Cardiac Cycle
Closure of the heart valves causes this sound.
What are S1 and S2 sounds?
The three most important sources of resistance...
What is blood viscosity, blood vessel length & blood vessel diameter?
Systolic - Diastolic = _______?
pulse pressure (should be 40 mmHg)
Short term control utilizes the ________ ________ & hormones
Nervous System
Where are the vasomotor and cardiac centers located?
medulla
This is the term for atrial or ventricular contraction.
What is systole?
This is the most significant source of resistance.
If CO goes up, then blood pressure goes ______
up
Long-term control takes place in this organ.
What are the kidneys?
What makes the S2 sound of the heart?
closure of the semilunar valves
The "pacemaker" of the heart
What is the SA node?
Longer blood vessel length _____ resistance.
increases
If TPR goes up then blood pressure goes
up
These receptors are found in the arterial walls of the neck and thorax, carotid and aorta)
What are baroreceptors?
How does vasoconstriction affect resistance?
increases it
The P Wave of an EKG represents ...
What is atrial depolarization?
Descreasing vessel diameter ________ resistance.
increases
Name the 3 main factors influencing blood pressure.
What is: blood volume, TPR (total peripheral resistance) & CO (cardiac output)?
This hormone is secreted by the heart and decreases blood volume.
What is aldosterone?
What is the source of blood carried to the capillaries in the myocardium?
coronary arteries
Atrial repolarization occurs during this phase in the EKG.
What is the QRS complex?
What is the relationship between TPR and vessel radius?
TPR varies inversely with r4
How is cardiac output (CO) calculate?
CO= Blood Pressure/R (or TPR)
The indirect method of long term blood pressure control relies on this hormone.
What is Angiotensin II?
What is the name of the opening in the inter-atrial septum which allows blood to flow from the right to the left atrium before birth?
foramen ovale