Queen of Hearts
The very bottom of the heart is called the ___________.
Apex
The wall between the ventricles is called the
Interventricular Septum
Systole is the period of time when the heart is __________
Contracting
When the sympathetic nervous system is activated, heart rate increases and blood pressure ________.
Increases
T is for test. This medical test is used to see the electrical events of the heart
ECG
The right side of the heart sends blood to this circuit.
Pulmonary
Where you find the SA node in the heart
Right Atrium
The cardiac cycle phase depicted here is called _____________
Isovolumetric Ventricular Diastole
The cardiac cycle depicts pressure changes on this side of the heart
Left
M is for move. The action potential travels here next after leaving the SA node
Atrial muscle
This valve is found at the top of the left ventricle where blood leaves the heart
Aortic
Two contractile myocardial cells pass action potentials through these structures
Gap junctions (2 connexons)
During atrial systole, the pressure in the atria is _____ than the pressure in the ventricle
Higher
Blood pressure in the systemic arteries must be _______ (higher or lower) than blood pressure in systemic capillaries
Higher
R is for return. Blood returns to the right atrium by this vessel
Vena cava
This is the equation for your maximum heart rate.
220 - age in years
Blood flows into the right atrium from the head and neck through this vessel.
Superior Vena Cava
This valve is open during late ventricular diastole
AV (atrioventricular) valve
When ventricular pressure is at its highest, the aortic valve is ________
Open
D is for diastole. This ECG event must occur to trigger ventricular diastole
T Wave
The permeability of this/these ion(s) increases when norepinephrine binds receptors on the SA node
Ca2+ and Na+
Heart cells are joined together by these structures
Intercalated disks
Phase of the cardiac cycle where the volume of blood is decreasing
Ventricular systole
This phase starts when ventricular pressure is greater than aortic pressure
Ventricular Systole
S is for sympathetic. The SNS does this to the slope of the pacemaker potential
Increases (steeper)