Name: _______________________________________________
Unit 5 Biology past paper questions
Date:
Time:
Total marks available:
Total marks achieved: ______
,Questions
Q1.
The cardiac output of the patient's heart is investigated.
The heart beats 70 times in a minute.
The stroke volume of each contraction is 0.075 litres (L).
Calculate the cardiac output of the patient's heart.
cardiac output = ........................................................... L minute−1
(Total for question = 2 marks)
Q2.
Figure 1.7 shows changes in blood pressure in the aorta and the left ventricle during the cardiac cycle.
Figure 1.7
Calculate the heart rate using information from Figure 1.7.
Show your working.
, ........................................................... beats per minute
(Total for question = 3 marks)
Q3.
The actual diameter of a healthy alveolus is 0.2 mm.
The observed diameter of the healthy alveolus, in another photomicrograph, is 10 mm.
Calculate the magnification of the image.
Show your working.
(2)
........................................................... ×
(Total for question = 2 marks)
Q4.
A student investigated the effect of caffeine on the heart rate of the water flea, Daphnia.
Figure 3 shows a Daphnia and the location of its heart.
, The student placed a Daphnia in a Petri dish containing pond water.
The student observed the Daphnia under a light microscope.
The student counted the number of Daphnia heartbeats per minute when the Daphnia was in pond water
containing differing concentrations of caffeine.
The results are shown in Table 2.
Unit 5 Biology past paper questions
Date:
Time:
Total marks available:
Total marks achieved: ______
,Questions
Q1.
The cardiac output of the patient's heart is investigated.
The heart beats 70 times in a minute.
The stroke volume of each contraction is 0.075 litres (L).
Calculate the cardiac output of the patient's heart.
cardiac output = ........................................................... L minute−1
(Total for question = 2 marks)
Q2.
Figure 1.7 shows changes in blood pressure in the aorta and the left ventricle during the cardiac cycle.
Figure 1.7
Calculate the heart rate using information from Figure 1.7.
Show your working.
, ........................................................... beats per minute
(Total for question = 3 marks)
Q3.
The actual diameter of a healthy alveolus is 0.2 mm.
The observed diameter of the healthy alveolus, in another photomicrograph, is 10 mm.
Calculate the magnification of the image.
Show your working.
(2)
........................................................... ×
(Total for question = 2 marks)
Q4.
A student investigated the effect of caffeine on the heart rate of the water flea, Daphnia.
Figure 3 shows a Daphnia and the location of its heart.
, The student placed a Daphnia in a Petri dish containing pond water.
The student observed the Daphnia under a light microscope.
The student counted the number of Daphnia heartbeats per minute when the Daphnia was in pond water
containing differing concentrations of caffeine.
The results are shown in Table 2.
