anatomy chapter 20 – Flashcards

all arteries carry oxygen-rich blood, whereas veins carry oxygen-poor blood true or false

layer of blood vessels innervated by sympathetic vasomotor fibers

the elastic arteries are the largest arteries newt the heart true or false

muscular arteries regulate blood flow to organs and groups of organs true of false

arterioles and venues have a vasa vastorum to provide nutrients to their outer wall, whereas the inner walls receive nutrients from blood in the lumen true or false

systemic blood pressure is regulated by adjusting the diameter of arterioles true or false

by definition, veins are

a blood vessel that ranges from 0.3 mm to about 1 cm in diameter and has a large tunica media relative to the size of the lumen is

functionally, there are no valves in arteries (as opposed to in veins) because

which layer of blood vessel contains smooth muscle tissue

what is distinctive about the tunica media of arteries when compared to the tunica media in veins

the external elastic lamina of muscular arteries forms ____and its function is____

the diameters of arterioles is regulated by

elastic arteries ___

in metabolically active tissues, blood is present in metarterious and pre capillary sphincters are constricted true or false

the diameter of a typical capillary is similar to that of

what prevents the back flow of blood in veins

fenestrated capillaries

in a capillary bed, relaxation of the pre capillary sphincters causes more blood to flow

blood pressure is highest in the

microvasculature that provides nourishment to the outer wall of the aorta

vessels of the small intestines, renal glomerulus, and synovial membranes that allow passage of fluid and solute through "windows" in the endothelium

pre capillary sphincters allow blood to leave this structure and enter true capillaries

structure that regulates blood flow into true capillaries

a "coming together" of alternate pathways of blood vessels

continuous capillaries ___

what is the function of valves in veins

which structure in the wall of continuous capillaries allows for the passage of molecules into and out of the vessel

where do arterial anastomeroses occur in the body

the internal iliac arteries supply blood bother to the pelvic organs and to the lower limbs true of false

the pulse of the posterior tibail artery is palpated behind the knee true or false

the main arteries of the sole of the foot-the medial and lateral plantar arteries-arise behind the ankles from which artery

which artery arises front he inferior part of the abdominal aorta and supplies the distal half of the large intestine

the correct proximal to distal sequence of the 3 vessels branching from the aortic arch is

the abdominal aorta divides at its distal end into which arteries

which branch of the abdominal aorta supplies to the stomach

if a physiccannot feel a pulse in the popliteal fossa the ___artery likely narrowed by arteriosclerosis

the dorsal is pedis artery is located by

the pulse of the facial artery is palpated

the saphenous vein is not paired with an artery with the same name true or false

the circulatory route that runs from the digestive tract to the liver is called

the right gonadal vein drains into the

the right suprarenal and gonadal veins drain into the inferior vena cava, whereas the left suprarenal and gonadal veins drain into the

most systemic venous blood is both oxygen-poor and nutrient-poor, however, systemic venous blood is not oxygen-poor and is nutrient-rich occurs in

which vessel is most commonly used to bypass a damaged coronary artery in coronary bypass surgery

the hepatic portal system has 2 distinct capillary beds separated by a portal vein. what are the function so these 2 capillary beds

an aneurysm is a

the foramen oval in the heart normally closes

what vessel in the fetus connects the pulmonary trunk to the aortic arch so that most of the blood bypass the immature ulnas

blood passing through the fetal ductus arterioles bypasses the

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 true or false