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