Which of the following would you expect to have the lowest resting...
Heart rate is controlled by neurons of the cardiovascular center...
When will the blood pressure be greater?
The heart is innervated by ________ nerves.
Arteriosclerosis can lead to
Which of the following affects blood flow through the body?
Which of the following are characteristics of cardiovascular...
The ________ ventricle has a greater workload than the ________.
The hormone that produces cardiovascular effects similar to activation...
When the left ventricle contracts, the diameter of the ventricular...
Stroke volume depends on
In the middle of the thoracic cavity is a region occupied by the...
The atrioventricular valves permit blood flow
When the semilunar valves close, the AV valves then
Which of the following would have the greater effect on vascular...
The continual movement of fluid through the interstitial spaces...
Edema is favored when
The earlike extension of the atrium is the
Cardiac output is increased by
The function of the atrium is to
Use Figure 18-1 to answer the following questions:...
Which of the following is greater during left ventricular systole?
The following are structural components of the conducting system of...
During exercise
After losing 25 percent of blood volume in a motorcycle accident,...
Turbulent blood flow occurs
Materials can move across capillary walls by
Pacemaker cells isolated from the SA node generate action potentials...
________ is to slow heart rate as ________ is to fast heart rate.
Exchange between a blood vessel and the cells that surround it can...
To defend blood volume against dehydration, the body
The right ventricle pumps blood to the
The left ventricle pumps blood to the
The pulmonary arteries carry blood to the
The pulmonary veins carry blood to the
Use Figure 18-1 to answer the following questions:...
The bicuspid or mitral valve is located
Most of the middle layer in the heart wall is composed of
As a result of the long refractory period in the cardiac action...
There are ________ pulmonary veins.
In response to hemorrhage, there is
Which of the following would be greater?
When the left ventricle contracts, the distance from the apex to the...
Averaged over a few heartbeats, venous return is ________ cardiac...
Blood pressure increases with all of the following, except increased
Which of the following would increase heart rate?
The interventricular sulci and coronary sulcus contain
The phase in the cardiac cycle when the mitral valve is closed and the...
The volume of blood ejected from each ventricle during a contraction...
At a heart rate of 60 beats/minute, a cardiac cycle lasts
Acetylcholine slows the heart because it
Use Figure 18-1 to answer the following questions:...
The term used to describe fluid collecting in the pericardial cavity...
The heart beats approximately ________ times each day.
As blood leaves the right ventricle it passes through the ________ and...
The difference between the systolic and diastolic pressures is called...
Activation of which kind of receptor causes heart rate to increase?
Use Figure 18-1 to answer the following questions:...
Rupture of the papillary muscles in the left ventricle may result in
In which of the following would the resistance be greater?
Use Figure 18-2 to answer the following question:...
Which of the following descriptions matches the term near the left...
Intercalated discs serve to transfer ________ from cell to cell.
The right atrium receives blood from the
The wall of the left ventricle is thicker than the right because
Total peripheral resistance is related to all of the following, except...
If the pacemaker cells in the SA node become more permeable to...
Venoconstriction ________ the amount of blood within the venous...
The AV node delivers the stimulus to the AV bundle, located within the...
Drugs that block the beta-one adrenergic receptors will
Blood flowing into the heart from the venae cavae flows next through...
During the cardiac cycle, the
Abnormally slow depolarization of the ventricles would most change the...
The first heart sound is heard when the
Blood pressure is highest here.
Use Figure 18-1 to answer the following questions:...
________ is to contraction as ________ is to relaxation.
During ventricular systole, the
In which of the following would the blood flow be highest?
If blood pressure doubled, the blood flow through a vessel would be
Blood pressure is lowest in the
The heart pumps approximately ________ milliliters of blood each...
The blood colloid osmotic pressure mostly depends on the
The visceral pericardium is the same as the
Depolarization of the ventricles is represented on an...
Compared to the right ventricle, the left ventricle has all the...
The following is a list of vessels and structures that are associated...
The mitral valve closes
Each of the following will cause an increase in blood pressure, except
Which of the following changes doesn't occur during exercise...
The ________ deliver(s) blood to the myocardium.
The ________ valve prevents backward flow into the left atrium.
If a person has a blood pressure of 120/90, his mean arterial pressure...
In comparing a trained athlete to a non-athlete, which of these...
The cusps (leaflets) of atrioventricular valves attach directly to
Complications related to arteriosclerosis account for roughly ________...
The normal pacemaker of the heart is located in the
When renin is released from the kidney
In cardiac muscle, the fast depolarization phase of the action...
Blood leaves the right ventricle by passing through the
Analysis of the electrocardiogram can reveal all of the following,...
Depolarization of the atria corresponds to the ECG's
Blood is supplied to the myocardium by
The P wave of the electrocardiogram is a signal from
Contractions of the papillary muscles
As blood travels from arteries to veins,
Which of the following factors will increase the net filtration...
The coronary sulcus is a groove that
Cardiac output can be increased by all of the following except one....
David suffers from a prolapsed mitral valve. This condition would...
Each of the following will lead to a decrease in blood pressure,...
Blood returning to the heart from the systemic circuit first enters...
Blood returning to the heart from the pulmonary circuit first enters...
Which of these would cause stroke volume to increase?
The T wave on an ECG tracing represents
The foramen ovale in the fetal heart is located in the
The vascular pressure that declines from roughly 35 mm Hg to about 18...
Stimulation of the aortic baroreceptors results in
The first blood vessels to branch from the aorta are the ________...
ADH and aldosterone secretion are part of the body's long-term...
Each of the following changes will result in increased blood flow to a...
The main control of peripheral resistance by the vasomotor centers...
The cardioacceleratory center activates sympathetic neurons and the...
During the T wave of the electrocardiogram, the ventricles are
The great and middle cardiac veins drain blood into the
Drugs known as calcium channel blockers such as nifedipine can be used...
Use Figure 18-2 to answer the following question:...
Which of the following statements is false concerning the movement of...
If the connection between the SA node and AV node becomes blocked,
The long plateau phase of the cardiac muscle action potential is due...
The first heart sound ("lubb")
Increased levels of carbon dioxide in the blood will result in...
Tetanic muscle contractions don't occur in a normal cardiac muscle...
Homeostatic mechanisms in response to blood loss include all of the...
If there is a complete block between the SA node and the AV node, how...
Blood is supplied to the left atrium by the
Pacemaker cells in the SA node
The marginal branch and posterior interventricular branch are branches...
The circumflex branch and the anterior interventricular artery are...
Each of the following factors will increase cardiac output, except
Coronary veins empty into the
An increase in the rate of action potentials from baroreceptors will...
In cardiac muscle
The pulmonary semilunar valve prevents backward flow into the
Each of the following factors would increase peripheral resistance,...
Use Figure 18-2 to answer the following question:...
If the connection between the vagus nerve and the heart is cut, which...
Use Figure 18-2 to answer the following question:...
Paul has a horrible chainsaw accident and cuts several major blood...
During the isovolumetric contraction phase of ventricular systole, the
Use Figure 18-2 to answer the following question:...
What effect would compressing the inferior vena cava just below the...
If a patient's tricuspid valve was leaking during systole, what...
Blood flow to a tissue will increase if the