Question

Which statement is TRUE? "A" labels the systemic circuit. A "B" labels the pulmonary circuit "A" labels the circuit that transports O2 rich blood to the pulmonary capillaries The right ventricle needs to contract more forcefully than the left ventricle none of these is true Mark "a" if TRUE, "b" if FALSE Assume that the blood vessels illustrated are in a WORKING muscle. Vessel "A" has more smooth muscle elastic fibers than vessel "B." Vessel "A" has lower blood pressure than Vessel "B." CO2 exits vessel, D "D." Structure "C" is constricted (see assumption above). B

Answer 1

ANSWER :

1. The letter "A" labels the pulmonary circuit of the blood in the lungs and letter "B"labels the systemic circuit of the body. The pulmonary circuit receives the deoxygenated blood from the right ventricle and send oxygenated blood to the left atrium of the heart. The left ventricle contracts more forcefully than any atrium of of the heart. Hence none of these option is correct.

2.a) The blood vessel labels with letter "A" is an artery and has more elastic smooth muscle fibres. Hence statement is true.

2.b) The blood vessel "A" has higher blood pressure than vessel "B" due to less lumen diameter of blood vessel "A". Hence related statement is false.

2.c) The blood vessels represents via letter "D" are capillaries, that have very thin epithelial layer hence able to transport CO2 and O2 gases through them. So, the option is true.

2.d) The structure "D" is the arteriole made by the constriction of blood capillaries.