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Multiple Choice
Which statement does not pertain to the cephalic phase of gastric secretion?
A
It is triggered by the sight, smell, and thought of food.
B
It involves the direct stimulation of gastric glands by food in the stomach.
C
It is primarily controlled by the vagus nerve.
D
It involves the release of gastric juices before food enters the stomach.
Verified step by step guidance
1
Understand the cephalic phase of gastric secretion: This phase is the initial stage of digestion, triggered by sensory stimuli such as sight, smell, and thought of food, even before food enters the stomach.
Identify the role of the vagus nerve: The cephalic phase is primarily controlled by the vagus nerve, which stimulates the release of gastric juices in anticipation of food intake.
Differentiate between phases of gastric secretion: The cephalic phase does not involve direct stimulation of gastric glands by food in the stomach; this occurs in later phases such as the gastric phase.
Recognize the function of gastric juices: During the cephalic phase, gastric juices are released to prepare the stomach for digestion, even though no food has yet entered the stomach.
Determine the statement that does not pertain to the cephalic phase: The statement 'It involves the direct stimulation of gastric glands by food in the stomach' does not pertain to the cephalic phase, as this occurs in the gastric phase.