7.Approximately 30-60 minutes after being bitten by a"bug",a 16 year-old ma n noticed a localized swelling and erythema in the affected area.These changes are caused by which of the following physiologic responses? A.Altered plasma oncotic pressure B.Increased arterial hydrostatic pressure C.Increased vascular permeability D.Lymphatic obstruction E.Venous obstruction Ans:C The inflammatory response induces vasodilation causing extravasation of fluids (swelling)and erythema due to the increased local blood flow.Altered plasma oncouic ressure ased drostatic rily ma anc ob mnune response to 8.A 61-year-old man has had lower leg swelling and pitting edema to the knees with prominen jugular venous distension to the level of the mand ible.He also complains of dyspnea(shortness of breath)after walking from his bedroom to his kitchen.Based on the appearance of the liver seen here.which of the following underlying conditions is likely to be present? A.Chronic renal failure B.Common bile duct obstruction 7. Approximately 30-60 minutes after being bitten by a "bug", a 16 year-old man noticed a localized swelling and erythema in the affected area. These changes are caused by which of the following physiologic responses? A. Altered plasma oncotic pressure B. Increased arterial hydrostatic pressure C. Increased vascular permeability D. Lymphatic obstruction E. Venous obstruction Ans: C The inflammatory response induces vasodilation causing extravasation of fluids (swelling) and erythema due to the increased local blood flow. Altered plasma oncotic pressure, increased arterial hydrostatic pressure, lymphatic obstruction and venous obstruction would all cause edema, but not necessarily marked erythema. Moreover, these situations are not directly correlated to the immune response to injury. 8. A 61-year-old man has had lower leg swelling and pitting edema to the knees with prominent jugular venous distension to the level of the mandible. He also complains of dyspnea (shortness of breath) after walking from his bedroom to his kitchen. Based on the appearance of the liver seen here, which of the following underlying conditions is likely to be present? A. Chronic renal failure B. Common bile duct obstruction