anatomy multiple choice
The length of the cardiac cycle is normally ________ second(s) in length.
.08
What part of the heart's intrinsic conduction system carries impulses into the interventricular septum?
AV bundle
correct path for the transmission of an impulse in the intrinsic conduction system of the heart
SA node, AV node, AV bundle, bundle branches, Purkinje fibers
cardiac output
amount of blood pumped out of each side of heart
blood vessels with oxygen rich blood
aorta pulmonary veins
Pulmonary arteries transport ________.
blood rich in carbon dioxide to the lungs
angina pectoris
chest pain
The heart sounds "lub" and "dup" result from ________.
closure of heart valves
When ventricles ________, the AV valves are closed.
contract
systole
contraction of heart
Which of the following supply the myocardium with oxygen-rich blood?
coronary arteries
ventricles
discharging chamber of heart
bradycardia
heart rate that is slower than normal
Pericarditis is most closely related to which of the following cardiac conditions?
inadequate amounts of serous fluid
The walls of the ________ are substantially thicker because that chamber acts as the more powerful systemic pump of the heart.
left ventricle
Pulmonary circulation involves blood flow to and from the heart and the ________.
lungs
The bicuspid valve is also referred to as the ________ valve.
mitral
What is the function of the heart valves?
prevents backflow of blood
The transportation of blood from the right side of the heart to the lungs and back to the left side of the heart is known as ________ circulation.
pulmonary
blood vessels with oxygen poor blood
pulmonary trunk venae cavae pulmonary arteries
Which one of the following blood vessels carries oxygenated blood?
pulmonary veins
tachycardia
rapid heart rate
atria
receiving chamber of heart
diastole
relaxtion of heart
trace a drop of blood through the heart
right atrium, tricuspid valve, right ventricle, pulmonary semilunar valve, pulmonary trunk, left and right arteries, pulmonary capillaries, pulmonary veins, left atrium, bicuspid valve, left ventricle, aortic semilunar valve, aorta, systematic arteries, systematic capillaries, systematic veins, vena cavas
what decreases heart rate?
stimulation by vagus nerves
The volume of blood pumped out of a ventricle with each heartbeat is known as ________.
stroke volume
During mid-to-late diastole, blood flows from the atria to the ________.
ventricles
The mitral valve is normally closed ________.
when the ventricle is in systole
The average heart beats about ________ times per minute.
75
myocardial infarction
a heart attack
