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Three Phases of Gastric Secretion (Quiz 2)

Why does gastric secretion start before the food reaches the stomach? Everyone has had the experience of involuntarily reacting to the smell or taste of food. Saliva forms in the mouth and gastric secretions begin in the stomach. Why should digestion begin before the food has been consumed? If digestive fluids are already present when food arrives in the stomach then the process of digestion can occur more quickly. Also, efficient digestion depends on the thorough mixture of food and digestive fluids. As the digestive fluids are already present when the food arrives then mixing can occur in a more efficient manner.

View the animation below, then complete the quiz to test your knowledge of the concept.






1Gastric secretion begins during the ________ phase and ends during the ________ phase.
A)cephalic ; gastric
B)cephalic ; intestinal
C)gastric ; cephalic
D)gastric ; intestinal
E)intestinal ; gastric



2The hormone ________ stimulates the secretion of the hormone ________ in the stomach.
A)gastrin ; pepsin
B)gastrin ; secretin
C)gastrin ; cholecystokinin
D)pepsin ; secretin
E)pepsin ; gastrin



3________stimulation via the ________ nerve causes the secretion of HCl in the stomach.
A)Sympathetic ; gastric
B)Sympathetic ; vagus
C)Sympathetic ; trigeminal
D)Parasympathetic ; gastric
E)Parasympathetic ; vagus



4Cholecystokinin, which is produced in the small intestine, inhibits gastric secretions in the stomach.
A)True
B)False



5Secretin is released from the duodenum in response to acidic chyme.
A)True
B)False







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