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

How is l. monoctogenes infection transmitted, How is L. monoctogenes infect...

How is L. monoctogenes infection transmitted? Listriosis caused by Listeria monocytogenes infection. Transmitted by animal excretions (faecal matter) and secretions, infecte

How do cam plants vary from both c3 and c4 plants, How do CAM plants vary f...

How do CAM plants vary from both C 3 and C 4 plants? CAM plants open their stomata at night, while C 3 and C 4 plants open their stomata during the day.

Neurons - nervous system, Neurons - Nervous System Although neurons oc...

Neurons - Nervous System Although neurons occur in a great variety of sizes and morphological forms, they have a basic plan of structure representing certain common characteri

What is the endocrine function of the placenta, Q. What is the endocrine fu...

Q. What is the endocrine function of the placenta? The placenta besides being the organ through which the exchange of substances between the fetus and the mother is done also h

What is glands, What is Glands? The central nervous system controls muc...

What is Glands? The central nervous system controls much of the endocrine system through the hypothalamus. The hypothalamus directs many of the body's functions through the "ma

What is dextrin, Dextrin  Polymers of D-glucose, formed due to partial ...

Dextrin  Polymers of D-glucose, formed due to partial  hydrolysis of starch by enzymes.

Explain surviving implants, What is Surviving Implants It is a term des...

What is Surviving Implants It is a term described by Albrektsson that applies to implants that are still in function but have not been tested against success criteria. Such as

What is a closed circulatory system, Q. Define a closed circulatory system?...

Q. Define a closed circulatory system? A closed circulatory system is one in which blood circulates only inside blood vessels for this reason the blood pressure is higher in so

What is mean by stability study, Stability studies are req. for the product...

Stability studies are req. for the product stable at their desire time as per specification , which give the expiry date and quality as per the manner.

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