Cardiac cycle Flashcards
1
Q
One cardiac cycle consists of
A
contraction (systole) and
relaxation (diastole) of both atria, rapidly followed by the
systole and diastole of both ventricless
2
Q
contraction
A
systole
3
Q
relaxation
A
(diastole)
4
Q
Cardiac output (CO) =
A
volume of blood ejected from the left or right
ventricle into the aorta or pulmonary trunk each
minute
5
Q
Stroke volume (SV)
A
e amount of blood pumped out
of the ventricle in one beat
6
Q
CO (mL/min) =
A
SV (mL/beat) × HR (beats/min)
7
Q
Regulation of heart rate
A
Autonomic nervous system
* Hormones
* Ions
* Age
* Gender
* Physical fitness
* Temperature
8
Q
Regular aerobic exercise can
A
- Increase cardiac output
- Increase HDL
- Decrease triglycerides
- Improve lung function
- Decrease blood pressure
- Assist in weight control
