DP Biology (last assessment 2024)

Test builder »

Question 19M.3.SL.TZ1.15c.ii

Select a Test
Date May 2019 Marks available [Maximum mark: 1] Reference code 19M.3.SL.TZ1.15c.ii
Level SL Paper 3 Time zone TZ1
Command term Outline Question number c.ii Adapted from N/A
c.ii.
[Maximum mark: 1]
19M.3.SL.TZ1.15c.ii

Vitamin D deficiency can cause low blood calcium concentrations (hypocalcemia). Very low blood calcium can have an impact on heart function. The first ECG is for a patient with normal blood calcium concentrations. The second ECG is for a patient who has very low blood calcium concentrations.

[Source: © International Baccalaureate Organization 2019]

(c.ii)

Outline one event that occurs in the heart during the T wave.

[1]

Markscheme

a. repolarization of ventricles ✔ 

b. ventricles are in diastole/relaxation ✔

Examiners report

Many candidates did not know that ventricular diastole occurs during the T wave.

Syllabus sections