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Date November 2017 Marks available 3 Reference code 17N.3.SL.tz0.12
Level Standard Level Paper Paper 3 Time zone time zone 0
Command term Outline Question number 12 Adapted from N/A

Question

Outline how appetite is regulated after eating.

[3]
a.

Analyse type 2 diabetes.

[3]
b.

Markscheme

hormones are produced by the stomach and small intestine ✔

hormone «leptin» secreted by fat cells/adipose tissue ✔

hormones enter the blood stream ✔

hormones/leptin/ghrelinact on the appetite control centre ✔

leptin inhibits eating/causes satiety✔

ghrelin increases the desire to eat ✔

a.

type 2 diabetes is the inability to use insulin/ insulin target cells are less sensitive/ insulin resistant ✔

type 2 most often occurs in obese people who are over age 35 / older people/ caused by inactivity/ poor diet ✔

type 2 is increasing in children «due to poor diet and low levels of physical activity» ✔

type 2 can be controlled by diet/exercise / weight loss / oral medication / insulin ✔

type 2 is more common than type 1 ✔

b.

Examiners report

Generally done well – sometimes the hormones involved were mixed up.

a.

This was understood very well.

b.

Syllabus sections

Option C: Physical activity and health » C.3. Physical activity and obesity. » C.3.4. Outline how chemical signals arising from the gut and from the adipose tissue affect appetite regulation.
Option C: Physical activity and health » C.3. Physical activity and obesity.
Option C: Physical activity and health

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