DIGESTION Flashcards
The TAKING OF FOOD into the digestive tract, generally THROUGH THE MOUTH.
Ingestion
The MECHANICAL AND CHEMICAL processes that convert nutrients into a PHYSICALLY ABSORBABLE STATE.
Digestion
Digestion includes:
Mastication
Deglutition
Peristalsis
chewing
Mastication
swallowing
Deglutition
COORDINATED, RHYTHMIC, SERIAL CONTRACTIONS of the smooth muscles of the Gastrointestinal tract
Peristalsis
The BREAKDOWN OF FOOD in the body inPREPARATION FOR ABSORPOTION.
Digestion
food is broken up BY TEETH and moved along Gastro Intestinal tract by peristalsis.
Mechanical digestion
carbohydrates, proteins, and fats are broken down INTO NUTRIENTS tissues can absorb and use.
Chemical digestion
Chemical changes occur through ________
hydrolysis
the ADDITION OF WATER and breaking down of food molecules
hydrolysis
act on food substances, causing them to break down INTO SIMPLE COMPOUNDS
Enzymes
An enzyme can act as a __________, which SPEEDS UP the chemical reactions without itself being changed in the process.
catalyst
The process by which the END PRODUCTS of digestion pass through the small and large intestines into the blood or lymph systems.
Absorption
The PASSAGE of nutrients into the blood or lymphatic system.
Absorption
TRUE OR FALSE:
Nutrients must be in their simplest form
TRUE
TRUE OR FALSE:
Nutrients must not be in their simplest form
FALSE
SIMPLE FORM:
Carbohydrates
simple sugars
SIMPLE FORM:
Proteins
amino acids
SIMPLE FORM:
Fats
fatty acids and glycerol
Most absorption occurs in the ________
small intestine
some absorption occurs in the ________
large intestine
________ is absorbed in the stomach, small intestine, and large intestine.
Water
Digestion BEGINS HERE
Teeth break up food; food mixes with saliva
Mouth
acts on starch
Enzyme (salivary amylase)
enzyme is also known as
(salivary amylase)
is a complex carbohydrate
starch
is a MASTICTAED LUMP OR BALL OF FOOD ready to be swallowed
BOLUS
Length of time food is in mouth is ______
brief
Food travels through this MUSCULAR TUBE; Connects mouth to stomach
Esophagus
_______ act to move bolus in the esophagus
Peristalsis and gravity
opens at LOWER END OF ESOPHAGUS to allow passage of bolus into stomach
Cardiac sphincter
Temporary storage of food
Mixing of food with gastric juices
Regulation of a slow, controlled emptying of food into the intestine
Secretion of the intrinsic factor for vitamin B12
Destruction of most bacteria inadvertently consumed
Stomach
prepares the gastric area for enzyme action
Hydrochloric acid