Anatomy 13 Study Guide
T/F - Repolarization occurs just before contraction
False
The "pacemaker" for the heart is usually the
Sinoatrial node
T/F - An ECG is a graphic representation of the hearts electrical activity.
True
Which of the following is not true of the ventricles? a. Have thinner walls than atria b. Pump blood into the arteries c. Are called discharging chambers d. All of these are true
a - have thinner walls than atria
Chordae tendinae
are attached to the AV valves
The heart is supplied with blood by
arteries the branch directly from the aorta
In a normal ECG tracing, the QRS complex represents the
depolarization of the ventricles
The innermost layer of the heart is called the
endocardium
another name for the visceral pericardium is
epicardium
The outermost layer of the heart is called the
epicardium OR visceral pericardium
T/F - About one third of the heart lies to the left of the midline of the sternum.
false
T/F - Atrial systole and ventricular systole occur at the same time.
false
T/F - Both semilunar valves are attached to the heart wall by chordae tendineae.
false
T/F - Cardiac veins empty into the superior vena cava, which drains into the right atrium.
false
T/F - The AV node initiates the contraction of the atria
false
T/F - The QRS complex on an ECG measures the repolarization of the ventricles
false
T/F - The blood in the heart supplies the myocardium with food and oxygen by the process of diffusion.
false
T/F - The bundles of His are the last part of the conduction system of the heart
false
T/F - The chordae tendineae are stringlike structures attached to the semilunar valves.
false
T/F - The coronary sinus carries blood from the aorta to the muscle of the heart.
false
T/F - The first of the heart sounds is caused by the closing of the semilunar valves.
false
T/F - The medically correct name for a "heart attack" is angina pectoris.
false
T/F - The parietal pericardium is also called the epicardium.
false
T/F - The septum, which divides the upper chambers of the heart into right and left sides, is called the interventricular septum.
false
T/F - The stroke volume of a normal resting adult is about 5 liters
false
T/F - The term angioplasty refers to the medical procedure in which a vein from another part of the body is used to direct blood flow around a blocked artery in the heart.
false
T/F - The tricuspid valve keeps blood from flowing back into the left atrium.
false
T/F - The visceral pericardium is also called the endocardium.
false
T/F - Ventricles are referred to as the receiving chambers of the heart.
false
T/F - the T wave tracing measures atrial repolarization
false
T/F - the terms "cardiac output" and "stroke volume" mean the same thing
false
The pericardium is composed of
fibrous connective tissue
The pericardium
has an inner layer called the epicardium AND has an outer layer called the parietal pericardium AND is a sac surrounding the heart
the apical beat can best be heard
in the space between the 5th and 6th rib AND on a line even with the midpoint of the left clavicle
The electrical connectors between heart muscle cells are called
intercalated disks
The pulmonary vein returns oxygen-rich blood to the
left atrium
Blood that has just passed through the bicuspid valve is in the
left ventricle
The heart is located
mostly to the left of the midline of the sternum
Another name for a heart attack is
myocardial infarction
What tracing in a normal ECG is the repolarization of the atria? a - the P wave b - the QRS wave c - the T wave d - none of these
none of these
The superior vena cava carries
oxygen-poor blood to the right atrium
The upper chambers are
recieving chambers
In a normal ECG tracing, the T wave represents the
repolarization of the ventricles
The tricuspid valve is located between the
right atrium and right ventricle
The volume of blood ejected from the ventricles during each beat is called
stroke volume
Cardiac output is
the volume of blood pumped from one ventricle per minute AND about 5 liters in the average adult
The first heart sound is the closing of the
tricuspid and mitral valves
The heart valves are arranged with the
tricuspid and pulmonary semilunar valves on the right side of the heart
T/F - Both a myocardial infarction and angina pectoris are a result of an insufficient amount of oxygen getting to the heart muscle.
true
T/F - Cardiac output in the volume of blood pumped by one ventricle in one minute
true
T/F - Depolarization occurs just before contraction
true
T/F - One of the functions of the pericardium is to reduce the friction created by the beating heart.
true
T/F - Semilunar valves are between ventricles and arteries.
true
T/F - The Purkinje fibers and the bundle of His are involved in the contraction of the ventricles
true
T/F - The QRS complex usually hides the repolarization of the atria
true
T/F - The apex of the heart lies on the diaphragm muscle.
true
T/F - The apical beat of the heart can be heard between the 5th and 6th ribs.
true
T/F - The atria are referred to as the receiving chambers of the heart.
true
T/F - The blunt point of the heart is called the apex of the heart.
true
T/F - The cardiac cycle consists of both systole and diastole
true
T/F - The cardiac cycle consists of both systole and diastole.
true
T/F - The cardiac output will always be larger than the stroke volume
true
T/F - The first of the heart sounds is caused by the closing of the AV valves.
true
T/F - The heart is located in the mediastinum.
true
T/F - The intercalated disks that link the heart cells assist in the efficient conduction of the heart contraction
true
T/F - The mitral valve, the bicuspid valve, and the left atrioventricular valve all refer to the same structure.
true
T/F - The muscle tissue of the heart is called myocardium.
true
T/F - The pericardium consists of two layers, the parietal pericardium and the epicardium.
true
T/F - The sinoatrial node is sometimes called the pacemaker of the heart
true
T/F - Together the cardiovascular and lymphatic vessels make up the circulatory system.
true
T/F - Ventricles are referred to as the discharging chambers of the heart.
true
The apex of the heart is the most inferior and pointed part of the heart.
true
The chambers of the heart include
two lower larger chambers called the ventricles
