A) large veins B) venules C) arterioles D) small veins E) precapillary sphincters 31) Veins are much more easily distended under pressure than are arteries ________. A) because their walls are thinner and contain a lower proportion of smooth muscle fibers B) because of vasoconstriction C) because their walls are thicker, and veins contain a greater proportion of elastic fibers and collagen D) only in a few specialized cases E) because the lumen of veins is much smaller than the lumen of arteries of similar diameter 32) The first paired branches of the abdominal aorta are the ________. A) inferior phrenic arteries B) superior mesenteric arteries C) gonadal arteries D) renal arteries E) common iliac arteries 33) The azygous and hemiazygous veins are the chief collecting veins of the ________. A) head and neck B) pelvis C) upper limbs D) lower limbs E) Thoracic wall 34) In fetal circulation, blood may bypass the pulmonary circuit by passing from the pulmonary trunk to the aorta through the short muscular vessel known as the ________. A) fossa ovale B) ligamentum arteriosum C) ductus venosus D) ductus arteriosus E) umbilical arteries 35) Components of the lymphatic system include the:
A) large veins B) venules C) arterioles D) small veins E) precapillary sphincters 31) Veins are much more easily distended under pressure than are arteries ________. A) because their walls are thinner and contain a lower proportion of smooth muscle fibers B) because of vasoconstriction C) because their walls are thicker, and veins contain a greater proportion of elastic fibers and collagen D) only in a few specialized cases E) because the lumen of veins is much smaller than the lumen of arteries of similar diameter 32) The first paired branches of the abdominal aorta are the ________. A) inferior phrenic arteries B) superior mesenteric arteries C) gonadal arteries D) renal arteries E) common iliac arteries 33) The azygous and hemiazygous veins are the chief collecting veins of the ________. A) head and neck B) pelvis C) upper limbs D) lower limbs E) Thoracic wall 34) In fetal circulation, blood may bypass the pulmonary circuit by passing from the pulmonary trunk to the aorta through the short muscular vessel known as the ________. A) fossa ovale B) ligamentum arteriosum C) ductus venosus D) ductus arteriosus E) umbilical arteries 35) Components of the lymphatic system include the:
Final_exam_mock_BY115-WL.docx