Quiz 20 :
Cardiovascular System

The right side of the heart receives blood from the body and pumps through _________ circulation to the lungs.

The delivery of oxygen and nutrients to the tissues of the body is accomplished through ________ circulation.

Which of the following is NOT a function of the heart?

Which of the following is NOT true about the heart?

The heart

The pericardial sac is lined with

The epicardium

A serious condition in which a large amount of fluid accumulates in the pericardial cavity and puts pressure of the heart is

Another name for the visceral pericardium is the

Which of the following pairs is mismatched?

A stab wound into the heart can result in cardiac tamponade. This means that

Which of the following layers forms the bulk of the heart wall?

The function of the pericardial fluid is to

Blood vessels enter and exit from the _____ of the heart.

Blood in the pulmonary veins returns to the

The great cardiac vein and middle cardiac vein empty into a venous cavity called the

All cardiac veins empty into the _________, which then empties into the _______.

Occlusion of which of the following would primarily damage the posterior wall of the heart?

Which of these statements is true?

A direct connection between arteries is called a/an

Blood flow through the coronary blood vessels decreases during myocardial contraction and increases during myocardial relaxation.

Coronary artery disease can diminish myocardial blood flow resulting in the death of myocardial cells. This condition is known as a myocardial

The procedure whereby a small balloon is placed into a partially occluded coronary artery and then inflated to increase blood flow through the artery is called a(n)

Angina pectoris is chest pain caused by reduced

Which of the following is NOT an enzyme given to someone experiencing a myocardial infarction to break up blood clots?

Which of the following is NOT a major opening into the right atrium?

The right atrium receives blood from

What is the foramen ovale?

What vessel exits the left ventricle?

The AV valve that is located on the same side of the heart as the origin of the aorta is the

The valve located between the right ventricle and the pulmonary trunk is the

Contraction of the papillary muscles would

The chordae tendineae

Blood in the superior vena cava will enter the _____.

Which vessels empty blood into the left atrium?

Which blood vessel carries blood from the left ventricle?

From the right ventricle, blood flows directly into the _____.

Which vessels transport blood to the right and left lungs?

An incompetent pulmonary semilunar valve could result in less blood reaching the

Which of the following heart chambers is correctly associated with the blood vessel that enters or leaves it?

Which of the following is a function of the heart skeleton?

Cardiac muscle cells

Which of the following phrases would apply to cardiac muscle cells?

Action potentials pass from one myocardial cell to another through areas of low electrical resistance called

The "pacemaker" of the heart is the

Which of the following sequences for the conducting system is correct?

What is the importance of the delay in the action potential in the AV node?

Energy for contraction of myocardial cells comes primarily from

The cardiac electrical impulse normally begins spontaneously in the SA node because

Which of the following will depolarize immediately after the AV node depolarizes?

Ventricular contraction begins at the

The action potentials are slowed at the AV node to allow the

The spontaneous opening of sodium channels marks the beginning of ____ of a myocardial cell.

The plateau phase seen during the action potential of a cardiac muscle cell is due to the

When a pacemaker potential in the SA node reaches threshold,

If the SA node is nonfunctional, which of the following is most likely to occur?

Which of the following events occurs first?

Calcium channel blockers are frequently used to

Depolarization of a cardiac muscle cell occurs as the result of

When comparing cardiac muscle cells and skeletal muscle cells,

What action is most responsible for the resting membrane potential in cardiac muscle cells?

Which of the following is mismatched?

Which of the following would result from a reduced function of the sodium channels in the SA node?

Which of the following areas of the conduction system would produce spontaneous action potentials most frequently if the SA node were not functioning?

The long refractory period observed in cardiac muscle

The period of time in which the myocardium is insensitive to further stimulation is called the

If cardiac muscle cells are unable to repolarize, this would cause

In a normal electrocardiogram, the

The P wave of an ECG indicates

Of the types of damage resulting from a myocardial infarction, which is most likely to cause the greatest increase in the Q-T interval?

What event(s) occur during the QRS complex of an ECG?

What abnormal heart rhythm could be caused by an elevated body temperature, excessive sympathetic stimulation, or toxic conditions?

What cardiac arrhythmia will have no QRS complex as a symptom?

