cardiovascular system

Question 1

pathway of deoxygenated blood

Answer 1

vena cave -> right atrium -> tricuspid valve -> right ventricle-> pulmonary valve -> pulmonary artery

Question 2

pathway of oxygenated blood

Answer 2

pulmonary vein -> left atrium -> bicuspid valve -> left ventricle -> aortic valve -> aorta

Question 3

cardiac conduction system

Answer 3

SA node -> atrial systole -> AV node -> bundle of his -> purkinje fibres -> ventricular systole

Question 4

chemoreceptors

Answer 4

increase in carbon dioxide -> increase in heart rate

Question 5

baroreceptors

Answer 5

increase blood pressure -> decreased heart rate

Question 6

proprioceptors

Answer 6

increase in muscle movement -> increase in heart rate

Question 7

starlings law

Answer 7

1- increased venous return 
2- greater diastolic filling of the heart 
3- cardiac muscle is stretched 
4- more force if contraction 
5- increase ejection fraction

Question 8

cardiac output (Q) =

Answer 8

stroke volume (SV) X heart rate (HR)

Question 9

ejection fraction=

Answer 9

stroke volume / end diastolic volume