Chapter 44 Flashcards
Organisms categorized as osmoconformers are most likely
Organisms categorized as osmoconformers are most likely
marine.
The body fluids of an osmoconformer would be ________ with its ________ environment.
The body fluids of an osmoconformer would be ________ with its ________ environment.
isoosmotic; saltwater
The fluid with the highest osmolarity is
seawater in a tidal pool.
Birds that live in marine environments and thus lack access to fresh drinking water
drink seawater and secrete excess ions mainly through their nasal salt glands.
A human who has no access to fresh water but is forced to drink seawater instead
A human who has no access to fresh water but is forced to drink seawater instead
will excrete more water molecules than taken in, because of the high load of ion ingestion.
Freshwater fish excrete nitrogenous wastes as _____.
ammonia
The advantage of excreting nitrogenous wastes as urea rather than as ammonia is that
The advantage of excreting nitrogenous wastes as urea rather than as ammonia is that
urea is less toxic than ammonia.
The primary nitrogenous waste excreted by birds is
uric acid.
Which nitrogenous waste requires hardly any water for its excretion?
Which nitrogenous waste requires hardly any water for its excretion?
uric acid
In animals, nitrogenous wastes are produced mostly from the catabolism of
proteins and nucleic acids.
An appropriate group of animals to examine to observe a Malpighian tubule would be _____.
insects
An excretory system that is partly based on the filtration of fluid under high hydrostatic pressure is the
kidneys of vertebrates.
The transfer of fluid from the glomerulus to Bowman’s capsule
is mainly a consequence of blood pressure in the capillaries of the glomerulus.
Increased ADH secretion is likely after
sweating-induced dehydration increases plasma osmolarity.
Which of the following animals generally has the lowest volume of urine production?
a marine bony fish
