difference in blood pressure
valves open in response to ________ on their two sides
a. right ventricle --- pulmonary trunk
b. left ventricle --- semilunar aorta
c. left atrium --- left ventricle
d. right atrium --- right ventricle
list the chambers/vessels that the 4 valves connect:
a. pulmonary semilunar
b. aortic semilunar
c. mitral
d. tricuspid
mid to late; diastole
ventricular filling occurs during _____ ventricular _____
AV (atrioventricular)
blood flows through the ____ valves into the ventricles
intraventricular pressure is greater than atrial pressure
during ventricular systole, what CLOSES the AV valves?
intraventricular pressure is greater than pressure in the pulmonary trunk and aorta
during ventricular systole, what OPENS the semilunar valves?
bloodflow back toward the heart- due to aortic pressure being greater than intraventricular pressure
during isovolumetric relaxation, what CLOSES the semilunar vavles?
atrial pressure is greater than intraventricular pressure
during isovolumetric relaxation, what OPENS the AV valves?
with hypertension, the ventricular pressure must rise higher to open the semilunar valves. for the same increase in pressure in a normotensive person, less blood is ejected in a hypertensive person. thus, the heart of someone with hypertension must work h
why is hypertension hard on the heart?
70
looking at the ventricular volume graph, the stroke volume is approximately how many ml?
a. AV valve- open; Semilunar valve- closed
b. AV valve- closed; Semilunar valve- closed
c. AV valve- closed; Semilunar valve- open
d. AV valve- closed; Semilunar valve- closed
during the 4 phases listed below, state whether the AV and semilunar valves are open or closed:
a. ventricular filling
b. isovolumetric contraction
c. ventricular ejection
d. isovolumetric relaxation