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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.
What is Translocation? Sometimes pieces of two chromosomes that are not homologous break off at the same time. If the broken pieces are re-attached to the opposite (in this cas
Occurrence of Jaundice Excessive production of bilirubin - this occurs in some diseases due to destruction of large number of red blood cells in the liver. Obstruction to
Economic Status Economic Status : It is one of the important practical considerations to be kept in mind while formulating a diet prescription. During an acute illness, a
INTERMEDI A T E FILAMENTS These are non-living structures. Made up of different types of protein eg. Keratin, synemin, desmin and vimentin. These are divided into four
While studying evolution, a student comes across a cladogram that includes clades like amphibia, reptilia, aves, and mammalia. What must be the basal clade?
Techniques: operation is done under general endo tracheal anaesthesia. Patient is positioned with the left chest tilted up using a sand bag under left chest. Left antero latera
What are the warning signs of implant failure The warning signs of implant failure are: i). Connecting screw loosening. ii). Connecting screw failure. iii). Gingival b
Explain Hazard Hazard : A biological, chemical or physical agent that is reasonably likely to cause illness or injury in the absence of its control.
Monocotyledonous Embryo The early development of the proembryo in monocots follows the same pattern as in the dicots. However, at the time of differentiation in the globular
Which one of the following statements about all the four of Spongilla, Leech, Dolphin and Penguin is correct? 1. Penguin is homiothermic while the remaining three are poikilothe
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