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

Cold hardiness and cold acclimation, Cold Hardiness and Cold Acclimation ...

Cold Hardiness and Cold Acclimation In connection with cold response we would like to introduce two terms- cold hardiness and cold acclimation. Cold-hardiness ref

Exercise- heat production, Exercise- Heat Production During physical ...

Exercise- Heat Production During physical activity heat production by exercise can to some extent substitute for heat generated by shivering. However, exercise also tends to

The boxes represent domains of non-polar amino acids, The straight line rep...

The straight line represents the domains of polar/charged amino acids and the boxes represent domains of non-polar amino acids. One specific domain is labeled X.In a vinegar and wa

Define the factors causing underweight - etiology, Define the Factors Causi...

Define the Factors Causing Underweight - Etiology? There are a number of factors causing underweight. These are: Poor selection of food Physical activity Mothe

Explain neurosurgery, Neurosurgery An antistaphylococcal antibiotic can...

Neurosurgery An antistaphylococcal antibiotic can decrease the incidence of infection after craniotomy. In spinal surgery, the infection rate after conventional lumbar discecto

Writing transport and flow expressions in simbiology, How do I write the ex...

How do I write the expression for reaction rate (transport) of species between the arterial compartment and the other tissue compartments in symbiology?

Excretory system - ureters, URETERS From hilum of each kidney emerge...

URETERS From hilum of each kidney emerges out a tube. Wall is thick. Lumen is star shaped. 28 cm. long. Transitional epithelium present in wall. Open in to urinary bla

What is the karyotype found in down syndrome, What is the karyotype found i...

What is the karyotype found in Down syndrome? Down syndrome is an aneuploidy, i.e., a numeric changing of chromosomes within the cells compared to the normal number of chromoso

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