Chapter 18- The Heart
True or False: The myocardium receives its blood supply from the coronary arteries.
TRue
The term for pain associated with deficient blood delivery to the heart that may be caused by the transient spasm of coronary arteries is ________.
angina pectoris
The P wave of a normal electrocardiogram indicates ________.
atrial depolarization
Damage to the ________ is the most common cause of heart block.
atrioventricular (AV) node
The source of blood carried to capillaries in the myocardium would be the ________.
coronary arteries
What is the pattern of the EKG in the illustration below?
heart block
What is the function of the auricles?
increase atrial volume
The death of heart muscle cells is known as __________.
infarction
Which of the following transports oxygen-rich blood?
pulmonary vein
The left ventricular wall of the heart is thicker than the right wall in order to ________.
pump blood with greater pressure
Isovolumetric contraction ________.
refers to the short period during ventricular systole when the ventricles are completely closed chambers
To listen to the aortic semilunar valve, you would place your stethoscope in the ________.
second intercostal space to the right of the sternum
In the illustration of the heart below, which structure is correctly identified by the letter "G"?
vena cava
If a healthy "normal" blood pressure is 120/80, what is the 120 associated with?
ventricular systole
Which of the following is the correct term for the membrane that directly touches the outside surface of the heart?
visceral pericardium
The atrioventricular (AV) valves are closed ________.
when the ventricles are in systole
The atrioventricular valves are closed __________.
when the ventricles are in systole
What is the expected heart rate for a person that has no EEG?
100/bpm
The foramen ovale ________.
connected the two atria in the fetal heart
In the illustration of the heart below, which structure is correctly identified by the letter "B"------- cut in half heart
AV node
The source of blood carried to capillaries in the myocardium would be the ___________.
Coronary arteries
What is another name for the layer of tissue lining the inside of the heart?
Endocardium
True or False: Auricles slightly increase blood volume in the ventricles of mammals.
False
True or False: Cardiac muscle tissue that is damaged by a myocardial infarct is replaced by cardiac muscle tissue.
False
True or False: Heart tissue is supplied with oxygen and nutrients primarily by diffusion from the heart chambers through the myocardium
False
True or False: Heart tissue is supplied with oxygen and nutrients primarily by diffusion from the heart chambers through the myocardium.
False
True or False: The "lub" sounds of the heart are valuable in diagnosis because they provide information about the function of the heart's pulmonary and aortic semilunar valves.
False
In the illustration of the heart below, which letter identifies the valve that is most likely to prolapse during ventricular systole?
G
What is the pattern of the EKG in the illustration below?
Junctional Rhythm
In the illustration of the heart below, which structure is identified by the letter "C"?
Pulmonary veins
In the illustration below, the letter "E" identifies which of the following structures?
Purkinje fibers
In the illustration of the heart below, which structure is correctly identified by the letter "B"
Right Pulmonary veins
Select the correct statement about the heart valves.
The atrioventricular (AV) valves prevent backflow of blood into the atria during ventricular contraction.
Select the correct statement about the structure of the heart wall.
The myocardium is the layer of the heart that actually contracts.
True or False: As pressure in the aorta rises due to atherosclerosis, more ventricular pressure is required to open the aortic valve.
True
True or False: The right side of the heart pumps the same volume of blood as the left side of the heart
True
Which of the events below does NOT occur when the semilunar valves are open?
Ventricles are in diastole.
During the period of ventricular filling ________.
blood flows mostly passively through the atria and the open AV valves into the ventricles
In the illustration below, what is happening during the second half of the P-Q interval?
blood is filling the ventricles
Which of the following receive(s) blood during ventricular systole?
both the aorta and pulmonary trunk
the condition where fluid compresses the heart and limits its ability to contract is called __________.
cardiac temponade
In the illustration of the heart below, which structure is correctly identified by the letter "E"
circumflex artery
When does the period of atrial repolarization occur?
during ventricular depolarization
Which of the following factors does not influence the heart rate?
ethnicity
Blood within the pulmonary veins returns to the ________.
left atrium
In the illustration of the heart below, which structure is correctly identified by the letter "A"
marginal artery
What is the pattern of the EKG in the image below?
normal sinus rhythm
In the illustration below, which of the following in NOT true of events associated with the letter "C"?
the mitral valve is open
During exercise, which of the following would occur on an electrocardiogram compared to an individual at rest?
the time from one R to the R of the next heartbeat would decrease
In the illustration of the heart below, which structure is identified by the letter "B"? Black and White half heart
tricuspid valve
