Question :
71.Select the incorrect statement about rheumatic fever.
a.It causes a heart : 1417118
71.Select the incorrect statement about rheumatic fever.
a.It causes a heart murmur.
b.It is an autoimmune disease.
c.It is triggered by a streptococcus bacterium.
d.The heart conduction system is disrupted.
e.The heart valves become inflamed and scarred.
72.Increased ____ permeability of nodal cells hyperpolarizes the SA node.
a.chloride
b.iodide
c.potassium
d.sodium
e.zinc
73.The parasympathetic nervous system has little effect on ____ activity.
a.atrial
b.AV node
c.heart rate
d.SA node
e.ventricular
74.If the EDV were held constant, increased cardiac output could be accomplished by
a.decreased sympathetic stimulation of the heart
b.decreased parasympathetic stimulation of the heart
c.decreased contractility
d.increased length of isovolumetric contraction
e.increased arterial blood pressure
75.Which of the following is not associated with an increase in stroke volume?
a.increased end-diastolic volume
b.increased contractility of the heart
c.increased end-systolic volume
d.increased preload
e.increased venous return
76.Vasodilation of coronary arteries is induced by
a.adenosine
b.nitroglycerin
c.nitric oxide
d.all of the above
e.only a and b
77.The cardiac muscle
a.extracts oxygen and nutrients from the blood within its chambers
b.receives its blood supply primarily during ventricular systole when blood is forced into coronary arteries
c.receives its blood supply directly from the pulmonary circulation as all of this blood passes through the coronary circulation
d.receives most of its blood supply during ventricular diastole by means of coronary arteries
e.does not receive blood in any of the ways mentioned above
78.A metabolic predictor of heart disease that is independent of one's cholesterol/lipid profile is
a.HDL
b.VLDL
c.homocysteine
d.methionine
e.creatine
79.A swishy murmur heard between the second and first heart sounds is indicative of a(n) ____________ valve.
a.insufficient semilunar
b.insufficient AV
c.stenotic semilunar
d.stenotic AV
e.Either a or d correctly completes the sentence.
