[Campbell Biology P.964] Based on Figure 41.22 and the accompanying text, which of the follo... | Practice Question

Based on Figure 41.22 and the accompanying text, which of the following statements accurately describes the hormonal control of digestion initiated by the duodenum?

  • A: Secretin stimulates the pancreas to release digestive enzymes, while CCK stimulates the release of bicarbonate.
  • B: Both secretin and CCK stimulate the stomach to produce more gastric juices.
  • C: The presence of acidic chyme in the duodenum triggers the release of secretin, which then stimulates the pancreas to release bicarbonate to neutralize the chyme.
  • D: Cholecystokinin (CCK) primarily promotes the reabsorption of water in the large intestine.

Explanation

Figure 41.22 and the accompanying text clearly state that secretin, released from the duodenum in response to acidic chyme, stimulates the pancreas to release bicarbonate HCO3- , which helps neutralize the chyme. CCK stimulates the release of digestive enzymes and bile.