Summary
Summary terminology of excretion
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Terminology and definitions of excretion explained and unpacked. All you need to know.
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T E R M I N O L O G Y:Active absorption: absorption of substances against the concentration
gradient using energy
ADH: the hormone secreted by the pituitary that plays a role in
osmoregulation
Aldosterone: the hormone secreted by the adrenal glands the regulate
the absorption of salts
Ascending limb: a part of the loop of Henl of the renal tubule of the
nephron which carries wastes from the hairpin bend towards the distal
convoluted tubule
Bowman’s capsule: cup-shaped structure surrounding the glomerulus
of the nephron in the human kidney
Calyx: wide funnel-like structure found in the kidney into which the
collecting tubules open
Descending limb: a part of the loop of Henl of the renal tubule of the
nephron which carries wastes from the proximal convoluted tubule
towards the hairpin bend
Dialysis: a method of artificially removing waste products from the
bloodstream if the kidneys are unable to do so on their own
Distal convoluted tubule: the twisted portion of the renal tubule that is
furthest away from the Malpighian body
Duct of Bellini: tubes formed by the union (joining) of the collecting
ducts in the kidney
Excretion: removal of waste products of metabolism from cells
Filtration: the process by which water and small solutes, including
metabolic wastes, are extracted from the body fluid and passed into the
excretory system
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