digestion and absorption Flashcards
1
Q
Suggest how a rabbit eating its own caecal droppings helps a rabbit’s digestion and absorption of dietary protein
A
- more undigested protein broken down
- more amino acids absorbed
- because protein passes again through ileum
2
Q
The action of carrier protein X (Na+/K+ pump) is linked to a membrane bound ATP hydrolase enzyme. Explain the function of this ATP hydrolase.
A
- ATP hydrolysed into ADP + Pi releases energy
- for active transport of Na+/K+ ions
3
Q
The movement of Na+ out of the cell allows absorption of glucose into the cell lining the ileum
Explain how
A
- Na+ conc gradient created
- Na+ moving in by facilitated diffusion brings glucose with it
4
Q
Use your knowledge of lipid digestion to explain why concentration of triglycerides decreased. Assume no absorption occurred.
A
- decrease in triglycerides due to lipase action
- decrease in triglycerides due to hydrolysis
- decrease in triglycerides due to hydrolysis of ester bonds