Anatomy Chapter 18 Dynamic Study Modules (All)

Pataasin ang iyong marka sa homework at exams ngayon gamit ang Quizwiz!

Identify the part of the cardiac conduction system indicated by "D"

AV bundle (bundle of His)

Identify the part of the cardiac conduction system indicated by "B"

AV node

What term describes an area of the heart conduction system where the impulse is delayed for 0.1 sec?

AV node

Indicate the valve separating the following areas of the heart: left atrium and left ventricle

Bicuspid (mitral) valve

Which of the following factors gives the myocardium its high resistance to fatigue? The presence of intercalated discs The coronary circulation Gap junctions Large number of mitochondria in the cytoplasm

Large number of mitochondria in the cytoplasm

The interventricular septum forms a dividing wall between the ______________

Left and right ventricles

Into which chamber of the heart do the pulmonary veins deliver blood?

Left atrium

The left ventricle receives blood from the ________________

Left atrium

What is the 'destination' of the pulmonary veins?

Left atrium

Freshly oxygenated blood is delivered to the _____________ and then it passes into the ____________ to be pumped to the entire body

Left atrium; left ventricle

Identify the vessel of coronary circulation indicated by "A"

Left coronary artery

Identify the posterior surface heart structure indicated by "B"

Left pulmonary veins

The walls of the __________ are thicker than the walls of any other heart chamber

Left ventricle

Which term describes an area of the heart conduction system with the fastest depolarizing pacemaker cells? AV bundle SA node Bundle branches Subendocardial conducting network AV node

SA node

Match the following term with its correct description: atrial depolarization P wave QT interval T wave QRS complex

P wave

What muscles prevent the atrioventricular valves from everting during ventricular contraction?

Papillary muscles

Identify the pericardial structure indicated by "B"

Parietal layer of serous pericardium

The inner lining of the fibrous pericardium is formed by the ___________

Parietal layer of serous pericardium

Identify the pericardial structure indicated by "C"

Pericardial cavity

Identify the vessel of coronary circulation indicated by "F"

Posterior interventricular artery

Match the following term with its correct description: aortic semilunar valve Valve between the left atrium and left ventricle Valve between the right atrium and right ventricle Prevents backflow of blood into the left ventricle Prevents backflow of blood into the right ventricle

Prevents backflow of blood into the left ventricle

Match the following term with its correct description: pulmonary semilunar valve Prevents backflow of blood into the left ventricle Prevents backflow of blood into the right ventricle Valve between the left atrium and left ventricle Valve between the right atrium and right ventricle

Prevents backflow of blood into the right ventricle

Indicate the valve separating the following areas of the heart: right ventricle and pulmonary trunk

Pulmonary semilunar valve

Match the area of the heart with the "exit" through which the blood leaves: right ventricle

Pulmonary semilunar valve

The right ventricle sends blood into the _____________

Pulmonary trunk

The left atrium receives blood from what structure?

Pulmonary veins

Match the given term with its correct description: ventricular depolarization T wave AV node QRS complex P wave SA node

QRS complex

The inferior vena cava brings blood from the lower regions of the body and empties into the ________________

Right atrium

The right ventricle receives blood from what structure?

Right atrium

Identify the correct sequence of blood flow through the chambers of the heart

Right atrium, right ventricle, lungs, left atrium, left ventricle

Identify the vessel of coronary circulation indicated by "C"

Right coronary artery

Identify the posterior surface heart structure indicated by "A"

Right pulmonary artery

During pulmonary circulation, blood leaves the ______________

Right ventricle and moves to the lungs

Match the following term to its correct description: posterior interventricular artery Supplies blood to the lateral right side of the myocardium Supplies blood to the left atrium and posterior walls of the left ventricle Supplies blood to the interventricular septum and anterior walls of both ventricles Runs to the apex of the heart

Runs to the apex of the heart

Identify the part of the cardiac conduction system indicated by "A"

SA node

The normal pacemaker of the heart is the ______________

SA node

What is the correct sequence of current flow through the intrinsic conduction system of the heart?

SA node, AV node, AV bundle, right and left bundle branches, subendocardial conducting network

What structure lies on the outside surface of the heart and is an integral part of the heart wall?

