Calculate value X in Table 4 - AQA - GCSE Biology - Question 6 - 2010 - Paper 1
Question 6
Calculate value X in Table 4.
X = 3600
06.2
Describe the relationship between the size of a jellyfish and its surface area to volume ratio.
As the size increases,... show full transcript
Worked Solution & Example Answer:Calculate value X in Table 4 - AQA - GCSE Biology - Question 6 - 2010 - Paper 1
Step 1
Calculate value X in Table 4.
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
X = 3600
Step 2
Describe the relationship between the size of a jellyfish and its surface area to volume ratio.
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
As the size increases, the surface area to volume ratio decreases.
Step 3
Name one other substance that enters cells by diffusion.
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
One other substance is glucose.
Step 4
Suggest two factors that affect the rate of diffusion of oxygen into a jellyfish.
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
Concentration gradient
Surface area
Step 5
Name the organs where gas exchange takes place in fish.
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
The organs are gills.
Step 6
Explain how the human breathing system is adapted to maximise the rate of gas exchange.
97%
121 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The human breathing system has a large number of alveoli, which increases the surface area for gas exchange. The alveoli walls are thin, reducing the diffusion distance for oxygen and carbon dioxide. Additionally, a rich blood supply ensures that oxygen is continually transported away, maintaining a steep concentration gradient necessary for efficient gas exchange. Finally, ventilation allows for a constant flow of air in and out, further optimizing the gas exchange process.
