pepsin and prolactin - Two digestive enzymes secreted in stomach

• Troponin and myosin - Complex proteins in striated muscles

• Troponin and myosin - Complex proteins in striated muscles

Erythropoiesis starts in 

• kidney

• liver

• spleen

• spleen

A chemical signal that has both endocrine and neural roles is?

• melatonin

• calcitionin

• epinephrine

• epinephrine

Match the source gland with its respective hormone as well as the function.

• Source gland	Hormone	Function
  Posterior pituitary	Vasopressin	Stimulates resorption of water in the distal tubules in the nephron

• Source gland	Hormone	Function
  Corpus luteum	Oestrogen	Supports pregnancy

• Source gland	Hormone	Function
  Thyroid	Thyroxine	Regulates blood calcium level

• Source gland	Hormone	Function
  Thyroid	Thyroxine	Regulates blood calcium level

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

• Calcitonin

• prolactin

• adrenaline

• adrenaline

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

• Aldosterone

• Both androstenedione and dehydroepiandrosterone 

• Adrenalin

• Adrenalin

Which one of the following pairs is incorrectly matched?

• Glucagon - Beta cells (source)

• Somatostatin - Delta cells (source)

• Corpus luteum - Relaxin (secretion)

• Corpus luteum - Relaxin (secretion)

The nerve centres which control the body temperature and the urge for eating are contained in 

• hypothalamus

• pons

• cerebellum

• cerebellum

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

• toxic goitre

• cretinism 

• simple goitre

• simple goitre

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

• Hormone	Source	Function
  Vasopressin	Posterior Pituitary	Increases loss of water through urine

• Hormone	Source	Function
  Norepinephrine	Adrenal medulla	Increases heartbeat, rate of respiration and alertness

• Hormone	Source	Function
  Glucagon	Beta-cells of Islets of Langerhans	Stimulates glycogenolysis

• Hormone	Source	Function
  Glucagon	Beta-cells of Islets of Langerhans	Stimulates glycogenolysis