Variations in respiratory rate is a symptom of

Contraction of the ventricles is referred to as ventricular

In the cardiac cycle,

In the cardiac cycle,

The period of isovolumetric contraction is immediately followed by

When left atrial pressure exceeds left ventricular pressure,

Blood does not enter or leave the ventricles during the period called

During the ejection phase of the cardiac cycle, blood exits the left ventricle through the

Pressure in the right ventricle must exceed pressure in the ____ before the right ventricle can eject blood.

The chamber of the heart that endures the highest pressure is the

The tricuspid valve is closed

As soon as left ventricular pressure exceeds the pressure in the aorta, the

During the isovolumetric contraction period of the cardiac cycle,

When ventricular pressure exceeds atrial pressure, the

What occurs during the time between the first heart sound and the second heart sound?

Concerning heart sounds, which of the following is correct?

The first and second heart sounds are most directly related to

Which of the following is true?

Regurgitation of blood flow through the aortic semilunar valve would give rise to

An incompetent mitral valve may cause blood to back up into the

The volume of blood pumped during each cardiac cycle is the

The product of the stroke volume times the heart rate is known as the

End-diastolic volume minus end-systolic volume is equal to

Mean arterial pressure is

The dicrotic notch in the aortic pressure curve is due to the

Afterload is

Which of the following statements regarding intrinsic regulation of the heart is true?

Within normal limits, an increase in preload leads to

The relationship between preload and stroke volume is known as

Stimulation of the heart via the sympathetic nerves would

If the heart receives more sympathetic stimulation than parasympathetic stimulation, the heart will

Increased vagal stimulation would cause

Which of the following factors would cause an increase in heart rate?

The baroreceptor reflex would cause which of the following events to occur if the reflex was caused by an increase in blood pressure?

Baroreceptor reflexes

In a physiology lab, the students designed an experiment to illustrate how the heart responds to changes in blood pressure. Everyone relaxed and then did a headstand. Which of the following observations are consistent with the change in the function of their hearts?

Which of the following will increase the heart rate?

The cardioregulatory center of the brain is located in the

Chemoreceptors sensitive to blood carbon dioxide levels are primarily located in the

Chemoreceptors sensitive to blood oxygen levels are primarily located in the

An increase in extracellular calcium generally increases

Excess potassium ions in cardiac tissue cause

Lowered extracellular potassium levels will lower the heart rate because

Why is body temperature sometimes reduced during heart surgery?

Aortic stenosis results from

Which of the following might increase the risk for cardiovascular disease?

Fred was admitted to the cardiac unit with chest pains. No arrhythmias and no large changes in the heart rate were observable. Blood samples taken over the next few days showed no increase in enzymes such as creatine phosphokinase. A possible treatment of the condition is

During hemorrhagic shock in which blood pressure is decreased, which of the regulatory mechanisms is most important is increasing cardiac output to help maintain blood pressure?

Why is it important to use an antibiotic other than ampicillin in the treatment of bacterial pneumonia?

All of the following are functions of the heart, except _____________________.

The adult heart averages ___________ grams.

A knowledge of heart location would NOT be important for which of the following?

The inner lining of the pericardial cavity is the ____________ pericardium, whereas the outer part of the heart wall is called the epicardium or the _______________ pericardium.

What must occur during exercise to ensure adequate oxygen delivery to cardiac muscle?

All of the following characteristics of the sarcoplasmic reticulum in cardiac muscle cells are true except ________________.

Identify the structures that contribute to the slow onset of contraction and prolonged contraction phase in cardiac muscle tissue.

Calcium-induced calcium release occurs when

The ion primarily responsible for depolarization in pacemaker cells is ______________, whereas the ion primarily responsible for this in other cardiac cells is _____________.

Where is blood moving during the period of ejection?

Under resting conditions, the normal stroke volume is approximately ___________.

All of the following cardiac measurements will increase during exercise except ____________________.

Small changes in _____________ will have a large impact on the heart's pumping effectiveness, while large changes in ___________ do not impact the effectiveness much.

The peripheral chemoreceptors that respond to oxygen levels of the blood and regulate heart activity are located in _______________.

All of the following structural changes found in the heart occur with the normal aging process, except ___________________.

A patient has been diagnosed with mild heart disease. Tests show that some of the coronary arteries are partially occluded. Which of the following is the best course of action to treat the disease?

Diagnostic tests done on a patient show that many coronary arteries, including the left main coronary artery are severely narrowed. Which of the following is the best course of action to treat this patient?