56 notecards = 14 pages (4 cards per page)
Cardiac output is __________.
D)the amount of blood pumped out of each ventricle in one minute
Choose the correct sequence of current flow through the heart wall.
B)SA node, AV node, AV bundle, right and left bundle branches, Purkinje fibers
During pulmonary circulation, blood leaves the __________.
C)right ventricle and moves to the lungs
During systemic circulation, blood leaves the __________.
B)right ventricle and goes directly to the aorta
Identify the correct sequence of blood flow through the chambers of the heart.
D)right atrium, right ventricle, lungs, left atrium, left ventricle
The absolute refractory period refers to the time during which __________.
C)the muscle cell is not in a position to respond to a stimulus of any strength
The cardiac cycle includes all of the following events EXCEPT __________.
D)the number of times the heart beats in one minute
The coronary arteries arise from the __________.
The endocardium is composed of __________.
C)simple squamous epithelium
The inferior vena cava brings blood from the lower regions of the body and empties into the __________.
The inner lining of the fibrous pericardium is formed by the __________.
D)parietal layer of serous pericardium
The interventricular septum forms a dividing wall between the __________.
E)left and right ventricles
The normal pacemaker of the heart is the __________.
The tricuspid valve is located between the __________.
E)right atrium and right ventricle
When the mitral valve closes, it prevents the backflow of blood from the __________.
B)left ventricle into the left atrium
Which is the correct sequence of layers in the heart wall, starting with the outer layer?
C)epicardium, myocardium, endocardium
Which of the following statements is NOT true about the shape, position, and location of the heart?
D)The heart is enclosed in a double-layered sac called the pleural membrane.
The vessels that carry oxygen to the myocardium are called __________.
The cells of the myocardium behave as a single, coordinated unit called a __________.
The ability of some cardiac muscle cells to initiate their own depolarization and cause depolarization of the rest of the heart is called __________.
Guided by powerful signaling molecules, the human heart develops from __________.
Which of the following structures lies on the outside surface of the heart and is an integral part of the cardiac wall?
The trabeculae carneae are located in the __________.
What part of the heart is considered the systemic circuit pump?
C)the left ventricle
The __________ are attached to the AV valve flaps.
Which of the following valves is most often faulty in the heart?
C)the mitral, or bicuspid, valve
Which of the following factors gives the myocardium its high resistance to fatigue?
D)a very large number of mitochondria in the cytoplasm
The __________ nerve carries parasympathetic fibers to the sinoatrial (SA) node.
An enlarged R wave on an ECG would indicate __________.
D)an enlarged ventricle
A doctor puts his stethoscope on a patient's chest over the location of the heart and hears a swishing sound. Which of the following conditions is the best diagnosis for the patient's condition?
A)incompetent cardiac valve
Which of the following is NOT a role of the pericardium?
D)It facilitates heart contraction.
The lining of the heart chambers is called the __________.
The superior chambers of the heart are called the __________.
Freshly oxygenated blood is delivered to the __________ and then it passes into the __________ to be pumped to the entire body.
D)left atrium; left ventricle
Into which chamber of the heart do the pulmonary veins deliver blood?
right marginal artery
C)supplies blood to the lateral right side of the myocardium
posterior interventricular artery
D)runs to the apex of the heart
anterior interventricular artery
B)supplies blood to the interventricular septum and anterior walls of both ventricles
A)supplies blood to the left atrium and posterior walls of the left ventricle
The most muscular chamber of the heart is the __________.
B)valve between the right atrium and right ventricle
D)valve between the left atrium and left ventricle
aortic semilunar valve
A)prevents backflow of blood into the left ventricle
pulmonary semilunar valve
C)prevents backflow of blood into the right ventricle
Which of the following is a difference between cardiac muscle and skeletal muscle?
A)Unlike skeletal muscle cells, cardiac muscle cells can be autorhythmic
The role of the atrioventricular node (AV node) is to __________.
B)initiate a sinus rhythm
Which is correctly paired?
D)ectopic focus: an abnormal pacemaker
The P wave of an electrocardiogram represents __________.
The second heart sound (the 'dup' of 'lub-dup') is caused by the __________.
D)closure of the semilunar valves
E)the events associated with blood flow through the heart during one complete heartbeat
C)the volume of blood pumped by one ventricle with each heartbeat
D)the amount of blood pumped by each ventricle in one minute
Which of the following would lead to a decrease in heart rate?
True or False