DP Biology (last assessment 2024)
Question 18M.3.HL.TZ2.b
| Date | May 2018 | Marks available | [Maximum mark: 2] | Reference code | 18M.3.HL.TZ2.b |
| 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.b
The hematocrit is the volume percentage fraction of erythrocytes in blood.
Suggest how high altitude could lead to polycythemia.
[2]
Markscheme
a. more erythrocytes/hemoglobin produced to compensate
b. low oxygen «partial» pressure «at high altitude»
c. lower oxygen saturation «of hemoglobin at high altitude»
d. less oxygen carried to tissues/hypoxia
