Lecture Quiz #2 Questions
The pulmonary veins carry blood to the
heart
Depolarization of the ventricles is represented on an electrocardiogram by the
QRS Complex
A heart murmur might be caused by
aortic valve insufficiency mitral valve insufficiency pulmonic valve insufficiency, swirling of blood in the ventricle
Identify the structure(s) labeled "8."
papillary muscles
What occurs at the circled label "5" on the graph
peak systolic pressure
Compared to the right ventricle, the left ventricle has all the following characteristics except
pumps a greater volume
The pulmonary semilunar valve prevents backward flow into the
right ventricle
Tetanic muscle contractions don't occur in a normal cardiac muscle because
the refractory period last until the muscle relaxes
The visceral pericardium is the same as the
epicardium
The following is a list of vessels and structures that are associated with the heart. What is the correct order for the flow of blood entering from the systemic circulation? 1. right atrium 2. left atrium 3. right ventricle 4. left ventricle 5. venae cavae 6. aorta 7. pulmonary trunk 8. pulmonary veins
5,1,3,7,8,2,4,6
The adult heart is roughly the size of
a man's clenched fist
Pacemaker cells in the SA node
can spontaneously depolarize
The first heart sound ("lubb") is associated with
closing of the atrioventricular valves
The interventricular sulci and coronary sulcus
contain fat. contain arteries. contain veins. are grooves on the surface of the heart.
The two types of cardiac muscle cells involved in a normal heartbeat include specialized cells of the conducting system and ________ cells.
contractile
A procedure in which a length of the patient's vein or artery is used to create a detour around an obstruction in a coronary artery is called
coronary arterial bypass graft.
Identify the structure labeled "6."
cusp of tricuspid valve
When the left ventricle contracts, the distance from the apex to the base
decreases
The ________ is the amount of blood in a ventricle after it has contracted and before it begins to refill.
end-systolic volume
Which chamber receives oxygenated blood from the pulmonary circuit
left atrium
What is occurring in the left atrium at the circle labeled "2" on the graph?
left atrium is in systole.
The ________ is a remnant of an important fetal blood vessel that once linked the pulmonary and systemic circuits.
ligamentum arteriosum
The coronary sulcus is a groove that
marks the border between the atria and ventricles.
Pacemaker cells isolated from the SA node generate action potentials at ________ beats per minute.
80-100
The cardioacceleratory center activates sympathetic neurons and the cardioinhibitory center controls parasympathetic neurons.
Both parts of the statement are true
