PCAT: Digestive System || with 100% Errorless Solutions.
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Module
PCAT: Digestive System
Institution
PCAT: Digestive System
Extracellular digestion correct answers Digestion that occurs outside of the cell, within a lumen or tract
Heterotrophic correct answers Organisms that are unable to construct their own food from inorganic sources, and therefore must consume other organisms or organic molecules from the outside ...
PCAT: Digestive System || with 100% Errorless Solutions.
Extracellular digestion correct answers Digestion that occurs outside of the cell, within a lumen
or tract
Heterotrophic correct answers Organisms that are unable to construct their own food from
inorganic sources, and therefore must consume other organisms or organic molecules from the
outside environment. Function as consumers or decomposers in food chains. (Ex: humans)
Ingested correct answers Eat; swallow or take in
Digestion correct answers Breakdown of food
Intracellular digestion correct answers Digestion that occurs within the cell, usually in
membrane-bound vesicles
Digestive Tract correct answers Begins with the oral cavity, then pharynx, esophagus, stomach,
small intestine, large intestine, and finally the anus
Accessory organs (salivary glands, pancreas, liver, gallbladder) also play important roles
Oral Cavity correct answers The mouth; where mechanical and chemical digestion of food
begins
Mechanical digestion correct answers Breakdown of large food particles through physical action
like mastication or churning of stomach
Mastication correct answers Biting and chewing action of teeth
Chemical digestion correct answers Enzymatic breakdown of macromolecules into small
molecules; begins in the mouth where salivary glands secrete saliva
Saliva correct answers Secreted by salivary glands in response to a nervous reflex triggered by
the presence of food in the oral cavity; lubricates food to ease swallowing and provides a solvent
for food particles
Salivary amylase correct answers Aka ptyalin; hydrolyzes starch to maltose (a disaccharide)
Bolus correct answers Food that has been sufficiently moistened and broken down to be
swallowed in the esophagus
Esophagus correct answers Muscular tube leading from the mouth to the stomach
Peristalsis correct answers Moves food down the esophagus via rhythmic waves of involuntary
muscular contractions
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