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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

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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

  1. Use only single lines and ensure the lines are continuous and connected.
  2. Add labels, annotations, or a title to the drawing.

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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Answer

Blood vessel X: artery/arteriole Blood vessel Y: vein/venule

Step 3

Describe one feature that allowed you to identify the blood vessels.

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Answer

One feature is the difference in lumen size, where the artery has a smaller lumen compared to the vein.

Step 4

Describe two precautions the student should take when clearing away after the dissection.

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Answer

  1. Carry/wash sharp instruments by holding the handle to avoid injury.
  2. Disinfect instruments and surfaces properly to ensure sterility.

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