Calcitriol, Popularly Known as the Active Form of Vitamin D

question 82

Multiple Choice

Calcitriol, popularly known as the active form of vitamin D, is a hydrophobic hormone. Which of the following is most likely to be a correct statement about calcitrol signaling?

• A) Calcitriol binds to a transporter to cross the membrane.
• B) Calcitriol binds to plasma membrane receptors.
• C) Calcitriol forms hormone-receptor complexes in the cytoplasm.
• D) Calcitriol exerts its effects by stimulating an intracellular second messenger system.

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Definitions:

Average Inventory

A metric that estimates the amount of inventory a business has on hand over a certain period, calculated by taking the sum of the beginning and ending inventory levels divided by two.

Periodic Inventory System

An inventory accounting system where updates to inventory levels are made on a periodic basis, as opposed to continuously.