BRS Flashcards Cardiovascular Physiology

tiwariashley
Flashcards by tiwariashley, updated more than 1 year ago
tiwariashley
Created by tiwariashley almost 5 years ago
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Physiology at UCF
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Question Answer
blood flows from the lungs to the left atrium via the pulmonary vein
blood flows from left atrium to the left ventricle via the mitral valve
blood flows from the left ventricle to the aorta via the aortic valve
blood flows from the aorta to the systemic arteries and tissues
blood flows from the tissues to the systemic veins and vena cava
blood flows from the vena cava to the right atrium
blood flows from the right atrium to the _______ ventricle through the ______ valve right ventricle through tricuspid valve
blood flows from right ventricle to the pulmonary artery
blood flows from the pulmonary artery to the _________ for oxygenation lungs
arteriography of a patient's left renal artery shows a narrowing of the radius of the artery by 50%. What is the expected change in blood flow through the stenotic artery decrease to 1/16
When a person moves from supine position to a standing position what compensatory changes occurs? increased contractility
At which site is the systolic blood pressure the highest renal artery
A person's ECG has no P wave but has normal QRS complex and a normal T wave. Therefore his pacemaker is located in the AV node
If the ejection fraction increases there will be a decrease in end-systolic volume
An electrocardiogram on a person shows ventricular extrasystole. The extrasystole beat would produce decreased pulse pressure because stroke volume is decreased
An electrocardiogram on a person shows ventricular extrasystole. The next normal ventricular contraction that occurs after the extrasystole would produce increased pulse press because the contractility of the ventricle is increased
An increase in contractility is demonstrated on a Frank-Starling diagram by increased cardiac output for a given end diastolic volume
The tendency for blood flow to be turbulent is increased by partial occlusion of a blood vessel
a patient experience orthostatic hypotension after a sympathectomy. The explanation for this occurrence is a suppressed response of the baroreceptor mechanism
The ventricles are completely depolarized during which isoelectric portion of the electrocardiogram ST segment
When is pulmonary blood flow greater than aortic blood flow left to right ventricular shunt
a person's ECG shows two P waves preceding each QRS complex. The interpret action of this pattern is decreased conduction through the AV node
an acute decrease in arterial blood pressure elicits what compensatory change decreased firing rate of the carotid sinus nerve
The tendency for edema to occur will be increased by increased venous pressure
Inspiration splits the second heart sound the aortic valve closes before the pulmonic valve
During exercise total peripheral resistance TPR decreases because of the effect of local metabolites on skeletal muscle arterioles
an increase in arteriolar resistance without a change in any other component of the cardiovascular system will produce an increase in arterial pressure
The following measurements were obtained in a male patient HR: 70bpm Pulmonary vein O2: .24 O2/ml Pulmonary artery O2: .16 O2/ml Whole body O2 consumption: 500 ml/min What is the patient's cardiac output 6.25L min
An inward Na+ current is the result of an upstroke of the action potential in Purkinje Fibers
The greatest pressure decrease in the circulation occurs across the arterioles because they have the greatest resistance
Pulse pressure is determined by stroke volume
In the SA node phase 4 depolarization/ pacemaker potential is attributable to an increase in Na+ conductance
Which receptor mediates constriction of arteriolar smooth muscle A1 receptors
during which phase of the cardiac cycle is aortic pressure highest reduced ventricular ejection
myocardial contractility is best correlated with the intracellular concentration of Ca2+
What is an example of the effect of histamine vasodilation of the arterioles
Carbon dioxide regulates blood flow to what organ brain
Cardiac output of the right side of the heart is what percentage of the cardiac output of the left side of the heart 100%
The physiologic function of the relatively slow conduction through the AV node is to allow sufficient time for filling of the ventricles
Blow flow to which organ is controlled primarily by the sympathetic nervous system rather than by local metabolites skin
What parameter is decreased during moderate exercise TPR total peripheral resistance
This receptor is blocked when propranolol is administered to reduce cardiac output B1 receptor
during which phase of the cardiac cycle is ventricular volume lowest isovolumetric ventricular relaxation
what causes an increase in myocardial O2 consumption increased size of heart
What substance crosses capillary walls primarily through water-filled clefts between the endothelial cells Carbon monoxide
A 24 yo woman presents to the ER department with severe diarrhea. When she is lying supine (lying down) her blood pressure is 90/60 mm Hg ( decreased) and her heart rate further increases to 120bpm. What accounts for further increase in heart rate upon standing decreased venous return
A 60 yo businessman is evaluated by his physician who determines that is bp is significantly elevated at 185/130 mm Hg. Lab tests reveal an increase in plasma renin activity , plasma aldosterone level, and left renal vein renin level. His right renal vein level is decreased. What is the cause for his hypertension left renal artery stenosis
Propranolol has what effect on the heart decreases heat rate
Which receptor mediates slowing of the heart muscarinic receptors
A change in _____ has a negative inotropic effect on the heart ACh
The low-resistance pathways between myocardial cells that allow for the pored of action potentials are the gap junctions
which agent is released or secreted after a hemorrhage and causes an increase in renal Na+ reabsorption Aldosterone
During which phase of the cardiac cycle does the mitral valve open isovolumetric ventricular relaxation
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