A professor has taught a class of students about the characteristics of vitamin B₁₂. Which statement by a student demonstrates a need for more education?
A)Vitamin B₁₂ is absorbed in the terminal ileum.
B)Vitamin B₁₂ is absorbed in its free (unbound) form in small amounts.
C)Vitamin B₁₂ is necessary for platelet maturation.
D)Vitamin B₁₂ binds to intrinsic factor.

Question

Quizplus · Accepted Answer

Most vitamin B₁₂ (cobalamin) is bound to intrinsic factor (making it resistant to digestion) and is absorbed in the terminal ileum, although a small amount of the vitamin is absorbed in its free (unbound) form. Vitamin B₁₂ is not necessary for platelet maturation. When a student makes this statement, the professor knows the student needs more education.

A Professor Has Taught a Class of Students About the Characteristics