A28‐year‐old male business executive presents to a primary care provider with concerns about hair loss. he is otherwise healthy without chronic medical conditions or current medications. he has a chart history of allergy to sulfa medications, although this happened when he was a young child, and he does not recall the incident or the reaction. he is unsure at what age his father went bald, as he never remembers his father having hair. he remarks jokingly that he is losing more hair than his dogs at home, who shed frequently but are otherwise healthy. on examination, he has a single uniform oval patch of hair loss over the left temporal area without any scaling, inflammation, or other skin changes where the hair is missing. which of the following is the most likely explanation for his hair loss?
a) tinea capitis, as evidenced by his exposure to animals that may carry this pathogen
b) male pattern baldness, as evidenced by his father's baldness at a young age
c) drug rash, as evidenced by his allergy to sulfa drugs
d) alopecia areata, as evidenced by patchy hair loss without associated skin changes
e) trichotillomania, as evidenced by his anxiety and need to diffuse uncomfortable
situations with inappropriate humor

According to harry harlow’s experiment what behavior did the baby monkeys exhibit when the cloth mother was present? a. they cowered in the corner of the room. b. they were willing to explore the room. c. they sought refuge with the wire mother. d. he behaved aggressively toward the cloth mother.

The amount of oxygen that is actually used by the body during the rest or a hand workout is determined by the heart rate, the stroke volume, and the amount of a. blood circulating in the vascular system b. oxygen removed from the vascular system c. oxygen provided to the vascular system d. blood that individual has in the body e. hemoglobin in the red blood cells

A35-year-old woman comes to the ed complaining of chest pressure. she has had such episodes intermittently over the last 5 years, usually when sleeping, but over the last year she has had more frequent severe symptoms that are occasionally associated with severe migraine headaches. the pain is midsternal and is described as pressure that extends as a band around her chest. the ed physician is initially dubious that the pain is cardiac in origin, because the woman has no coronary disease risk factors. an ecg, however, shows 2mm st-segment elevation and inverted t waves in leads v1 through v5 and 1mm st-segment depression in leads ii, iii, and avf. before the cardiologist arrives in the ed, the patient's ecg has returned to normal. this repeat normal ecg is obtained after the administration of aspirin, nitroglycerin, morphine, and oxygen. which of the following is most likely for these findings? - diffuse intimal thickening with focal areas of atherosclerotic narrowing - intermittent thrombus formation and lysis in the left anterior descending artery - intermittent thrombus formation and lysis in the right coronary artery - plaque rupture and thrombus formation in the left anterior descending artery - transiently increased coronary vascular tone in the right coronary artery