In vitamin D metabolism, which metabolite is stored in the liver as storage form?

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $24.99Unlock all

Prepare for the CMS II Rheumatology E1 Exam with our comprehensive quiz. Study using flashcards and multiple-choice questions, each with hints and explanations. Get ready for success!

Multiple Choice

In vitamin D metabolism, which metabolite is stored in the liver as storage form?

Explanation:
The key idea is that the liver stores vitamin D as a 25-hydroxylated metabolite, 25(OH)D. This form serves as the body's reservoir and is the circulating pool from which the kidney can produce the active hormone when needed. The 25-hydroxy forms (whether from vitamin D2 or D3) are storage-ready, whereas the 1,25-dihydroxy forms are the hormonally active versions and are not stored long-term. In this set, the option that represents the storage form is 25(OH) vitamin D2. Remember that both 25(OH)D2 and 25(OH)D3 reflect stored vitamin D, but the 25-hydroxy form in general is the storage metabolite, not the active 1,25(OH) forms.

The key idea is that the liver stores vitamin D as a 25-hydroxylated metabolite, 25(OH)D. This form serves as the body's reservoir and is the circulating pool from which the kidney can produce the active hormone when needed. The 25-hydroxy forms (whether from vitamin D2 or D3) are storage-ready, whereas the 1,25-dihydroxy forms are the hormonally active versions and are not stored long-term.

In this set, the option that represents the storage form is 25(OH) vitamin D2. Remember that both 25(OH)D2 and 25(OH)D3 reflect stored vitamin D, but the 25-hydroxy form in general is the storage metabolite, not the active 1,25(OH) forms.

More Multiple Choice Questions
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy