1b Disorders of Appetite

Question 1

What is the definition of polydipsia?

Answer 1

Excessive thirst or excess drinking

Question 2

What is the definition of Adipsia?

Answer 2

Inappropriate lack of thirst

Question 3

What is anorexia?

Answer 3

Lack or loss of appetite

Question 4

What is obesity?

Answer 4

Abnormal or excessive fat accumulation which presents a risk to health

Question 5

Which hormone is responsible for the regulation of osmolarity?

Answer 5

ADH

Question 6

If plasma concentration of ADH is low, will there be diuresis or anti-diuresis?

Answer 6

Low ADH = dilute urine = alot of water loss = diuresis

Question 7

Which regions are sensory osmoreceptors found in the hypothalamus?

Answer 7

Supraoptic nuclei and paraventricular nuclei

Question 8

What are some causes of primary polydipsia?

Answer 8

Mental illness - psychogenic polydipsia
Brain injury
organic brain damage

Question 9

What is secondary polydipsia?

Answer 9

Medical issues which disrupt any step in osmoregulation or alter ADH

Question 10

Which medical conditions can cause secondary polydipsia?

Answer 10

ADH deficiency or resistance
Kidney Failure
Conn’s syndrome
Addison’s disease
Sickle Cell Anaemia