Test 2 - cardiac cycle

Question 1

enables mixed systemic venous blood to become “refreshed” via alveolar gas exchange within the lungs

Answer 1

pulmonary circulation

Question 2

distributes blood from the lungs to the tissues, and then returns “spent” blood back to the lungs

Answer 2

systemic circulation

Question 3

systemic: distribute oxygenated blood from L ventricle to the tissues

pulmonary: distribute mixed systemic venous blood from the R venticle to the lungs

Answer 3

arteries

Question 4

systemic: systemic perfusion to enable gas and nutrient exchange with the tissues

pulmonary: alveolar perfusion to enable O2 and CO2 exchange with alveolar gas

Answer 4

microcirculation (arterioles and capillaries)

Question 5

systemic: return O2 depleted, CO2 laden blood from the tissues to the R ventricle

pulmonary: return oxygenated blood from the lungs to the L ventricle

Answer 5

veins

Question 6

R heart vs L heart

Answer 6

Question 7

___ heart connects system veins to the pulmonary arteries

___ heart connects pulmonary veins to the systemic arteries

Answer 7

R heart

L heart

Question 8

the cardiac valves open and close in response to the time-varying changes in _______ pressure, relative to the blood pressure within the atrium, and arteries

Answer 8

ventricular

Question 9

systole: myocardium is _____

Answer 9

contracting

ventricular pressure rises“sharply” and remains elevated

ventricular volume decreases as blood is pumped from the ventricle into arteries

Question 10

during systole:

AV valves -

AP valves -

Answer 10

AV - open

AP - close

Question 11

distole: myocardium is _____

Answer 11

relaxing

ventricular pressure falls rapidly and remains low

ventricular volume increases and blood fills into the ventricle from central veins

Question 12

diastole:

AV valves -

AP valves -

Answer 12

AV - open

AP - close

Question 13

definition of cardiac cycle

causation of cardiac cycle

Answer 13

def: time varying changes in ventricular pressure and volume
caused: alternating cycle of myocardial contraction (systole) and relaxation (diastole)

Question 14

QRS: start of

T wave: end of

Answer 14

QRS: ventricular myocardial contraction

T: ventricular myocardial contraction