Chapter 18 Flashcards
What are the two largest vessels that receive blood from the left and right ventricles
Aorta and pulmonary trunks
What are the two largest vessels that transport blood to the right atrium.
Superior and inferior vena cava
Which vessels return oxygenated blood to the left atrium.
Pulmanary veins.
Oxygen rich blood is pumped to the entire body by the _____ ventricle
Left
The right side of the Herat pumps blood to what circuit
Pulmonary
Which cell junction acts as an anchor, holding the cells together as the heart beats
Desmosome
Which cell junction allows ions to move across the hear from cell to cell so that the heart beats as an entire unit
Gap junction
Where are the gap junctions and the desmosomes located
Intercalated disk
Which valve is located between the right ventricle and the pulmonary trunk
Pulmonary semilunar valve
Which valve is located between the left atrium and the left ventricle
Bicuspid valve
Which of the following is NOT a role of the pericardium?
It facilitates heart contraction.
The lining of the heart chambers is called the __________.
endocardium
The superior chambers of the heart are called the __________.
atria
Freshly oxygenated blood is delivered to the __________ and then it passes into the __________ to be pumped to the entire body.
left atrium; left ventricle
Into which chamber of the heart do the pulmonary veins deliver blood?
:
left atrium
right marginal artery
C. supplies blood to the lateral right side of the myocardium
posterior interventricular artery
. runs to the apex of the heart
anterior interventricular artery
supplies blood to the interventricular septum and anterior walls of both ventricles
circumflex artery
supplies blood to the left atrium and posterior walls of the left ventricle
The most muscular chamber of the heart is the __________.
left ventricle
tricuspid valve
valve between the right atrium and right ventricle
mitral valve
valve between the left atrium and left ventricle
aortic semilunar valve
prevents backflow of blood into the left ventricle
pulmonary semilunar valve
prevents backflow of blood into the right ventricle
Which of the following is a difference between cardiac muscle and skeletal muscle?
Unlike skeletal muscle cells, cardiac muscle cells can be autorhythmic.
he role of the atrioventricular node (AV node) is to __________.
slow down impulses so that the atria can contract to fill the adjacent ventricles with blood
The P wave of an electrocardiogram represents __________.
atrial depolarization
he second heart sound (the ‘dup’ of ‘lub-dup’) is caused by the __________.
closure of the semilunar valves
cardiac cycle
the events associated with blood flow through the heart during one complete heartbeat
systole
contraction
diastole
relaxation
stroke volume
the volume of blood pumped by one ventricle with each heartbeat
cardiac output
the amount of blood pumped by each ventricle in one minute
Which of the following would lead to a decrease in heart rate?
parasympathetic stimulation
In the fetus, blood from the left and right sides of the heart normally mix.
True
