Digestion And Absorption

Question 0

Define appetite

Answer 0

Psychological drive for food

Question 1

Define hunger

Answer 1

Physiological drive for food

Question 2

Define anorexia

Answer 2

Physiological need for food but no appetite

Question 3

Which part of the brain triggers feelings of hunger or satiation?

Answer 3

Hypothalamus

Question 4

Where does most digestion and absorption occur?

Answer 4

Small intestine

Question 5

Name the key hormones involved in digestion (4)

Answer 5

Gastrin
CCK
Gastric inhibitory peptide
Secretin

Question 6

What is the role of CCK?

Answer 6

Signals gallbladder to release bile (which emulsifies fat)

Question 7

In the stomach which enzyme begins to digest lipids?

Answer 7

Gastric lipase

Question 8

Where is alcohol absorbed?(2)

Answer 8

80% small intestine

20% stomach

Question 9

How does a high fibre diet reduce cholesterol?(4)

Answer 9

Fibre binds to bile
Both are exerted in the faeces
Less cholesterol is reabsorbed from (less) remaining bile
Blood cholesterol are reduced

Question 10

How does a low fibre diet increase cholesterol?(4)

Answer 10

Less fibre present to bind to bile
Less bile is excreted in the faeces
More cholesterol reabsorbed
Blood cholesterol are elevated