Which Gastrointestinal Hormone Is Released When the PH in the Duodenum

question 15

Multiple Choice

Which gastrointestinal hormone is released when the pH in the duodenum falls as acidic chyme arrives from the stomach?

• A) HCl
• B) gastric inhibitory peptide
• C) cholecystokinin
• D) secretin
• E) gastrin

---

Definitions:

Conditioned Response

A learned response to a previously neutral stimulus that becomes associated with a significant stimulus.

Conditioned Stimulus

A stimulus that has been associated with a particular response through conditioning, leading to its ability to elicit that response on its own.

Meat Powder

An example of a stimulus used in classical conditioning experiments, famously by Ivan Pavlov.

Conditioned Response

A learned response to a previously neutral stimulus that becomes significant through classical conditioning.