What is physiologic adaptation, Biology

Assignment Help:

Physiologic Adaptation

Modeling is a surface specific activity (apposition or resorption) that produces a net change in the size and/or shape of the bone. It is an uncoupled process meaning that cell activation (A) proceeds independently to formation (F) or resorption (R). Modeling is the fundamental mechanism of growth, atrophy and re-orientation. Remodeling is defined as the turnover or the internal reconstructing of previously existing bone. It is a coupled tissue phenomenon. Activation of the precursor cells results in the following:

Activation (A)

Resorption (R)

Quiescence or reversal (Q)

Formation (F)

The duration of A - R(Q) - F remodeling cycle  is also referred to as the SIGMA CYCLE. It is about 6 weeks in rabbits, 12 weeks in dogs and 17 weeks in humans.

 


Related Discussions:- What is physiologic adaptation

Explain prostaglandins, Prostaglandins Prostaglandins belong  to a sub...

Prostaglandins Prostaglandins belong  to a subclass of  lipids known  as the eicosanoids because of their structural similarities to  the C-20  polyunsaturated  fatty acids, t

Transport into the cytosol, Fatty  acids  are  synthesized  in  the  cytoso...

Fatty  acids  are  synthesized  in  the  cytosol,  but  acetyl  CoA  is  produce  from pyruvate in the mitochondria. Therefore the acetyl CoA must be transferred  from  the mitocho

Gene organization, In marked contrast to prokaryotic genes where proteins a...

In marked contrast to prokaryotic genes where proteins are encoded by a continuous sequence of triplet codons and the vast popular of protein-coding genes in eukaryotes are discont

Define the iodine test - carbohydrates, Define the Iodine Test - Carbohydra...

Define the Iodine Test - Carbohydrates? This test is given by polysaccharides and is not given by monosaccharides or disaccharides. Principle Iodine forms a coloured ad

Define prevention of idd - double fortified salt, Define prevention of idd ...

Define prevention of idd - Double Fortified salt? iron deficiency anaemia and iodine deficiency disorders often co-exist, the most effective approach to control these public he

Blastocyst, Blastocyst is the developmental stage of fertilized ovum by th...

Blastocyst is the developmental stage of fertilized ovum by the time it is prepared to implant; formed from morula and comprises of an internal cavity, an inner cell mass, and an

What are blood stem cells, Q. What are blood stem cells? Stem cells are...

Q. What are blood stem cells? Stem cells are undifferentiated cells able to differentiate into other kinds of specialized cells. The stem cells of the bone marrow originate

What do you mean by nervous system, Q. What do you mean by Nervous System? ...

Q. What do you mean by Nervous System? Structural Organization:   CNS + PNS Functional Organization:   only concerned with PNS Sensory (Afferent) ->  CNS Motor (Effe

Explain glycogenolysis, Glycogenolysis Unlike glycogenesis, glycogenoly...

Glycogenolysis Unlike glycogenesis, glycogenolysis is the  breakdown of glycogen. Glycogen is  broken down  in  the  liver and muscle catalysed  by  the  enzyme glycogen phosph

Body fluids, why lymph is called the middel man of the body

why lymph is called the middel man of the body

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd