DP Biology (last assessment 2024)
Question 18M.3.HL.TZ2.22b
| Date | May 2018 | Marks available | [Maximum mark: 2] | Reference code | 18M.3.HL.TZ2.22b |
| Level | HL | Paper | 3 | Time zone | TZ2 |
| Command term | Suggest | Question number | b | Adapted from | N/A |
b.
[Maximum mark: 2]
18M.3.HL.TZ2.22b
The graph shows the relationship between the maximum heart rate during exercise and a person’s age.
(b)
Suggest reasons for the change in maximum heart rate with increasing age.
[2]
Markscheme
a. muscles become less elastic
OR
less muscle tone
b. cells/mitochondria less efficient
c. more fat deposits
OR
blood/oxygen supply to heart tissue reduced
Accept other valid documented answers.
