Which of These Is a Function of Intrinsic Factor

question 90

Multiple Choice

Which of these is a function of intrinsic factor?

• A) It is secreted by salivary glands, and is necessary for digestion of vitamin B₁₂.
• B) It is secreted by parietal cells in the gastric mucosa, and its main function is causing insulin release.
• C) It is secreted in the stomach, and its main function is activating pepsinogen into pepsin.
• D) It is secreted by the small intestine mucosa, and its main function is initiating the intrinsic electrical activity of the pacemaker cells in the stomach.
• E) It is secreted in the stomach, and a deficiency of it would cause anemia.

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Definitions:

Semilunar Valves

Heart valves located at the exits of the right and left ventricles, preventing backflow of blood into the ventricles after contraction; they include the aortic and pulmonary valves.

Stethoscope

A medical instrument used for listening to the internal sounds of an organism, such as heart and lung sounds.

Terminal Branch

The terminal branch is the end part of a nerve or a blood vessel that does not continue further or branch out again.