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Flashcards in Quiz 6 Deck (11)
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1
Q

in the cardiovascular system, what is the pulmonary circuit

A

The heart pumps a volume of blood into the lungs which after getting oxygenated is transported back to heart. This oxygenated blood is then pumped out of the heart and into the aorta and subsequently into the systemic circulation

2
Q

The ___ is a hole that connects the atria in mammalian fetus

A

foramen ovale

3
Q

why does the hole above exist

A

to prevent blood flow to the right ventricle of the heart from going to the lungs since the lungs in a fetus do not work in the womb

4
Q

The purpose of having valves in the cardiovascular system is to

A

ensure that blood flows in one direction

5
Q

the function of the pericardial fluid is to

A

reduces friction between the heart and the pericardium

6
Q

The term myogenic indicates that the heart muscle is the source of

A

the electric signal that triggers heart contraction

7
Q

the flattening of the action potentials of myocardial contractile cells, called the plateau phase, is due to a combination of ___ K+ permeability and ___ Ca2+ permeability

A

decreasing, increasing

8
Q

the importance of the plateau phase of the action potential of myocardial cells is in

A

preventing tetanus

9
Q

the depolarization of the pacemaker action potential spreads to adjacent cells through

A

gap junctions

10
Q

the AV nice is important because it

A

delays the transmission of the electrical impulses to the ventricles in order for the atria to finish contracting

11
Q

The QRS complex of an ECG corresponds to

A

the progressive wave of ventricular depolarization