Question 17N.2.HL.TZ0.b
| Date | November 2017 | Marks available | [Maximum mark: 2] | Reference code | 17N.2.HL.TZ0.b |
| Level | HL | Paper | 2 | Time zone | TZ0 |
| Command term | Deduce | Question number | b | Adapted from | N/A |
The graph shows the effect of hypoxia on the endurance of rats’ diaphragm muscle after 6 weeks. Endurance is the change in force measured as a percentage of the initial force.
[Source: Reproduced with permission of the © ERS 2011. European Respiratory Journal June 2011, 37 (6) 1474–1481; DOI: 10.1183/09031936.00079810]
Using the data in the graph, deduce whether hypoxia increases or decreases the endurance of the rats’ diaphragm muscle.
[2]
a. increases endurance «in relation to the control»
b. higher force/endurance at every testing time/throughout
OR
smaller decreases in force «over time»
c. the magnitude of the difference is similar throughout the five minutes experiment/testing
d. differences are «statistically» significant
e. endurance of control is «approximately» 35 % versus endurance of hypoxia «approximately» 55 % «after 5 minutes»
Accept ±5 % for both percentages
[Max 2 Marks]
