Explain the role of the loop of Henle in producing concentrated urine.
Na+ ions are actively transported from ascending limb this lowers the water potential in the medulla water diffuses out go the descending limb, but not the ascending limb as it is impermeable water also leaves the collecting duct by osmosis
MH
Related Biology A Level answers
All answers ▸The black mamba’s toxin kills prey by preventing their breathing. It does this by inhibiting the enzyme acetylcholinesterase at neuromuscular junctions. Use your knowledge of muscle contraction to explain how this prevents breathing.
Describe the process of DNA replication.
How is glucose absorbed by the body?
How does the heart pump blood around the body?