David Story Essay

609 Words Aug 7th, 2013 3 Pages
Jessica Thompson
Tuesday July 2, 2013
GE259
Human Anatomy 2
Case Study A. David’s skin is cool to the touch, pale, and blotchy. Which blood vessels regulate blood flow to the capillaries of the skin? What changes in the peripheral vasculature of the skin might cause the changes in its appearance? * The proximal end of a metarteriole is surrounded by scattered smooth muscle fibers whose contraction and relaxation help regulate blood flow. The changes that take place in the peripheral vasculature of the skin are blood flow decreasing, an increase in vascular resistance increases blood pressure; a decrease in vascular resistance has the opposite effect. B. David’s blood pressure is low. Which blood vessels regulate blood
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G. If Sandy had not taken Grandpa David to the hospital, how might his inactivity have caused his condition to worse? * I believe if Sandy didn’t take Grandpa David to the hospital his condition would have become worse because he would stop breathing in his sleep and go into septic shock and it would be too late to save him. H. Which structure in David’s cardiovascular system would respond to low blood oxygen and decreased blood pH? What would the response be? * The structure in David’s cardiovascular system that would respond to low blood oxygen and decreased blood pH would be baroreceptor reflexes. The response would be the cardiovascular deceases parasympathetic stimulation of the heart via the vagus nerves and increases the sympathetic stimulation of the heart via cardiac accelerator nerves. I. Because David’s blood volume had dropped, blood flow to his kidneys had been reduced. What would be the hormonal response of the kidneys to these two changes? * The hormonal response would be together, renin and angiotensin converting enzyme produce the active hormone angiotensin2 which raises blood pressure in two ways. Angiotensin 2 causes vasoconstriction; it raises blood pressure by increasing systemic vascular resistance. Second, it increases secretion of aldosterone, which increases reabsorption of sodium ions and water by the kidneys. J. Why would a blood clot in

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