NEW
Font size
WorksheetsOsmoregulation and Excretion
Total questions: 15
Worksheet time: 30mins
The force driving simple diffusion is ________, while the energy source for active transport is________.
the concentration gradient; ADP
the concentration gradient; ATP
transmembrane pumps; electron transport
phosphorylated protein carriers; ATP
To maintain homeostasis, freshwater fish must ________.
excrete large quantities of electrolytes
consume large quantities of water
excrete large quantities of water
take in electrolytes through simple diffusion
The body fluids of an osmoconformer would be ________ with its ________ environment
hyperosmotic; freshwater
hyperosmotic; seawater
isoosmotic; seawater
hypoosmotic; seawater
Which nitrogenous waste has the greatest number of nitrogen atoms?
ammonia
ammonium ions
urea
uric acid
The advantage of excreting nitrogenous wastes as urea rather than as ammonia is that________.
urea can be removed as a semi-solid paste
urea is less toxic than ammonia
urea does not affect the osmotic gradient
less nitrogen is removed from the body
Animals that migrate great distances would obtain the greatest energetic benefit of storing chemical energy as ________.
proteins
minerals
carbohydrates
fats
In a hydra, digestion is completed ________.
intracellularly
extracellularly
in the alimentary canal
in the gastrovascular cavity
Because the foods eaten by animals are often composed largely of macromolecules, animals need to have mechanisms for ________.
dehydration synthesis
enzymatic hydrolysis
regurgitation
demineralization
The process by which digested dietary substances cross cell membranes to be used by the body is known as ________.
ingestion
digestion
hydrolysis
absorption
The large surface area in the gut directly facilitates ________.
secretion
absorption
filtration
temperature regulation
In the digestive system, peristalsis is ________.
a process of fat emulsification in the small intestine
voluntary control of the rectal sphincters regulating defecation
the transport of nutrients to the liver through the hepatic portal vessel
smooth muscle contractions that move food along the esophagus
Among mammals, it is generally true that ________.
all types of foods begin their enzymatic digestion in the mouth
after leaving the oral cavity, the bolus enters the larynx
the epiglottis prevents swallowed food from entering the trachea
the trachea leads to the esophagus and then to the stomach
The digestion of ________ begins in the stomach.
protein
fat
nucleic acids
carbohydrates
Pepsinogen is converted to its active form in the stomach by ________.
HCl
chief cells
high pH conditions
parietal cells
Cattle are able to survive on a diet consisting almost entirely of plant material because cattle____________.
are autotrophic
re-ingest their feces
manufacture all fifteen amino acids out of sugars in the liver
have cellulose-digesting, symbiotic microorganisms in chambers of their stomachs
