Chapter 19, Problem 23RA

Summary Introduction

To review:

The following:

1. The reason behind considering vitamin D as both a vitamin and a prehormone.

2. The role of vitamin D consumption in osteoporosis.

Introduction:

The chemical secretions of the endocrine glands are known as hormones. They are directly released into the blood from where they get transported to their target sites. The hormones regulate metabolic activities through positive and negative feedback mechanisms. Osteoporosis is a condition where the density and the quality of bones get reduced and may also result in a fracture.