20.2 True/False Questions
1) All types of blood vessels contain a tunica intima.
2) All arteries carry oxygen-rich blood, whereas veins carry oxygen-poor blood.
3) Systemic blood pressure is regulated by adjusting the diameter of arterioles.
4) In metabolically active tissues, blood is present in metarterioles, and precapillary sphincters are constricted.
5) Postcapillary venules function much like true capillaries.
6) The pulse of the posterior tibial artery is palpated behind the knee.
7) Veins have less elastin in their walls than do arteries.
8) Arterioles and venules have a vasa vasorum to provide nutrients to their outer walls, whereas the inner walls receive nutrients from blood in the lumen.
9) The middle and posterior cerebral arteries are connected by the posterior communicating arteries.
10) The internal iliac arteries supply blood both to the pelvic organs and to the lower limbs.
11) The inferior vena cava ascends on the left side of the vertebral bodies and to the left of the abdominal aorta.
12) Muscular arteries regulate blood flow to organs and groups of organs.
13) The elastic arteries are the largest arteries near the heart.
14) The saphenous vein is not paired with an artery with the same name.
15) Paired fetal umbilical veins carry blood from the fetus to the placenta, whereas the unpaired umbilical artery returns blood from the placenta to the fetus.