A student dissected an organ from a mammal to observe blood vessels - AQA - A-Level Biology - Question 4 - 2021 - Paper 1
Question 4
A student dissected an organ from a mammal to observe blood vessels.
He dissected a slice of the organ and identified two blood vessels.
Figure 4 shows a photograp... show full transcript
Worked Solution & Example Answer:A student dissected an organ from a mammal to observe blood vessels - AQA - A-Level Biology - Question 4 - 2021 - Paper 1
Step 1
Suggest two ways the student could improve the quality of his scientific drawing of the blood vessels in this dissection.
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Answer
The student should use continuous, single lines to create the drawing instead of sketching with broken lines, ensuring clarity.
He could add labels and annotations to his drawing to provide clearer information about each blood vessel.
Step 2
Identify the type of blood vessel labelled as X and the type of blood vessel labelled as Y in Figure 4.
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Describe one feature that allowed you to identify the blood vessels.
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Answer
The feature that allowed me to identify the blood vessels was the difference in lumen size; the artery (X) had a smaller lumen compared to the vein (Y).
Step 4
Describe two precautions the student should take when clearing away after the dissection.
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Carry or wash sharp instruments by holding the handle to avoid cuts.
Disinfect the surfaces and instruments used during the dissection.
