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Terms in this set (58)
Which statement is correct regarding the ventricles?
The right ventricle empties into the pulmonary trunk.
The P wave on an electrocardiogram represents
The presence of an incompetent tricuspid valve would have the direct effect of causing
reduced efficiency in the delivery of blood to the lungs
Which layer of the typical vessel can be regulated to constrict or dilate the lumen?
Which of the following is true regarding veins?
Veins have valves; arteries do not.
Which layer of the typical blood vessel is constructed from simple squamous epithelium?
Identify the most muscular chamber.
Name the inner lining of the heart.
Identify the valve found between the left atrium and left ventricle.
What heart chamber pushes blood through the aortic semilunar valve?
Name the irregular ridges of muscle lining the ventricles.
What fibrous structure functions to anchor the atrioventricular valves in a closed position?
Blood on the right never mixes with blood on the left, once the heart is fully developed.
Which valve is located between the right atrium and ventricle?
The most permeable capillaries, which contain fenestrations and large intercellular clefts, are called
What type of vessel has a relatively large amount of smooth muscle compared to its elastic tissue?
Why are gap junctions a vital part of the intercellular connection of cardiac muscles?
Gap junctions allow action potentials to spread to connected cells.
During which portion of the electrocardiogram do the atrioventricular valves close, correlating with the first heart sound ("lub")?
Which portion of the electrocardiogram represents the time during which the ventricles are in systole?
Which of the following form successively larger vessels that carry blood toward the heart?
Which of these vessels returns blood to the left atrium of the heart?
What does the QRS wave of the electrocardiogram (ECG) represent?
Which of the following is characteristic of veins but not arteries?
larger internal diameter
Which portion of the electrocardiogram represents the wave-like change in charge in the positive direction received by the atria from the sinoatrial (SA) node?
Which layer of the heart wall contracts and is composed primarily of cardiac muscle tissue?
Blood enters the left and right coronary arteries directly from which vessel or chamber?
Which of the following is not a capillary transport mechanism that allows for the exchange of nutrients and gases?
Name the ridged bundles of muscle found projecting inside the right atrium.
Identify the right atrioventricular valve.
Identfiy the valve located at the exit of the right ventricle.
Pulmonary semilunar valve
The moderator band is found on both the right and left side of the heart.
false- just the right side
Oxygenated blood flows through the right side of the heart.
false- flows through the left atrium
The right tricuspid valve prevents backflow of blood from the right ventricle into the
Arteries always carry oxygenated blood away from the heart.
What type of vessel is capable of allowing the passage of gases and nutrients though its walls to nourish surrounding tissue?
Continuous capillaries are the most common capillaries in the body.
The __________ valve is located between the right atrium and the right ventricle.
Which of the following CANNOT diffuse across a capillary wall to or from the surrounding interstitial fluid?
Large diameter, thick-walled arteries that are close to the heart and act as pressure reservoirs are called
Which heart chamber receives oxygenated blood from the lungs?
Cardiac muscle tissue
Myofibrils of cardiac muscle tissue vary in diameter and branch extensively.
Which of the following does NOT deliver deoxygenated blood to the heart?
The right side of the heart is considered the systemic circuit pump.
Specifically, what part of the intrinsic conduction system stimulates the atrioventricular (AV) node to conduct impulses to the atrioventricular bundle?
sinoatrial (SA) node
The role of the chordae tendineae is to open the AV valves at the appropriate time.
What structures connect the individual heart muscle cells?
Which type of vessel is most suited to expanding and recoiling in response to the ejection of blood from the heart?
Which of the following structures receives the depolarization wave from the atria and passes impulses onto the ventricles?
Which of the following is the innermost layer of the heart?
What separates the parietal and visceral pericardium?
The source of blood carried to capillaries in the myocardium would be the
The atrioventricular (AV) valves prevent backflow of blood into the atria during ventricular contraction.
The P wave of a normal electrocardiogram indicates
Vessels that carry blood from the lungs to the heart filling the left atrium.
Initiates the cardiac cycle
Double layer serous membrane that surrounds the heart.
Chest pain usually due to reduced blood flow to heart tissues; weakens cardiac muscle.
On the models in lab, why are pulmonary arteries blue instead of being red like the rest?
the blue represents that the blood is not oxygenated
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