Coronary vascular resistance reflexly, Biology

Assignment Help:

Baroreceptor activity affects coronary vascular resistance reflexly. With carotid occlusion, baroreceptor hypotension leads to reflex adrenergic stimulation, increased metabolic activity and secondary vasodilation. When this is prevented by beta blockade, reflex coronary vasoconstriction secondary to carotid hypotension is unmasked. Alpha1 adrenoreceptor stimulation is capable of causing epicardial vasoconstriction in ischaemic myocardium, thereby influencing favourably the transmural distribution of blood flow to the subendocardium during exercise. Activation of chemoreceptors initially causes coronary dilation, a reflex that is mediated by vagi and can be abolished by atropine e.g. Bezold Jarisch reflex.


Related Discussions:- Coronary vascular resistance reflexly

What is the defense mechanism to stop an infection, What is the defense mec...

What is the defense mechanism that begins to work when inflammation fails to stop an infection? If the inflammatory attack is not enough to halt the infectious process the body

Explain the nutrient composition of different milk, Explain the Nutrient co...

Explain the Nutrient composition of different milk? Sometimes exclusive breast-feeding cannot be sustained. Working mothers join their duty in the fourth month and exclusively

What are biopolymers, Q. What are biopolymers? Polymers are macromolecu...

Q. What are biopolymers? Polymers are macromolecules made by the union of several smaller identical molecules, called monomers. Biopolymers are polymers present in the living b

Why the l enantionmer is more dominant, In the Miller-Urey experiment, amin...

In the Miller-Urey experiment, amino acids of bothe the L and D enantionmers. Why is it that the L enantionmer is more dominant in living things?

What are four initial stages of the embryonic development, Q. What are the ...

Q. What are the four initial stages of the embryonic development? The four early stages of the embryonic development are the blastula stage, the morula stage, the gastrula stag

How campylobacteriosis is caused, How Campylobacteriosis is caused It i...

How Campylobacteriosis is caused It is caused by  Campylobacter jejuni, a Gram-negative rod. It is a microaerophillic organism, which means it has a requirement for reduced lev

What is sporocyst. specify., What is Sporocyst? Specify. A stage in the...

What is Sporocyst? Specify. A stage in the life cycle of trematode flukes. Sporocyst develops from the mericidium found in intermediate host. Every sporocyst contains the germ

Phylum Arthropoda, What is an example of animal coming from the phylum art...

What is an example of animal coming from the phylum arthropoda?

Birth of genetics, Birth of Genetics Modern genetics originated with Gr...

Birth of Genetics Modern genetics originated with Gregor Mendel's work. It is based on this paper entitled "Experiments in Plant Hybridisation " published in 1866 inqthe Procee

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