DP Biology (first assessment 2025)

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Question 22N.1A.SL.TZ0.26

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Date November 2022 Marks available [Maximum mark: 1] Reference code 22N.1A.SL.TZ0.26
Level SL Paper 1A Time zone TZ0
Command term Question number 26 Adapted from N/A
26.
[Maximum mark: 1]
22N.1A.SL.TZ0.26

The diagram shows a staggered transverse section (cut across rather than down) through the heart.

[Source: Oregon State University, n.d. Heart Anatomy. [diagram online] Available at:
https://open.oregonstate.education/aandp/chapter/19-1-heart-anatomy/ [Accessed 28 October 2021].]

 

In what state are the valves when the ventricles are contracting?

[1]

Markscheme

B

Examiners report

It was commented that the diagram of the heart seen from above may be more challenging compared to the usual images depicted in books and examinations and this was intended. One centre commented that it is difficult to distinguish between the R and L semilunar valves, but this is not necessary to answer the question. Statistically the question discriminated well.

Syllabus sections