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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 photo... 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.
Answer
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The student could use continuous lines for better clarity and avoid sketching, ensuring the lines are connected.
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Adding appropriate labels and a title to the drawing would enhance understanding.
Step 2
Identify the type of blood vessel labelled as X and the type of blood vessel labelled as Y in Figure 4.
Answer
Blood vessel X is an artery/arteriole. Blood vessel Y is a vein/venule.
One feature that allowed identification includes: Blood vessel X has a thicker wall and smaller lumen compared to blood vessel Y, which has a thinner wall and larger lumen.
Step 3