The epicardium

Which of the following statements is not true about the shape, position, and location of the heart? Approximately 2/3 of the heart is found to the left of the midline The heart is enclosed in a double-layered sac called the pleural membrane The heart is located between the two lungs within the mediastinum The heart is shaped like a cone with the base facing the right shoulder

The heart is enclosed in a double-layered sac called the pleural membrane

What part of the heart is considered the systemic circuit pump?

The left ventricle

Match the following structure with its description: serous pericardium Glistening white sheet of endothelium lining the inside of the heart Thin, slippery, two-layered membrane Middle layer of the heart, composed mainly of cardiac muscle Inner layer of pericardium (called the visceral layer) Loosely fitting superficial part of the sac enclosing the heart

Thin, slippery, two-layered membrane

Identify the part of the ECG indicated by "B"

Ventricular depolarization

Identify the part of the ECG indicated by "C"

Ventricular repolarization

Identify the pericardial structure indicated by "E"

Myocardium

The trabecular carneae are located in the ______________

Ventricles

Identify the vessel of coronary circulation indicated by "D"

Anastomosis

What is the purpose of the chord tendineae?

Anchor the AV valves in the closed position

Identify the vessel of coronary circulation indicated by "E"

Anterior interventricular artery

The coronary arteries receive blood from the ____________

Aorta

Indicate the valve separating the following areas of the heart: left ventricle and aorta

Aortic semilunar valve

Match the area of the heart with the "exit" through which the blood leaves: left ventricle

Aortic semilunar valve

The superior chambers of the heart are called the ______________

Atria

Identify the part of the ECG indicated by "A"

Atrial depolarization

The P wave of an electrocardiogram represents _____________

Atrial depolarization

The ability of some cardiac muscle cells to initiate their own depolarization and cause depolarization of the rest of the heart is called ______________

Automaticity

What makes the heart valves open and close?

Blood pressure

Identify the parts of the cardiac conduction system indicated by "E"

Bundle branches

The _____________ are attached to the AV valve flaps

Chordae tendineae

Identify the vessel of coronary circulation indicated by "B"

Circumflex artery

The second heart sound (the 'dup' of 'lib-dup') is caused by the ___________

Closure of the semilunar valves

Match the following term to its description: systole Contraction The volume of blood pumped by one ventricle with each heartbeat The amount of blood pumped by each ventricle in one minute Relaxation The events associated with blood flow through the heart during one complete heartbeat

Contraction

The vessels that carry oxygen to the myocardium are called ______________

Coronary arteries

Identify the posterior surface heart structure indicated by "D"

Coronary sinus

Identify the pericardial structure indicated by "F"

Endocardium

The lining of the heart chambers is called the __________

Endocardium

Identify the pericardial structure indicated by "D"

Epicardium

What is the correct sequence of layers in the heart wall, starting with the outer layer?

Epicardium, myocardium, endocardium

Identify the pericardial structure indicated by "A"

Fibrous pericardium

The cells of the myocardium behave as a single, coordinated unit called a _________________

Functional syncytium

Match the following structure with its description: endocardium Thin, slippery, two-layer membrane Glistening white sheet of endothelium lining the inside of the heart Loosely fitting superficial part of the sac enclosing the heart Inner layer of pericardium Middle layer of the heart, composed mainly of cardiac muscle

Glistening white sheet of endothelium lining the inside of the heart

Identify the posterior surface heart structure indicated by "C"

Great cardiac vein

Match the following structure with its description: epicardium Thin, slippery, two-layer membrane Inner layer of pericardium (called the visceral layer) Loosely fitting superficial part of the sac enclosing the heart Middle layer of the heart, composed mainly of cardiac muscle Glistening white sheet of endothelium lining the outside of the heart

Inner layer of pericardium (called the visceral layer)

Which of the following is not a role of the pericardium? It prevents the heart from overfilling with blood It anchors the heart to surrounding structures It facilitates heart contraction It protects the heart

It facilitates heart contraction

During systemic circulation, blood leaves the ____________

Left ventricle and goes directly to the aorta

When the mitral valve closes, it prevents the backflow of blood from the ______________

Left ventricle into the left atrium

Match the following structure with its description: fibrous pericardium Thin, slippery, two-layer membrane Loosely fitting superficial part of the sac enclosing the heart Middle layer of the heart, composed mainly of cardiac muscle Inner layer of pericardium (called the visceral layer) Glistening white sheet of endothelium lining the inside of the heart

