Two skeletal system processes that are constantly taking place include the resorption of existing bone and formation of new bone. The bone disorder that results from low bone mineral density is osteoporosis and involves an imbalance between these two processes. Which of the following is not likely to cause osteoporosis? A.
excess bone resorption and inadequate formation
B.
excess bone formation and inadequate resorption
C.
poor calcium absorption into bone
D.
excess calcium release into blood

Explanation: osteoporosis occurs when there is an imbalance between bone formation and  bone resorption.

hydroxyl -oh

alcohols, always polar, can form hydrogen bonds with h2o molecules

carboxyl -cooh  

cargoxylic acids, has acidic properties which is a source of hydrogen ions, found in cells in ionized for with a charge of oh-1

carbonyl > co

ketone if within skeleton, aldehyde if group is at the end of skeleton, k & a may be structural isomers, it determines 2 sugars (ketose & aldose)

amino -nh2

amines, acts as a base, it can pick up h+ ions from surrounding solution, ionized with charge of 1+

methyl ch2

addition to rna/dna affects and gene expression

phosphate -opo3 ²⁻

organic phosphates, contributes to negative charge to, molecule that it is a part of, and potential to react with h20

sulfhydryl -sh

thiols, cross-linking stabilize the protein, and it is structure