Biology Questions and Answers
- How does the pancreatic
juice help the digestion of
lipids? What is the involved
enzyme?
The enzyme pancreatic lipase in the pancreatic juice. This enzymeis present
breaks triacylglycerol (triglyceridfatty acids and glycerol. e) into
- Besides the pancreatic
juice in the intestine there is
the releasing of the enteric
juice that contains digestive
enzymes too. What are these
enzymes and which type of
molecule do each of these
enzymes break?
The enteric juice is secreted by thesmall intestine mucosa. The enzymes of (^)
the enteric juice and their respective
functions are described as follows:
Enterokinase: enzyme that activates
trypsinenzyme that bogen into trypsin. Saccharase:reaks sucrose
(saccharose) into glucose and fructose.
Maltase: einto two glucose molnzyme that becules. Lactase:reaks maltose
enzyme that band galactose.reaks lactose Peptidases: e into glucosenzymes
that break oligopeptides into amino
acids. Nuclebreak nucleotides into otidases: Enzymes thatits components (^)
(nitrogen-containing bases, phosphates
and pentoses).
- Coming from the acid pH
of the stomach which pH level
does the chyme find when it
enters the duodenum? Why is
it necessary to maintain that
pH level in the small intestine?
What are the organs
responsible for that pH level
and how is it kept?
Entering the duodenum the chymemeets the pancreatic juice under a pH (^)
of approximately 8.5. of the chyme acidity is necessary toThe neutralization
keep adequate pH level for the
functioninthat act in the duodenum. Without tg of the digestive enzymeshe (^)
neutralization of the chyme acidity the
mucous memwould be injured.brane of the intestine
When stimulated bthe duodenum maky the chymes a hormone callede acidity (^)
secretin. Secretin stimulates the
pancreas to rand also the gallbladder to expel bile inelease the pancreatic juice
the duodenum. The pancreatic
secretion, rich ireleased in the duodenum andn bicarbonate ions, is
neutralizes the chyme acidity; this
acidity issecretion o also neutralizef bile in the duodenal lumd by the (^) en.
- What are the five human
digestive secretions? Which of
them is the only pne that does
not contain digestive
enzymes?
The human digestive secretions arsaliva, gastric juice, bile, pancreatice:
juice and enteric juice. Among these
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