need serious help with this gcse biology question
read the following information about how the small intestine absorbs sugars.
- the blood absorbs glucose and some other sugars, like xylose, from the small intestine.
- glucose molecules are the same size as xylose molecules, but glucose is absorbed more quickly than xylose.
- experiments with a small piece of intestine shows that the uptake of oxygen by the intestine is 50% higher in the presence of glucose then in the absence of glucose. xylose does not have this effect on the uptake of oxygen
- the cells lining the small intestine have many mitochondria,
explain how this information provides evidence that glucose is absorbed by the small intestine by active transport.
- the blood absorbs glucose and some other sugars, like xylose, from the small intestine.
- glucose molecules are the same size as xylose molecules, but glucose is absorbed more quickly than xylose.
- experiments with a small piece of intestine shows that the uptake of oxygen by the intestine is 50% higher in the presence of glucose then in the absence of glucose. xylose does not have this effect on the uptake of oxygen
- the cells lining the small intestine have many mitochondria,
explain how this information provides evidence that glucose is absorbed by the small intestine by active transport.
Reply 1
Original post
by not_my_name101read the following information about how the small intestine absorbs sugars.
- the blood absorbs glucose and some other sugars, like xylose, from the small intestine.
- glucose molecules are the same size as xylose molecules, but glucose is absorbed more quickly than xylose.
- experiments with a small piece of intestine shows that the uptake of oxygen by the intestine is 50% higher in the presence of glucose then in the absence of glucose. xylose does not have this effect on the uptake of oxygen
- the cells lining the small intestine have many mitochondria,
explain how this information provides evidence that glucose is absorbed by the small intestine by active transport.
- the blood absorbs glucose and some other sugars, like xylose, from the small intestine.
- glucose molecules are the same size as xylose molecules, but glucose is absorbed more quickly than xylose.
- experiments with a small piece of intestine shows that the uptake of oxygen by the intestine is 50% higher in the presence of glucose then in the absence of glucose. xylose does not have this effect on the uptake of oxygen
- the cells lining the small intestine have many mitochondria,
explain how this information provides evidence that glucose is absorbed by the small intestine by active transport.
1. Selective absorption:
-Compare the sizes of the two molecules.
-What would happen with simple diffusion?
-What does a different speed indicate?
2. Increased energy consumption:
-Why is more oxygen needed for glucose?
-What is produced by cellular respiration?
-What kind of transportation needs energy?
3. Abundance of mitochondria:
-What is the function of mitochondria?
-Why do cells have so many?
-Which cellular process requires a lot of energy?
Conclusion: Connect the three pieces of evidence to explain the absorption mechanism.
Ciao,
Sandro
Reply 2
Original post
by NitrotolueneEvidence of active glucose transport:
1. Selective absorption:
-Compare the sizes of the two molecules.
-What would happen with simple diffusion?
-What does a different speed indicate?
2. Increased energy consumption:
-Why is more oxygen needed for glucose?
-What is produced by cellular respiration?
-What kind of transportation needs energy?
3. Abundance of mitochondria:
-What is the function of mitochondria?
-Why do cells have so many?
-Which cellular process requires a lot of energy?
Conclusion: Connect the three pieces of evidence to explain the absorption mechanism.
Ciao,
Sandro
1. Selective absorption:
-Compare the sizes of the two molecules.
-What would happen with simple diffusion?
-What does a different speed indicate?
2. Increased energy consumption:
-Why is more oxygen needed for glucose?
-What is produced by cellular respiration?
-What kind of transportation needs energy?
3. Abundance of mitochondria:
-What is the function of mitochondria?
-Why do cells have so many?
-Which cellular process requires a lot of energy?
Conclusion: Connect the three pieces of evidence to explain the absorption mechanism.
Ciao,
Sandro
ty.
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