cardiovascular- anatomy

¡Supera tus tareas y exámenes ahora con Quizwiz!

the length of the cardiac cycle is normally _____ seconds in length

0.8

a person with a heart rate if 75 beats per minute and a stroke volume of 60mL per beat has a cardiac outout of

4500 mL/minute

the average heart beats about _______ times per minute

75

the electrocardiogram (ECG) wave that results from the firing of the sinoatrial (SA) node is the ______ wave

P wave

which one of the following represents the correct path for the transmission of an impulse in the intrinsic conduction system of the heart.

SA node, AV node, AV bundle, right and left bundle branches, purkinje fibers

blood leaves the left ventricle through an artery known as the

aorta

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

aorta

the largest watery in the body is the

aorta

which valve guards the base of the aorta and opens when the ventricles are contracting?

aortic semilunar valve

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

apex

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 _______

arita; ventricles

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

arteries

the path of blood flow within the systemic vascular system is

arterioles, arteries, venues, veins, capillary beds

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

atrioventricular (AV)

the valves located between the atria and ventricles are known as the _____ valves

atrioventricular (AV)

pulmonary arteries transport

blood rich in carbon dioxide to the lungs

which type of vessel is constructed only from tunica intima

capillaries

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

chordae tendineae

what anchors the flap of the atrioventricular valves to the walls of the ventricles

chordae tendineae

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

closure of the heart valves

when ventricles ______, the AV valves are closed

contract

oxygenated blood nourishing the myocardium comes from vessels that branch off the aorta called

coronary arteries

the coronary veins empty blood from the myocardium into a large vein on the posterior side of the heart known as the

coronary sinus

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

coronary sinus

the layer of the heart wall synonymous with the visceral layer of the serous pericardium is

epicardium

the visceral layer of the serous pericardium is actually the same layer as the

epicardium

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

false

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

false

during ventricular diastole, the bicuspid and tricuspid valves are closed

false

the QRS wave on an electrocardiogram is representative of ventricular repolarization

false

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

false

the heart sounds lub and dup occur when the arita contract and subsequently when the ventricles contract

false

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

false

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

great saphenous veins

which of these events is not associated with ventricular systole

heart is relaxed

the vagus nerve operates under the control of the parasympathetic nervous system and causes the

heart rate to decrease

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

hepatic portal vein

the partition where the bundle branches are located is called the

inter ventricular septum

what structure divides the left atrium from the right atrium

interatrial septum

the organs served by the renal arteries and veins are the

kidneys

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

left ventricle

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

left ventricle to the left atrium

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

lungs

tunica _______, the middle layer of a typical blood vessel, contains smooth muscle and elastic fibers

media

the heart is situated within the medial section of the thoracic cavity known as the ____

mediastinum

the flow of blood through a capillary bed is called

microcirculation

the bicuspid valve is also referred to as the ______ valve

mitral

the layer of the heart wall that receives the stimulus from Letter E is called

myocardium

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

pacemaker

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

pulmonary

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

pulmonary

which one of the following blood vessels carries oxygenated blood

pulmonary artery

the left atrium receives blood from the

pulmonary veins

the alternating expansion and recoil of an artery that occurs with each beat of the left ventricle creates a pressure wave known as a

pulse

the tricuspid valve is located between the

right atrium and right ventricle

the volume of blood pumped out by each ventricle with each beat of the heart is called the

stroke volume

the volume of blood pumped out of a ventricle with each heartbeat is known as ______

stroke volume (SV)

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

superior vena cava

the term that means heart contractions is ______

systole

veins _______

transport oxygen rich bloof

arteries branch into samaller vessels known as arterioles

true

capillaries are composed only of tunica intima

true

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

true

exchange between blood and tissue cells occur in capillary beds

true

reductions in venous return cause reductions in both stroke volume and cardiac output

true

the alternate name for the bicuspid valve is the mitral valve

true

the average heart beats approximately 75 times each minute at rest

true

the fibrous pericardium is superficial to the serous pericardium surrounding the heart

true

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

true

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

true

when pre capillary sphincters are closed, blood flows through the shunts and bypasses the tissue cells

true

the correct sequence of layers of a typical blood vessel, from superficial to deep, are

tunica externa, tunica media, tunica intima

large veins have _____ to prevent the back flow of blood

valves

the narrowing of blood vessels is known as

vasoconstriction

capillary beds are drained by vessels known as

venules

the mitral valve is normally closed

when the ventricle is in systole


Conjuntos de estudio relacionados

Chapter 10: Baroque: Piety and Extravagance

View Set

Ethics of biotechnologyUnderstand what the IRB is and why it was established. Be able to give examples of research that needs IRB approval vs that which does not.

View Set

O- [ou] - Mots avec le son [ou], au milieu du mot

View Set

Simple, Compound, Complex, and Compound-Complex Sentences

View Set