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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.
REASON S FOR GROWTH OF POPULATION - The human population explosion is mainly a result of reduced death rate. Main reasons for it are - 1 . Protection from natura
Q. Can mitosis occur in haploid (n) cells and in triploid cells? The mitotic cell division can occur in haploid (n) cells, diploid (2n) cells, triploid (3n) cells, and so on. M
Why would we evolve so that when we are stressed our immune system is suppressed? How would this increase survival?
Ethidium Bromide intercalates within structure of the nucleic acids in such a manner that they fluoresce under the UV light. Ethidium bromide staining is generally used to visuali
Natural Gums These are derived from various plant as well as microbial sources and are divided into the following four basic categories: 1. Seaweed gums: Agar, Alginate,
Sex-Limited Traits Sex Limited Traits are traits expressed only in one sex, although the genes controlling thcm arc prcscnt as wcll as transmitted to both thc sexes. Therefore,
Nerve to Mylohyoid Motor branch of inferior dental nerve which descends in a groove on the medial surface of the mandibular ramus. Surgical intervention in this area may lead
Q. Applications of genetic engineering? Applications of genetic engineering in different fields are: • Agriculture: Crops having larger yields, drought -and disease -resis
Q. What is Atrial Fibrillation ? As the left atrial size increase and atrial wall gets fibrosed, depolarization wave fronts get fragmented and atrial fibrillation sets in. Atri
Biodynamic: This dealing with energetic of organisms. Biodynamic is a method of organic farming which treats farms as unified or individual organisms, emphasizing balancing the ho
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