Gce Model Questions Vol1 2017 Biology Question 4

Practice objective / multiple choice question 4 from the 2017 Gce Model Questions Vol1 Biology examination.

Gce Model Questions Vol1 2017 Biology Objective / Multiple Choice Medium Difficulty
Question 4 GCE_MODEL_QUESTIONS_VOL1 • 2017 • BIOLOGY • objective

In a branch of an artery the radius narrows from 2.0 mm to 1.5 mm while the length of the segment and the blood viscosity remain unchanged. Assuming the pressure gradient driving the flow is constant, use Poiseuille's law to determine: a) the percentage increase in vascular resistance, b) the percentage change in blood flow rate through the segment.

Answer Options

A. Resistance increases by about 150 %; blood flow decreases by about 40 %.
B. Resistance increases by about 180 %; blood flow decreases by about 60 %.
Correct Answer C. Resistance increases by about 216 %; blood flow decreases by about 68 %.
D. Resistance increases by about 250 %; blood flow decreases by about 75 %.
Correct Answer
C
Correct Option:
Resistance increases by about 216 %; blood flow decreases by about 68 %.

About This Question

This is Gce Model Questions Vol1 2017 Biology Question 4. It is one of the objective questions from the 2017 Gce Model Questions Vol1 Biology examination.

Difficulty level: Medium .

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