alleryIn humans, the ascending limb of Henle is impermeable to water mainly because
ATight junctions block all water transit
BAquaporin channels are absent in it
CAldosterone insertion of channels here
DADH closes existing water channels there
Answer & Solution
Correct answer: B. Aquaporin channels are absent in it
The thick ascending limb lacks aquaporins, so water cannot follow Na+ and Cl-.
This dissociation between solute and water transport is the key to building the medullary osmotic gradient.
Keep practising Unit 6A: Toxicology, Infectious Diseases and Environmental Hazards
Browse all Unit 6A: Toxicology, Infectious Diseases and Environmental Hazards questions for AP Intermediate 1st Year, or explore more Environmental Science topics.
Related questions
Uraemia refers toRenal calculi are typically formed byThe vasa recta arises fromAtrial Natriuretic Factor (ANF) is released by theThe Bowman's capsule visceral layer is composed of specialised cells calledADH (vasopressin) acts mainly on theProtonephridia (flame cells) are the excretory structures ofAldosterone secreted by the adrenal cortex acts on the DCT to