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A-LevelBiologyTransport in mammals9700/12 · May/June 2014 · Q261 Mark

What is not a factor influencing blood pressure?

Athe diameter of the blood vessels

Bthe number of red blood cells in circulation

Cthe systolic pressure of the heart ventricles

Dthe volume of blood returning to the heart each heart beat

✓ Correct answer

B: the number of red blood cells in circulation

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About this question

Topic: Transport in mammals, A-Level Biology (syllabus 9700). Multiple choice, 1 mark.
Source: A-Level Biology, May/June 2014 Paper 1 Variant 2, question 26.

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