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 photograph... 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.
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
The student should ensure that the lines in his drawing are continuous and connected, avoiding sketchiness.
He should add labels and titles to clearly identify the different components of 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.
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
Blood vessel X is an artery/arteriole, and blood vessel Y is a vein/venule.
Step 3
Describe one feature that allowed you to identify the blood vessels.
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
The difference in lumen size is a significant feature; arteries generally have a narrower lumen compared to veins.
Step 4
Describe two precautions the student should take when clearing away after the dissection.
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
The student should carry or wash sharp instruments by holding the handle to prevent injuries.
He should disinfect instruments and surfaces to maintain hygiene.
