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The Execretory System
Biology 1 Honors
12
Biology
10th Grade
04/12/2011

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Term
produces urine, filters blood (plasma) and regulates body's balance of water, blood pressure, and level of salt in blood
Definition
What is the function of the kidneys?
Term
nephron
Definition
What is the functional unit of the kidney?
Term
glomerulus
Definition
main filter of the nephron and is located within the Bowman's Capsule; semipermeable--allows water and soluble wastes to pass through and be excreted as urine; filters plasma of blood and content; does NOT filter RBC
Term
proximal convoluted tube
Definition
filtrate flows through here; sodium, water, amino acids, and glucose are reabsorbed here
Term
loop of henle
Definition
descending and ascending limbs
Term
descending limb
Definition
limb that is permeable for only water
Term
ascending limb
Definition
limb that is permeable for only sodium ions
Term
distal convoluted tube
Definition
where potassium and additional toxins are secreted; additional water is reabsorbed
Term
collecting duct
Definition
connects nephron to ureters; becomes permeable to water in prescence of ADH
Term
urine; bladder
Definition
What do kidneys produce? Where is it stored?
Term
ureters
Definition
transport urine from kidney to the bladder
Term
urethra
Definition
the tube that carries urine from bladder out of the body
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