1 A2/A-level resources Search within results Go How ratings and recommendations work Apply Filter resourcesClear all filtersLevelClear filter A2/A-level Subject Biology Exam board WJEC TopicClear filter Human, animal and plant behaviour Human, animal and plant physiology Loop of Henle The Kidney The Nephron Resources Revision Notes Formation of a Salt Bath in the Loop of Henle A2/A-level, Biology Revision notes 4.0 / 5 Search again