Figure 11 shows the time taken for blood to clot at different temperatures - Edexcel - GCSE Biology - Question 6 - 2020 - Paper 1
Question 6
Figure 11 shows the time taken for blood to clot at different temperatures.
temperature in °C
time taken for blood to clot in seconds
5 90
15 70
25 55
35 40
45 110
... show full transcript
Worked Solution & Example Answer:Figure 11 shows the time taken for blood to clot at different temperatures - Edexcel - GCSE Biology - Question 6 - 2020 - Paper 1
Step 1
Draw a graph to show the data in Figure 11.
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
To create a graph showing the data in Figure 11, follow these steps:
Linear Scale: Ensure that both the x-axis and y-axis are equally scaled, using a linear scale to represent temperature from 0°C to 50°C, and the time taken for blood to clot from 0 to 120 seconds.
Plot Data Points: Plot the following points on the graph based on the data given:
(5, 90)
(15, 70)
(25, 55)
(35, 40)
(45, 110)
Connect the Points: Draw accurate lines connecting the plotted points to visualize the trend of how temperature affects blood clotting time.
Step 2
Give two safety precautions that should be used when handling blood samples.
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Wear gloves: Always use disposable gloves to prevent direct contact with blood, reducing the risk of infection.
Wash hands: After handling blood samples, wash hands thoroughly to avoid contamination and the spread of pathogens.
Step 3
Which part of the blood causes blood to start clotting?
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
C. platelets
Step 4
Give one advantage of a blood clot forming.
98%
120 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
One advantage of a blood clot forming is that it helps to prevent excessive bleeding after an injury, thereby protecting the body from blood loss and facilitating healing.
Step 5
Explain how one structure of a vein helps the blood return to the heart.
97%
117 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
One key structure of a vein is the valve. Valves prevent backflow of blood, ensuring that it flows in one direction towards the heart, even against the forces of gravity in the extremities.
