Author: Lindsey Delve
Last saved by: Gemma Archibald

Carmel College

Animal Transport Maths Hw  
NAME ___________________________ Tutor___________  MEG_____________

Q1.The table shows the volume of blood in a woman’s left ventricle at different times during one second.
 
| Time / seconds | Volume of blood in left ventricle / cm^3
| 0.0 | 112
| 0.1 | 120
| 0.2 | 95
| 0.3 | 65
| 0.4 | 50
| 0.5 | 55
| 0.6 | 82
| 0.7 | 90
| 0.8 | 100
| 0.9 | 112
| 1.0 | 120

(a)     Use the data in the table to calculate the heart rate in beats per minute.
Tick (✔) one box next to the correct answer.
 
| 60 |
| 66.7 |
| 75 |
| 85.7 |

(1)
 (b)     The stroke volume is the volume of blood pumped out of the left ventricle during one cardiac cycle.
Use the table above to determine the stroke volume.				

Stroke volume =................................... cm^3
(1)

Q2.          The table shows the relative thickness of layers in the walls of an artery and a vein.
 
| Layer in wall | Thickness / µm
| | Artery | Vein
| Endothelium | 20 | 20
| Smooth muscle | 490 | 240
| Elastic tissue | 370 | 240
| Connective tissue | 120 | 120

(ii)     The diameter of the artery was 4 mm. Calculate the diameter of the lumen of this artery. Show your working.
 
Answer .................................
(2)

Q3.Scientists investigated the effect of a 6-week exercise programme on the resting heart rate of males and females.
The scientists recruited a large group of male volunteers and a large group of female volunteers. They measured the resting heart rate of each volunteer before the exercise programme. Both groups took part in the same exercise programme. The scientists measured the resting heart rate of each volunteer after the exercise programme.
The scientists determined the mean resting heart rate and the range of resting heart rates for each group before and after the exercise programme. The graph shows their results.

(a)     What was the range of the resting heart rates in males after the exercise programme?
........................................................................................................................
(1)

(b)     Calculate the percentage decrease in the mean resting heart rate of females after the exercise programme. Show your working.

Answer = ............................ %
(2)

(c)     The scientists used the percentage change in the mean resting heart rate after the exercise programme to compare the results for males and females.
Explain why they used percentage change in the resting heart rate.
........................................................................................................................
........................................................................................................................
........................................................................................................................
 (2)

Q4.          (a)     The table shows some data for a shrew and an elephant.
 
| | Shrew | Elephant
| Body mass | 10 g | 5000 kg
| Volume of oxygen taken up per hour | 20 cm^3 | 52.5 dm^3
The rate of oxygen uptake for the shrew is 2 cm^3g^–1h^–1. Calculate the volume of oxygen taken up per gram of body tissue per hour in the elephant.
Show your working.

 
Answer ................................... cm^3g^–1h^–1					(2)
Q5.          The diagram shows a cross-section of an artery.

(c)     Calculate the cross-sectional area of the lumen of the artery shown in the diagram. Show your working.
The area of a circle is given by πr^2, where r is the radius of a circle (π = 3.14).

        Answer ................................... mm^2
(3)
Q6.          When a stethoscope is placed on the chest wall, sounds are heard as the heart beats. These heart sounds are caused by valves shutting. The diagram shows the heart sounds from a resting person.

The sounds labelled A on the diagram are made by the closing of the valves at the entrance to the arteries. 

In this person, the stroke volume is 70 cm^3. Calculate the cardiac output. Show your working.

 
Cardiac output ............................... cm^3 per minute   			   (2)  
 Q7.The figure below shows recordings made from the heart of a dog.
 
                        Time / seconds
 
                        Time / seconds
 
                        Time / seconds

(c)     Use the figure to calculate the heart rate of the dog in beats per minute.
Show your working.

 
 
Heart rate ........................................... beats per minute
(2)
(Total 6 marks)

Q8.     The table shows the cardiac output and resting heart rate of an athlete before and after completing a training programme.
 
| | Before training | After training
| Cardiac out/cm^3 | 5000 | 5000
| Resisting heart rate/beats per minute | 70 | 55
 
(i)      Calculate the athlete’s stroke volume after training. Show your working.
.............................. cm^3
(2)

Q9. The graph shows oxygen dissociation curves for the haemoglobin of a mother and her fetus.

Partial pressure of oxygen (pO_2) / kPa
(b)     What is the difference in percentage saturation between the haemoglobin of the mother and her fetus at a partial pressure of oxygen (pO_2) of 4 kPa?
 
(1)