Nutrition chapter 4
A primary function of the digestive system is the
breakdown of food into nutrients
GI contains 2 musuclar layers
circular and longitinudial
Chyme moves from the stomach into the
duodenum
The ________ is a flap-like piece of tissue responsible for keeping a swallowed piece of food from entering the trachea.
epiglottis
leonard has a disease that causes his lacteals to become blocked. Based on this information, his
intestinal tract does not absorb much fat.
Marcus has an infection that causes a temporary loss of villi. Based on this information, you would expect Marcus to ________ while he has this illness
lose weight more rapidly
The ________ sphincter closes after a bolus has been swallowed and enters the stomach. This sphincter is essential to prevent the contents of the stomach reentering the esophagus.
lower esophageal
Inner most layer is called
mucosa
The ________ cells of the gastric glands are important to protect the lining of the stomach from damage.
mucous
the lining of the small intestine is covered with ________, tiny, finger-like structures that absorb nutrients from food.
vili
Which of the following foods typically acts as a prebiotic?
whole grains
Which of the following statements about sphincters is false?
When a sphincter relaxes, the passageway closes to prevent movement of GI contents.
The condition in which a person cannot taste any food is called
ageusia
Avi's salivary glands do not secrete amylase. As a result of his condition, his body
cannot start starch digestion
Dorothy is an 85-year-old woman who is having difficulty swallowing. Food seems to enter her stomach too slowly. Based on this information, Dorothy probably has a(n)
condition characterized by loss of peristaltic functioning.
Segmentation
helps mix chyme in the small intestine.
The ________ is important for transporting absorbed nutrients from the GI tract to the liver.
hepatic portal vein
Parietal cells secrete ions that form ________ in the stomach.
hydrochloric acid
Libby was born without salivary glands. As a result of this condition, she
has trouble tasting food
The ________ cells of the gastric glands synthesize and release intrinsic factor, which is necessary for vitamin B12 absorption.
parietal
Which of the following is not a function of cholecystokinin?
Control the secretion of mucus by the mucus cells