Question

ii
Explain how the structure of a red blood cell helps it to carry out this function.
[3]
6 The diagram shows how the volume of the left ventricle changes over a time period of 1.3 seconds.
A
B
Volume of
left ventricle
0
0.1
0.2
0.3
0.4
0.5
0.6
1.0
1.1
1.2
1.3
1.4
1.5
1.6
0.7 0.8 0.9
Time in seconds
a
b
[1]
[2]
[3]
с
d
How many complete heart beats are shown in the diagram?
i Use the graph to calculate how long one heart beat takes. Show your working.
ii Use your answer to bi to calculate the heart rate. Show your working.
Describe what is happening between points A and B on the graph.
Describe how the valves between the atria and ventricles help to ensure a one-way flow of blood
through the heart.
Make a copy of the graph shown above. On your graph, sketch a line to show the volume of
the right ventricle during this time period.
[3]
[2]

Answer 1

Answer:

ठपछष ओशो चनफखष चसवख गबटष जहाज बटन ठोस बटन बटन बटन बटन कोश बठोषजचन ठोस कदम बटन फॅ पेश ट

Answer 2

Answer:

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