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36 terms

ch 21

STUDY
PLAY
which one of the following is false
the animals that extract food particles suspended in the surrounding water are called fluid feeders
what happens to the nutrient macromolecules in an animals digestive track
nutrient macromolecules are digested to monormers before absorpbtion
which of the following organisms have a gastrovascular cavity
hydra
the main function of a gizzard is to
grind food
an alimentary canal is best defined as
a tube shaped digestive compartment that has two openings and through which food moves in one direction
which of the following choices lists the organs of the bird digestive system in the correct order
esophagus crop stomach gizzard intestine anus
which of the following correctly lists the order of the organs of the human digestive system
oral cavity pharynx esophagus stomach small intestine large intestine
smooth muscle propels food through the alimentary canal proccess called
peristalsis
movement of food from the stomach into the esophagus is usually prevented by
the pyloric sphincter
human saliva performs all of the following functions except
hydrolizing proteins
the heimlich maneuver is perfomed to forcibly
elevate the diaphragm
what is epiglottis
a flap of cartilage that flips own to cover the entry to the trachea during swallowing
which of the following is the usual case of heartburn
reflux of acid chyme from the stomach into the lower asophogus
the parietal cells of the stomachs gastric glands secrete
pepsin
which of the following mechanisms does not help [prevent the gastric juice from digesting the stomach lining?
gastrin converts pepsin into pepsinogen by a chain reaction
stomach mixes the food with the secretions of the stomach wall to form
a parietal bolus
the function of the pyloric sphincer is to
release acid chyme into the duodenum in periodic squirts
the epithilial cells lining the intestine have surface projections that increase the area for absorbtion. these projections are called
microvilli
proteins are digested by which of the following enzymes
chymotrypsin
what is the main digestive function of the pancreas
it produces idigestive enzymes and bile salts
altogether, the body secretes about 7 liters of water into the alimentary canal each day what percentage of the water is absorbed
90 percent
all animals must obtain
essential nutrieds fuel to powere all body activities organic raw materials
all of choices are correct <
which of the following statemetns is false
humans store some extra energy in the form of glycogen reserves in the pancreas and spleen
organisms suffering from malnourishement
one or more essential nutrients
which of the following is not an essential nutrient
water
certain amino acids are called essenetial because they
cannot be made from other amino acids by the animal in quesiton.
which of the folloiwing vitamins is fat soluble
K
which of the following is not a characteristic of a vitamin
vitamins can serve as co enzymes
which of the following choices does not pair a mineral necessary in the diet with one of its major functions in the body?
sulfer- component of certain amino acids
a person on a fad diet experiences muscle crams and weakness. after talling with other persons about the unusual diet, a physision supspects the person most likely is suffering from a deficiency of
table salt
the minimal standards for preventing nutrient deficincies are called the
RDA's
a food label indicates that the contents contatin 12 grams of carbohydrate per serving. how many grams of digestible complex carbs are there per serving of this food item
3
which one of the following is a homorne produced by adiposte cells and which normally helps to control appetites
pepsin
which of the following is not widely regarded as a healthy approach to dieting
trimdaily carbs back to less than 20 grans oer day
to reduce ones risk of cancer, one should minumize consumption of
moldy food bacon red meat cured and smoked foods
= all of the above
which one of the following is associated with a reduced risk of cardiovascular disease
high levels of hdl