Question 18N.3.SL.TZ0.16
| Date | November 2018 | Marks available | [Maximum mark: 5] | Reference code | 18N.3.SL.TZ0.16 |
| Level | SL | Paper | 3 | Time zone | TZ0 |
| Command term | Discuss, Outline | Question number | 16 | Adapted from | N/A |
The bar chart shows the percentage loss of mass by various organs and tissues of the body of a person due to starvation. The overall body mass loss was 40 %.
Outline how the data indicate that protein was being used as an energy source.
[1]
loss of skeletal/heart muscle «containing protein» ✔
Outline the reason for such a high percentage reduction in mass of adipose tissue.
[2]
a. adipose tissue has a high energy value ✔
b. adipose tissue may be lost before affecting body metabolism/homeostasis ✔
c. body will use up adipose reserves first before using muscle and organs for energy ✔
Accept fat for adipose tissue
Discuss whether the mass losses shown in the bar chart could be due to anorexia nervosa.
[2]
a. loss of mass similar in anorexia and starvation ✔
b. loss could also be due to disease/feeding difficulties/other disorder/poverty/social unrest ✔
c. lack of food intake in anorexia nervosa due to emotional disorder
OR
desire to lose weight/refusal to eat characteristics of anorexia nervosa ✔
d. loss of «cardiac» muscle is characteristics of anorexia nervosa ✔