Gce Model Questions Vol1 2018 Biology Question 3
Practice objective / multiple choice question 3 from the 2018 Gce Model Questions Vol1 Biology examination.
Blood flow through a small artery can be approximated by Poiseuille's law \(Q = \frac{\pi \Delta P r^{4}}{8 \eta L}\). The artery has a radius of 0.5 mm, length 10 cm and blood viscosity \( \eta = 3.5 \times 10^{-3}\) Pa·s. If the radius is reduced by 20 % due to vasoconstriction while the pressure gradient \(\Delta P\) and length remain unchanged, what is the percentage change in the flow rate \(Q\)?
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About This Question
This is Gce Model Questions Vol1 2018 Biology Question 3. It is one of the objective questions from the 2018 Gce Model Questions Vol1 Biology examination.
Difficulty level: Medium .
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