Excretion

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40 Terms

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Tubules
________ secrete nitrogenous wastes and salts from the hemolymph; water follows the solutes by.
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Reabsorption
________: occurs simultaneously with secretion.
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Excretion
________: process by which metabolic wastes are eliminated.
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Molecules
________ remaining in the plasma are selectively removed (penicillin) from the peritubular capillaries & secreted into the filtrate.
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Freshwater fish
________: gain water and lose salt when ventilating gills.
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Osmoconformers
________: match osmolarity of blood and other fluids to seawater at 1000 mOsm /L.
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Nephrostome
________ drains the metamere just anterior to the one in which the metanephridium is located.
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Saltwater fish
________: gain salts and lose water across gills.
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Uric acid
________ is synthesized by the insect's tissues and released in soluble form.
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Kidneys
________ produce copious dilute urine.
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extracellular compartments
Animals with a closed circulatory system have two ________- interstitial fluid and blood plasma.
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Osmoregulators
________: maintain constant internal salt concentrations and osmolarities.
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Intracellular fluid
________: inside cell.
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Interstitial compartment
________: bathing tissues & returning to blood.
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Secretion
________: filtrate is passed through the renal tubule.
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Animals
________ with an open circulatory system have an extracellular compartment containing hemolymph which bathes the cells.
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Interior fluids
________ are filtered as they pass through the perforations in the flame bulb's cells.
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Wastes
________ either diffuse out of body or are excreted into the gastrovascular cavity.
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Na+ Pump
________: sodium ions are actively pumped across the membrane and Cl- follow passively by electrostatic attraction.
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majority of cells
The ________ in most animals (all but sponges and cnidarians) are not exposed to the external environment, but are bathed by an extracellular fluid.
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tubule
Each ________ possesses a nephrostome, collecting ________, and a nephridiopore.
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Excretion
________: remaining fluids leave the nephron and pass into the renal pelvis (funnel of the ureter) and travel to bladder until released through the urethra.
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uric acid
The ________ is absorbed by the Malpighian tubules and the low pH in the tubule lumen causes ________ to precipitate out as dry matter.
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Animals with a closed circulatory system have two extracellular compartments
interstitial fluid and blood plasma
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Saltwater fish
gain salts and lose water across gills
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Freshwater fish
gain water and lose salt when ventilating gills
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Specialized gill epithelial cells transport Na+ and Cl
from water into fishs capillaries
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Osmoregulators
maintain constant internal salt concentrations and osmolarities
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Osmoconformers
match osmolarity of blood and other fluids to seawater at 1000 mOsm/L
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Excretion
process by which metabolic wastes are eliminated
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Plasma compartment
blood plasma
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Interstitial compartment
bathing tissues & returning to blood
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Intracellular fluid
inside cell
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Protonephridium
platyhelminthes & nematodes
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Metanephridium
annelids
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Na+, Cl
and other solutes reabsorbed                                     along tubule
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Filtration
filtrate is forced out of glomerulus & received by Bowmans capsule
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Reabsorption
occurs simultaneously with secretion
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Secretion
filtrate is passed through the renal tubule
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Excretion
remaining fluids leave the nephron and pass into the renal pelvis (funnel of the ureter) and travel to bladder until released through the urethra