Powerpoint 5 Flashcards
___ means natural or inherent.
Intrinsic
____ is pertaining to anything external or originating outside a structure or organism.
Extrinsic
The heart is a ___ sided muscular pump.
Two
The ____ are conduits / function as passive reservoirs.
Atria
____ are the main pressure pumps.
Ventricles
What is the circulation path through the right side of the heart?
Enters the right atrium via SVC, IVC, and Coronary sinus
- right atrium
- tricuspid valve
- right ventricle
- out infundibulum (RVOT)
- pulmonic valve
- pulmonary artery and branches
- pulmonic circulation (lungs)
What is the circulation path through the left side of the heart?
Enters left atrium via pulmonary veins from left and right lungs
- left atrium
- mitral valve
- left ventricle
- out left ventricle outflow tract (LVOT)
- arotic valve
- aorta and it’s branches
- systemic periphery circulation (cerebral, peripheral, abdomen)
The ____ ____ of the heart is responsible for initiation, propagation, and coordination of the heartbeat.
Conduction system
The ____ ____ provides bursts of electrical nerve impulses beginning at the superior portion of the atria.
SA node
What directs impulses to the AV node?
Internodal pathways
At the ____ ____, impulses slow and delay as they are sent to the bundle of HIS.
AV node
What conducts impulses to ventricles via bundle branches?
Bundle of HIS
Where does ventricular contraction begin?
At the ventricular septum, to apex, then up free walls and back to the base of the heart.
What is the part of the nervous system that regulates involuntary body functions, including the activity of the cardiac muscle, smooth muscles, and glands?
Autonomic nervous system
The subsystems _____ and _____ are reciprocally innervated, and therefore have opposite effects on the heart.
Sympathetic and parasympathetic
The ____ nervous system increases your heart rate, force of contraction, and transmission of impulses.
Sympathetic
The ____ nervous system decreases your heart rate, force of contraction, and transmission of impulses.
Parasympathetic
_____ events are represented on an EKG waveform.
Electrical
_____ events (as a result of contraction) are represented as pressure curves/waveforms.
Pressure
Atrial depolarization/contraction is represented by the ____ on an EKG.
P-wave
On an EKG, what represents NA+ entering the cell and K+ exiting the cell?
P-wave
The PR interval is the slowing of impulse through the ____ ____.
AV node
Ventricular septal depolarization is represented by the ____ on an EKG.
Q-wave
Ventricle depolarization is represented by the ____ on an EKG.
QRS
On an EKG, what corresponds with the plateau phase?
ST segment
Ventricular repolarization is represented by the ____ on an EKG.
T-wave
On an EKG, what represents K+ entering the cell and NA+ exiting the cell?
T-wave
What are the phases of ventricular diastole?
- Isovolumic relaxation
- Passive filling (rapid and reduced phases)
- Atrial systole (P-wave)
What are the phases of ventricular systole?
- Isovolumic contraction (QRS)
- Ejection (rapid and reduced phases)
During isovolumic relaxation and contraction ____ valves are closed.
All
Passive filling consists of ____ and ____ filling.
Rapid and reduced
During rapid filling ____% of ventricular filling occurs.
70%
During reduced filling ____% of ventricular filling occurs.
30%
____ ____ forces remaining blood into ventricles.
Atrial systole
During isovolumic contraction, ____ pressure rises above ____ pressure
Ventricular; atrial
