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As heart failure sets in, there is activation of RAS (Fig 2.1). Adrenergic stimulation of beta-1 receptors in juxtaglomerular apparatus of the kidneys results in release of renin. Another mechanism i.e. responsible for renin release is baroreceptor stimulation in renal vascular bed by reduction of renal blood flow.
Angiotensin II that is released is a powerful vasoconstrictor and stimulates the release of aldosterone. It also causes remodeling of cardiac myocytes. Aldosterone retains sodium and has direct effects on myocardium. The result is increased systemic vascular resistance and development of edema. Hence the interruption of this renin-angiotensin-aldosterone axis by angiotensin-converting enzyme inhibitors (ACE-Inhibitors) or angiotensin receptor blockers (ARBs) has salutary effects as there is reduction in systemic vascular resistance, afterload reduction, mild diuresis and improvement in the cardiac output.
Angiotensin II also has direct role in modifying the structure and function of myocardium.
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
It is defined as the presence of chemicals and particulate in the atmosphere in quantities and pollution that are harmful to human health and environment. It occurs when the concen
flowers formation without any leaves?
Another type of soil for bacteria gardens Boil some rice or potatoes in a dish unless well cooked. Drain and save the water. Use the bouillon cube to the gelatin. Use th
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“Define nosocomial infections. Discuss the factors that might influence whether a patient may acquire nosocomial infection. How might these risks be reduced?”
List the four phases of meiosis I, and briefly explain what occurs during each phase Prophase I: DNA coils into chromosomes, the nucleolus and nuclear envelope disappear, the m
The biologicaI species concept claims that species consist of natural populations and that species are real and objective. They are not man-made subjective abstraction. According
Arterial Conduits LIMA UMA: anastomosis side-t-side with diaganal8 end-lo-sode with LAD Figure: Arterial conduits Internal Mamnrary Artery (IMA)
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