How can we help?

You can also find more resources in our Help Center.

69 terms

nutrition test 4

digestion/absorption
STUDY
PLAY
cephalic response
where/when does digestion begin
epiglottis
what structure prevents food from entering the trachea when you swallow
portal vein
which large vessel is the first to receive most recently eaten nutritents, transporting them to the liver
liver
blood leaving the intestine goes by way of a vein to the
lymphatic
after digestion and absorption, which circulatory system carries fat and fat soluble vitamins
it picks up and transports dietary lipids
which of the following is a feature of the lympatic system
it is important for transporting fat soluble nutrients
which of the following is true about the lymphatic system
is the first GI tract sphincter
all the following are features of the epiglottis except it
small intestine
most digestion takes place in the
sphincters
the ring like muscles that retard or prevent backflow or partially digested food in the gastrointestinal tract are called
controls passage of food through the GI tract
which of the following is a function of sphincter muscles
ileocecal
waht sphincter separates the small intestine from the large intestine
prevents intestinal contents from backing up into the stomach
what is the function of the pyloric sphincter
pyloric sphincter
the stomach empties into the small intestine through the
duodenal
which of the following is not a sphincter
a watery mixture of partially digested food released by the stomach into the intestines
which of the following is a description of chyme
protects gastrointestinal cells from gastric juices
what is the function o mucus in the stomach
bile
what substance helps suspend fat in a watery digestive mixture, making fat more available to digestive enzymes
pancreas and small intestine
where are the most digestive enzymes produced
proteins
which of the following, upon digestion, is not normally released directly into the blood stream
liver
which of the following body organs produces bile
muscular movement of materials through the GI tract
peristalsis refers to
top of the esophagus
where does peristalsis begin
lungs
which of the following is not considered part of the GI tract
mucin
saliva, secreted by special glands int he mouth, contains
95
what percent of a meal has been absorbed by the time it leaves the small intestine
root beer
all of the following can weaken esophageal sphincer tension and promote heartburn except
enzymes
these protein based substances enhance digestion by making chemical reactions more likely to happen
enzymes that work in the acidic environment of the stomach cannout work in the basic or alkaline environment of the small intestine and vice versa
which of the following is true about digestive enzymes
an ulcer
excessive acid production in the stomach or upper small intestine could result in
sustained absorption
absorption of nutrients by intestinal cells occurs by all of the following mechanisms except
acidic
which pH best describes the environment of the stomach when stimulated
protect stomach cells from acid and enzymes
the function of this mucus in the stomach is to
bicarbonate
the hormone secretin responds to food entering the small intestine and stimulates the pancreas to release
chyme
partially digested food that enters the small intestine from the stomach is called
pancreatic juices
which of the following substances is primarily involved in the emulsification of fat to facilitate its digestion
it is produced by the liver
which of the following is true regarding bile
small intestine
the most active area for absorption of nutrients into the body is the
provide an enormous surface area that facilitates absorption
the villi of the small intestine
from an area of higher concentration to one of lower concentration
in passive absorption, nutrients enter the cell
water soluble nutrients are transported through the portal system to the liver
which of the following is true of nutrient transport
water and minerals
a function of the large intestine is to absorb
eating dietary fiber, appropriate fluid intake, and engaging in physical exercise
constipation can best be prevented by
eating smaller meals that are lower in fat
which of the following is an important dietary recommendation for avoiding heartburn
carbohydrates
fibers belong to the class of nutrients known as
dietary fiber
which of the following are substances in plant foods that are not digested in the stomach or small intestine
sucrose
which of the following products of digestion are not normally released into the bloodstream
pancreatic amylase
what enzyme is responsible for carbohydrate digesetion in the small intestine
mouth with salivary amylase
carbohydrate digestion begins in the
an enzyme that digests starch
amylase is
they pass into the colon and are fermented by bacteria
what is the fate of disaccharides not digested in the small intestine
starch to maltose to glucose
which of the following shows the process of starch digestion
active absorption
glucose is absorbed via
maltose is transported through the portal vein to the liver
which of the following is not true of carbohydrate absorption
lactose deficiency
lactose intolerance is caused by
gas, abdominal pain, and distention
the major symptoms of lactose intolerance are
liver
which organ will receive sugars after they absorbed in the blood
glycerol and fatty acids
when triglycerides are digested, before being absorbed, they are converted to a mixture of
are reformed into triglycerides
after absorption, long-chain fatty acids and monoglyceride inside intestinal cells
pancreatic lipase
the major fat digesting enzyme is
fatty acids of less than 12 carbons eneter the blood and then the liver via the portal vein
which of hte following is true about the fate of fatty acids after their absorption
lipoproteins
to be transported throughout the body, fats are packaged in structures called
lymphatic
after chylomicrons leave the intestinal cells, they are transported via what system
carbohydrate
lipoproteins contain the following components except
pepsin
what enzyme is released by the stomach to digest protein
pepsin works best in an alkaline environment
which of the following is not true about pepsin
man whole proteins are absorbed and enter the blood
which of the following is not true about the events during and after absorption of protein digestive breakdown products
denaturation
cooking an egg alters its appearance due to
stomach and small intestine
proteins are chemically digested in which areas of the body