what is the function of the heart valves?

what part of the heart's intrinsic system carries impulses into the interventricular septum?

what term refers to the contraction of the heart?

which of these will decrease heart rate?

the partition where the bundle branches are located is called the

the pointed, inferior portion of the heart, known as the ___, rests on the diaphragm and is oriented toward the left hip

the two superior receiving chambers of the heart are known as the ___, while the two inferior discharging chambers of the heart are known as the ___

the valves located between the atria and ventricles are known as the ___ valves.

blood leaves the left ventricle through an artery known as the

the transportation of blood from the right side of the heart to the lungs and back to the left side of the heart is known as ___ circulation

the tiny white cords that anchor the cusps or flaps of the endocardium to the walls of the ventricles are called the

in the walls of the ___ are substantially thicker because that chamber acts as the more powerful systemic pump of the heart

the bicuspid valve is also referred to as the ___ valve

when ventricles ___, the AV valves are closed

the sinoatrial node, located in the right atrium of the heart, is often called the

the first heart sound "lub", is caused by the closure of the ___ valves

the term that means heart contraction is

during mid-to-late diastole, blood flows from the atria to the

the average heart beats about ___ times per minute

the heart is situated within the medial section to the thoracic cavity known as the

pulmonary circulation involves blood flow to and from the heart and the

the left atrium receives blood from the

pulmonary arteries transport

what structure divides the left atrium from the right atrium?

when the ventricles contract, the bicuspid (mitral) valve prevents blood from flowing from the

the tricuspid valve is located between the

what anchors the flaps of the atrioventricular valves to the walls of the ventricles?

which one of the following blood vessels carries oxygenated blood?

which vessel carries deoxygenated blood from cardiac circulation to the right atrium of the heart?

the heart sounds "lub" and "dup" result from

what chamber of the heart will blood enter after passing through the bicuspid valve?

blood is returned to the right side of the heart from the lungs

the alternative name for the bicuspid valve is the mitral valve

the chordae tendineae anchor the semilunar valves to the walls of the ventricles

the semilunar valves prevent the backflow of blood into the atria when the ventricles are contracting

the sinatrial (SA) node is the pacemaker of the intrinsic conduction system of the heart

during ventricular systole, blood is ejected from the ventricles through the large arteries connected to the heart

the heart sounds "lub" and "dup," occur when the atria contract and subsequently when the ventricles contract

the part of the intrinsic conduction system of the heart that directly supplies the walls of the ventricles is the Purkinje fibers

the QRS wave on an electrocardiogram is representative of ventricular repolarization

the average heart beats approximately 75 times each minute at rest

during ventricle diastole, the bicuspid and tricuspid (mitral) valves are closed

cardiac output is the product of the stroke volume and the systolic blood pressure

the anatomy of intrinsic conduction system causes contraction of the ventricles to begin at the apex and move superiorly. why is this important?

a person notices his or her heart beat because he or she senses blood being pumped by the heart. Excessive caffeine intake can lead to irregular heart rhythms that patients perceive as skipped beats. Given that caffeine is a stimulant, which of the following mechanisms best explains the reason for feeling that the heart skipped a beat?

which part of the intrinsic conduction system normally initiates the depolarizing impulse that cause a heartbeat

which of these structures conduct(s) action potentials the slowest?

calculate the cardiac output if the heart rate (HR) is 90bpm, stroke volume (SV) is 110ml/beat, end diastic volume (EDV) is 140ml, and the end systolic volume (ESV) is 30ml

an increase in sympathetic stimulation of the heart would increase stroke volume by increasing

delay(s) occurs here while atria contract

set(s) the pace for the entire heart

convey(s) the impulse down the interventricular septum

link(s) between the SA node and AV node

coronary artery disease results from ___.

blood cells and proteins typically cannot pass across the walls of capillaries and are thus prevented from leaving or entering the capillaries

hypotension is diastolic blood pressure below 100 mm Hg

blood pressure is highest in the arteries and declines to zero or negative pressure in the vena cavae

diastolic pressure is the blood pressure in the arteries at the peak of ventricular contraction

the hepatic veins drain the blood from the liver and return it to the inferior vena cava

the inferior vena cava returns blood to the heart from all body regions above the diaphragm

the renal veins carry oxygen-rich blood to the kidneys

the three branches of the aortic arch are the brachiocephalic trunk, left common cartoid artery, and the left subclavian artery

the portion of the aorta in the abdominopelvic cavity is known as the thoracic aorta

exchanges between blood and tissue cells occur in capillary beds

arteries branch into smaller vessels known as arterioles

where is the radial artery located?

the friction blood encounters as it flows through the vessels is called

which of the following vessels has the lowest blood pressure

the brachial vein

what organ receives blood from the hepatic portal vein?

which vein returns blood to the superior vena cava?

veins

sustained elevated arterial blood pressure above 140/90 mm Hg is a condition known as

the narrowing of blood vessels is known as

the single vessel that drains blood from the digestive tract organs to the liver is the

veins draining the head and arms empty into the ___, which carries blood to the right atrium of the heart

the longest veins in the body drain the leg and are the

the largest artery in the body is the

large veins have ___ to prevent the backflow of blood

the flow of blood through a capillary bed is called

arteries are normally depicted as red while veins are colored blue. The exceptions to this rule are the ___ arteries and veins

large blood vessels that carry blood away from the heart are called

which of the following is a risk factor for developing essential hypertension

what is a possible complication to arteriosclerosis

which of these will increase arterial blood pressure (BP)?

what blood vessel do you palpate when checking the pulse in your neck?

which arteries carry oxygen rich blood into the cranial cavity?

the beginning of the QRS complex of the electrocardiogram (ECG) immediately precedes which of the following events?

which of the following can be heard with a stethoscope most easily

fluid tends to be forced out of a capillary bed by ___ while ___ tends to draw fluid into the capillary bed