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The thick layer of the heart wall that contains contractile cardiac muscle tissue is the:
The layer of the heart wall synonymous with the visceral layer of the serous pericardium is:
When the ventricles contract, the bicuspid (mitral) valve prevents blood from flowing from the:
left ventricle to the left atrium
A person with a heart rate of 75 beats per minute and a stroke volume of 60 mL per beat has a cardiac output of:
The volume of blood pumped out by each ventricle with each beat of the heart is called the:
The path of blood flow within the systemic vascular system is:
arteries, arterioles, capillary beds, venules, veins
An increase in parasympathetic activity (primarily by the vagus nerves) causes:
a decrease in both heart rate and cardiac output
Blood travels to the stomach by way of the branch of the celiac trunk called the:
left gastric atery
The brachial vein:
drains blood from the radial and ulnar veins, then empties that blood into the axillary vein
Generalized vasoconstriction occurs as a result of:
an increase in sympathetic nervous system firing
Substances tend to leave the bloodstream at the arterial end of the capillary because:
blood pressure is higher at the arterial end of the capillary
T/F The tricuspid valve is located on the right side of the heart between the right atrium and right ventricle.
T/F The semilunar valves prevent the backflow of blood into the atria when the ventricles are contracting.
T/F The coronary sinus on the backside of the heart drains deoxygenated blood from the wall of the heart into the left atrium.
T/F The part of the intrinsic conduction system of the heart that directly supplies the walls of the ventricles is the Purkinje fibers.
T/F Cardiac output is calculated by multiplying the stroke volume times the systolic blood pressure.
T/F An increased firing of the parasympathetic nervous system causes increased cardiac output.
T/F Smooth muscle and elastic tissue in a blood vessel wall is found primarily in the tunica media.
T/F When precapillary sphincters are closed, blood flows through the shunts and bypasses the tissue cells.
T/F The three branches of the aortic arch are the brachiocephalic trunk, left common carotid artery, and the left subclavian artery.
T/F The great saphenous vein, the longest vein in the body, drains deoxygenated blood from the dorsal venous arch in the foot which then empties into the femoral vein.
T/F The major vessels involved in hepatic portal circulation are the inferior and superior mesenteric arteries, the splenic artery, and the left gastric artery.
T/F In fetal circulation, blood travels directly from the right atrium to the left atrium through the foramen ovale.
T/F Diastolic blood pressure is the pressure in the arteries at the peak of ventricular contraction.
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