The gallbladder stores and concentrates ________ .
Bile
What part of the intestinal tract prevents backflow of food from the stomach into the esophagus?
esophageal sphincter
As a(n) ________ , an enzyme does not change its chemical structure while promoting other chemical reactions.
Catalyst
What transport process accounts for the absorption of water?
Simple Diffusion
Which gastrointestinal hormone stimulates secretion of the components of hydrochloric acid?
gastrin
Gastrointestinal bacteria in the body ________ .
assist in the production of vitamins
Which process best describes the action of the pancreas with respect to digestive secretions?
Bicarbonate is released to neutralize gastric activity
The inner surface of the small intestine ________ .
Is covered with intestinal projections called villi
Which energy nutrients benefit most by thorough chewing before swallowing?
Carbohydrates
What organ is the first to receive nutrients that have been absorbed from the digestive tract?
liver
What kind of nutrients does the lymphatic system carry to the bloodstream?
Fats and fat - soluble vitamins
At what pH level do the gastrin-producing cells stop secreting gastrin into the stomach?
1.5
Which nutrients take longer for your body to digest than others?
fats and proteins
The cartilage in the throat that guards the entrance to the trachea and prevents fluid of food from entering it when a person swallows is known as the ________ .
epiglottis
What term applies to the wavelike muscular contractions that move food along the digestive tract?