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Created page with "==Key Stage 4 Higher== right|300px|thumb|A [[diagram of a kidney showing the nephrons.]] ===Meaning=== The '''nephrons''' are small struc..."
==Key Stage 4 Higher==
[[File:KidneyDiagramKS4.png|right|300px|thumb|A [[diagram]] of a [[kidney]] showing the [[nephron]]s.]]
===Meaning===
The '''nephrons''' are small structures in the [[kidney]]s which control which [[substance]]s are removed from the [[blood]] stream.
===About Nephrons===
: There are millions of [[nephron]]s in each [[kidney]].
: The [[nephron]]s respond to a [[hormone]] called [[Anti-diuretic Hormone|anti-diuretic hormone (ADH)]].
: When [[Anti-diuretic Hormone|ADH]] is detected the by the [[kidney]]s the tubules in the [[nephron]]s allows [[water]] from the tubules back into the [[blood]] through the [[capillaries]] in the [[nephron]]. This causes the [[organism]] to produce very little, but highly [[concentrated]] [[urine]].
: When there is little [[Anti-diuretic Hormone|ADH]] the tubules in the [[kidney]]s stop the [[water]] being reabsorbed into the [[blood]] and allow it to pass out through the [[ureter]]s into the [[bladder]]. This causes the [[organism]] to produce a large [[Volume (Space)|volume]] of [[dilute]] [[urine]].
[[File:KidneyDiagramKS4.png|right|300px|thumb|A [[diagram]] of a [[kidney]] showing the [[nephron]]s.]]
===Meaning===
The '''nephrons''' are small structures in the [[kidney]]s which control which [[substance]]s are removed from the [[blood]] stream.
===About Nephrons===
: There are millions of [[nephron]]s in each [[kidney]].
: The [[nephron]]s respond to a [[hormone]] called [[Anti-diuretic Hormone|anti-diuretic hormone (ADH)]].
: When [[Anti-diuretic Hormone|ADH]] is detected the by the [[kidney]]s the tubules in the [[nephron]]s allows [[water]] from the tubules back into the [[blood]] through the [[capillaries]] in the [[nephron]]. This causes the [[organism]] to produce very little, but highly [[concentrated]] [[urine]].
: When there is little [[Anti-diuretic Hormone|ADH]] the tubules in the [[kidney]]s stop the [[water]] being reabsorbed into the [[blood]] and allow it to pass out through the [[ureter]]s into the [[bladder]]. This causes the [[organism]] to produce a large [[Volume (Space)|volume]] of [[dilute]] [[urine]].