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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.
Endocrine System In endocrine system ductless gland or specialized cells release chemicals called hormones into the circulating blood. These hormones influence the functions of
The Alanine cycle Follow the alanine link in the alanine cycle. The process goes as under: 1) Pyruvate formed from glycolysis in the muscle is converted to alanine by t
How phytohormones help the development of parthenocarpic fruits? The Parthenocarpic fruits are those produced with no fecundation. Several plants naturally make parthenocarpic
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Define Measuring Direct Aerobic Fitness (VO 2 max) For direct measurement of VO, max, the subject is asked to perform exercise for 12 to 15 minutes. A stationary bicycle or a
Define Simple, Compound, Derived Lipids? Simple lipids are fatty acid esters of glycerol, called triacyglycerols or triglycerides (for e.g. fats and oils) or higher alcohols (
A patient has a low red blood cell count, and microscopic examination reveals an abnormally high proportion of circulating reticulocytes. Upon subsequent examination, the patient i
Explain the Procedure for Testing Quality of Water Using Presumptive Test? Now carry out the exercise following the steps indicated herewith. 1. Make 3 series of lactose bro
Explain Microscopy - Principles, Use and Maintenance? We start the Practicals in the Food Microbiology and Safety Course with an orientation to the microscope. This first Pract
how trematodes/nematodes adapt to their parasitic mode of feeding
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