Heart valves

Question 1

what are the two atrio - ventricular valves called?

Answer 1

tricuspid valve

bicuspid valve

Question 2

what is the av valve on the right side of the heart called?

Answer 2

tricuspid valve

Question 3

what is the av valve on the left side of the heart called?

Answer 3

bicuspid valve

Question 4

what is the role of valves?

Answer 4

• ensures blood flows in one direction through the heart as they only open in one direction
• prevents backflow of blood

Question 5

why are valves able to open and close?

Answer 5

due to pressure differences on either side of the valve

Question 6

where are av valves located?

Answer 6

between atria and ventricles

Question 7

what do av valves do?

Answer 7

prevent backflow of blood from ventricles to atria during ventricular systole

Question 8

describe the pressure when av valves are open

Answer 8

greater pressure in atria than ventricles

Question 9

describe the pressure when av valves are closed

Answer 9

greater pressure in ventricles than atria

Question 10

where are semi - lunar valves located?

Answer 10

base of arteries leaving the heartw

Question 11

what do semi - lunar valves do?

Answer 11

prevent blood from returning to the ventricle during diastole (resting heart)

Question 12

describe the pressure when semi - lunar valves are open?

Answer 12

greater pressure in ventricles than arteries

Question 13

describe the pressure when semi - lunar valves are closed?

Answer 13

greater pressure in arteries than ventricles