Adaptive mechanisms, Biology

Assignment Help:

The adaptive mechanisms may be short term ones which come into play within minutes or hours of the onset of myocardial dysfunction. These are:

Frank-Starling Mechanism

In the Frank-Starling mechanism increased preload helps in sustaining cardiac performance. Starling's law essentially means that stroke volume is related to the end-diastolic volume. Frank proposed that the greater initial left ventricular volume leads to more rapid rate of rise of pressure, greater peak pressure and faster rate of relaxation. So the Frank-Starling law accounts for increased inotropic state and increased diastolic filling.

Neuro Hormones

Activation of neurohumoral systems resulting in release of noradrenaline leading to augmentation of myocardial contractility.

Renin-Angiotensin-Aldosterone System

Activation of renin-angiotensin-aldosterone system which helps in maintaining arterial pressure and perfusion of vital organs.


Related Discussions:- Adaptive mechanisms

Reduction in the birth rate, State three conditions in a society which coul...

State three conditions in a society which could contribute to a reduction in the birth rate. Birth rate might be decreased by (i) later marriages (as smaller families), (

Specific organization, Specific Organization The body of all living th...

Specific Organization The body of all living things, no matter how different in size or appearance, is composed of cells. Viruses are of course an exception. The study of cell

What is the difference between dna and rna, Concerning their biological fun...

Concerning their biological function what is the difference between DNA and RNA? DNA is the source of information for RNA production (transcription) and therefore for protein s

Learning objectives of coronary artery disease, Q. Learning objectives of c...

Q. Learning objectives of coronary artery disease? • describe the various forms of coronary heart diseases, • enumerate the risk Factors (genetic and environmental) in causati

Explain the difference among dna primase and dna polymerase, Which of the f...

Which of the following is not a difference among DNA primase and DNA polymerase? A. DNA primase can initiate replication of DNA de novo whereas DNA polymerase needs a short oli

Deficiency diseases-metabolic disorders, Metabolic Disorders The disea...

Metabolic Disorders The disease conditions, which are attributable to an imbalance between rates of input of dietary nutrients and the output of production, are defined as pro

Thorax and lungs, Thorax and Lungs: The  lungs, a pair of conical-shap...

Thorax and Lungs: The  lungs, a pair of conical-shaped organs lie  in  the  thoracic cavity, protected by the bony  thorax composed of the  sternum and ribs a interiorly and r

Macro µ nutrients, Tabulate macro & micro nutrients on the basis of -...

Tabulate macro & micro nutrients on the basis of -elements, source, synthesis site, symptoms

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