Loosely fitting superficial part of the sac enclosing the heart

Guided by powerful signaling molecules, the human heart develops from ____________

Mesoderm

Identify the posterior surface heart structure indicated by "E"

Middle cardiac vein

Match the following structure with its description: myocardium Glistening white sheet of endothelium lining the inside of the heart Thin, slippery, two-layer membrane Loosely fitting superficial part of the sac enclosing the heart Inner layer of pericardium (called the visceral layer) Middle layer of the heart, composed mainly of cardiac muscle

Middle layer of the heart, composed mainly of cardiac muscle

Failure of which heart valve would allow blood to move from the left ventricle to the left atrium?

Mitral (bicuspid) valve

Match the area of the heart with the "exit" through which the blood leaves: left atrium

Mitral (bicuspid) valve

The role of the atrioventricular node (AV node) is to ______________

Slow down impulses so that the atria can contract to fill the adjacent ventricles with blood

The endocardium is composed of ______________

Squamous epithelium

A condition in which the valve flaps of the heart become stiff and constrict the opening is called _________

Stenosis

Identify the parts of the cardiac conduction system indicated by "C"

Subendocardial conducting network

Match the following term to its correct description: anterior interventricular artery Supplies blood to the lateral right side of the myocardium Supplies blood to the left atrium and posterior walls of the left ventricle Supplies blood to the interventricular septum and anterior walls of both ventricles Runs to the apex of the heart

Supplies blood to the interventricular septum and anterior walls of both ventricles

Match the following term to its correct description: right marginal artery Supplies blood to the lateral right side of the myocardium Supplies blood to the left atrium and posterior walls of the left ventricle Supplies blood to the interventricular septum and anterior walls of both ventricles Runs to the apex of the heart

Supplies blood to the lateral right side of the myocardium

Which of the following phrases describes the circumflex artery? Supplies blood to the left atrium and posterior walls of the left ventricle Supplies blood to the lateral right side of the myocardium Supplies blood to the interventricular septum and anterior walls of both ventricles Runs apex to the heart

Supplies blood to the left atrium and posterior walls of the left ventricles

Match the following term with its correct description: ventricular repolarization QRS complex T wave AV node P wave SA node

T wave

What valve is most often faulty in the heart?

The mitral, or bicuspid, valve

The absolute refractory period refers to the time during which _____________

The muscle cell is not in a position to respond to a stimulus of any strength

Match the following term to its correct description: stroke volume The amount of blood pumped by each ventricle in one minute Contraction The volume of blood pumped by one ventricle with each heartbeat Relaxation Circumflex artery The events associated with blood flow through the heart during one complete heartbeat

The volume of blood pumped by one ventricle with each heartbeat

Indicate the valve separating the following areas of the heart: right atrium and right ventricle

Tricuspid valve

Match the area of the heart with the "exit" through which the blood leaves: right atrium Aortic semilunar valve Tricuspid valve Bicuspid valve Pulmonary semilunar valve

Tricuspid valve

Which of the following phrases describes pulmonary veins? Smallest veins; collect blood from capillaries as it flows back toward heart Branches of pulmonary arteries; structurally like veins and venues, with thin walls and large lumens First vessel leaving the pulmonary side of the heart to carry blood to the lungs Area of exchange for oxygen and carbon dioxide Two from each lung carry blood into the left atrium

Two from each lung carry blood into the left atrium

What is a difference between cardiac muscle and skeletal muscle?

Unlike skeletal muscle cells, cardiac muscle has gap junctions between cells (that allow them to be autorhythmic)

The ____________ nerve carries parasympathetic fibers to the sinoatrial (SA) node

Vagus

Match the following term with its correct description: mitral valve Valve between the right atrium and right ventricle Prevents backflow of blood into the right ventricle Prevents backflow of blood into the left ventricle Valve between the left atrium and left ventricle

Valve between the left atrium and left ventricle

Match the following term with its correct description: tricuspid valve Valve between the left atrium and left ventricle Prevents backflow of blood into the left ventricle Prevents backflow of blood into the right ventricle Valve between the right atrium and right ventricle

Valve between the right atrium and right ventricle

The right atrium receives blood from what structure?

Vena cavae


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