A-Level Edexcel Biology AS Solving Algebraic Equations

A-Level Edexcel Biology AS Solving Algebraic Equations
Pearson Edexcel International Advanced Subsidiary/Advanced Level in Biology, Issue 2, February 2021Biology XBI11/YBI11

Review A-Level Edexcel Biology solving algebraic equations through cardiac-output calculations that compare resting heart rates from table data.

How this is tested

  • solve cardiac-output equations to compare heart rates with units and decimal places

Question 4(b)

[Maximum number: 3]

Many people swim as part of their regular exercise.

Regular swimming affects resting heart rate and cardiac output.

 cardiac output = stroke volume × heart rate \text { cardiac output }=\text { stroke volume × heart rate }

The table shows the mean resting cardiac output and mean resting stroke volume for a group of regular swimmers and a control group.

Table for Question 4(b) — Edexcel A-Level Biology AS

Using the data in the table, calculate the difference in resting heart rate between these two groups.

Give your answer to 2 decimal places with appropriate units.