Ayoung patient has developed a disease that is causing her elastic fibers to breakdown. the tunica media of which artery is most affected by this disease? a young patient has developed a disease that is causing her elastic fibers to breakdown. the tunica media of which artery is most affected by this disease? renal arteriole aorta brachial

Typically affects those under the age of 50 and die of Heart failure induced by aortic valvular incompetence. Vasa vasorum show hyperplastic that thickness of their walls that block the  blood flow and causes ischemia of the outer two-thirds of the aortic wall. Starved for O2/ nutrients, elastic fibers become patchy and smooth muscle cells necrose. Media scars. If the disease progresses, syphilitic aortitis leads to an aortic aneurysm. 

stimulus is a change in the environment that causes an organism to react. the response is the reaction to the stimulus. some examples of stimuli for zebras are drought, to many predators, and bad feeding grounds such as dead grass or plants. zebras respond to stimuli just like all other living organisms