Regulation and exchange
Receptors that sense a change in blood pressure
What is a baroreceptor
Increase in radius will do what to the blood flow
What is increase
The innermost layer
What is the tunica intima or interna
Valve located between the left atrium and ventricle.
What is the left AV valve, bicuspid, or mitral valve
The volume of blood pumped out by each ventricle with each beat of the heart is called the:
What is stroke volume
The response in terms of vessel size when blood pressure rises.
What is vasodilation
Another name for high blood pressure
What is hypertension.
Composed entirely of endothelial cells
What are the capillaries
Delays the impulse while the ventricle fills.
What is the AV node
What does the lub-dub sound come from in the heart?
the first sound is longer and louder and is caused by closure of the AV valves; the second sound is shorter and sharper and is caused by closure of the semilunar valves
An example of a hormone released to increase cardiac output, blood volume, and pressure.
What is epinephrine, norepinephrine
Type of nervous system innervation that increases cardiac output and blood flow
What is sympathetic
Blood vessel with thicker tunica media.
What is an artery
Another name for contraction and emptying of chambers.
What is systole
A heart rate of over 100 beats per minute is called...?
What is tachycardia
What would be a result of having decreased venous return to the heart
decrease in stroke volume and cardiac output
Friction blood encounters as it flows through the vessels
What is peripheral resistance or systemic resistance
What are the three blood vessels that directly branch from the ascending aorta?
What are the left subclavian, left common carotid, and right brachiocephalic
Part of ECG where ventricles repolarize
What is the T-wave
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:
4500 mL/min
Capillaries tend to get rid of substances at the arterial end due to what? They also want to take in substance at the venous end because of what?
What is high pressure inside the capillaries and then low pressure inside
If someones pressure is 140/80, which number represents ventricular systole
What is 140 mm HG
Blood leaves the heart through the aorta and this blood vessel when traveling to the right side of the body.
What is the brachiocephalic artery
The outermost layer of the heart
What is the epicardium or visceral pericardium
What is the correct sequence of events for the transmission of an impulse in the conduction system for a heart beat?
sinoatrial (SA) node, atrioventricular (AV) node, atrioventricular (AV) bundle, bundle branches, Purkinje fibers