lecture 8 Flashcards
if a child with nephrotic syndrome loses large amounts of albumin in the urine
plasma oncotic pressure decreases and edema develops
what happens during ventricular diastole
the ventricles are filling with blood
which of the following is most likely to increase stroke volume
A (+) inotropic drug
furosemide, a potent diuretic, is administered in acute ventricular failure to
excrete excess water and relieve the edema
a patient in heart is given a drug that is classified as a beta1-adrenergic agonist.
activates the beta1-adrenergic receptors and causes a (+) inotropic effect
sympathetic nerve stimulation of the myocardium
causes a (+) inotropic effect
which condition can occur as a result of low blood volume
postural hypotension
Atropine is anticholinergic and antimuscarinic and therefore
is used to treat bradydysrhythmias such as heart block and a prolonged
P-R interval
ventricular systole refers to
contraction of the ventricular myocardium
what defines cardiac output
heart rate * stoke volume
what is correct about cardiac output
cardiac output is determined by heart rate and stroke volume
what is the best description of systole and diastole
contraction and relaxation
what part of the brain participates in the baroreceptor reflex
medulla oblongata
what is most responsible for the plasma oncotic pressure
albumin
if digital (finger press) pressure is exerted over the carotid sinus, you would expect
that the medulla oblongata will interpret the signal as high blood pressure and therefore fire the vagus nerve
A drug that blocks the effects of the vagus nerve
increases heart rate
which of the following is most likely consequence of a very rapid heart rate
decreased ventricular filling (with blood)
systemic vascular resistance decreases when the
arterioles dilate
which term is afterload most associated
resistance
Anxious person appears in the ER with a heart rate of 160 beats/min and indicates that he has a history of panic attacks. He is prescribed an atianxiety agent and a drug to slow his heart rate. Identify the drug
Beta1-adrenergic blocker
during atrial systole, the
ventricles are relaxed
what elevates blood pressure
vasopressors
jugular vein distention is most associated with
right-sided heart failure
a stenotic aortic valve
increases afterload, thereby increasing the work of the left ventricle
blood pressure is lowest in the
inferior vena cava
vegal stimulation to the heart causes
heart rate to slow
