Choose the best answer.

1			Most blood from the brain flows down the internal jugular veins and then into the __________________
			A)	the external jugular veins.
			B)	the vertebral veins.
			C)	the subclavian veins.
			D)	the brachiocephalic veins.
2			The hepatic portal vein receives blood from all of the following EXCEPT the ___________________
			A)	the splenic vein.
			B)	the superior mesenteric vein.
			C)	the pancreatic vein.
			D)	the hepatic veins.
3			Which layer of the vessel wall facilitates vasoconstriction and vasodilation?
			A)	the tunica externa
			B)	the tunica adventitia
			C)	the tunica interna
			D)	the tunica media
4			Which of the following is associated with veins but not arteries?
			A)	a tunica media with abundant smooth muscle
			B)	continuous endothelium
			C)	a tunica media with abundant elastic fibers
			D)	valves
5			At any one moment most of the bodies blood volume is in the _______________________.
			A)	veins
			B)	arteries
			C)	heart
			D)	lungs
6			Which branch of the abdominal aorta supplies the distal end of the large intestine?
			A)	external iliac
			B)	celiac trunk
			C)	superior mesenteric a
			D)	inferior mesenteric a.
7			Who discovered the route of the blood vessels within the human body?
			A)	Galin
			B)	Huang Ti
			C)	Malpighi
			D)	Harvey
8			What are the vessels called that carry blood away from the heart?
			A)	veins
			B)	veinules
			C)	capillaries
			D)	arteries
9			What are the vessels called that are the functional unit of the circulatory system because all exchange takes place here?
			A)	arteries
			B)	veins
			C)	capillaries
			D)	heart
10			The tunica interna lines the inside of the vessels and is made of a simple squamous epithelium called the ________________________.
			A)	endothelium
			B)	epithelium
			C)	myometrium
			D)	basement membrane
11			These vessels contain large amounts of elastic tissue within the tunica media. What are they called?
			A)	arteries
			B)	arterioles
			C)	capillaries
			D)	veins
12			The widening of a vessel is called _______________.
			A)	vasomotion
			B)	vasomotor tone
			C)	vasodilation
			D)	vasoconstriction
13			What are the small blood vessels called that provide blood to the outer half of the tunica externa (adventitia) of larger arteries and veins?
			A)	vasa vasorum
			B)	vasa recta
			C)	capillaries
			D)	veinules
14			What are the vessels called that are major resistors in the circulatory system and contain smooth muscles within their walls?
			A)	arteries
			B)	arterioles
			C)	capillaries
			D)	veins
15			What are the vessels called that are thin-walled and expand easily?
			A)	arteries
			B)	arterioles
			C)	capillaries
			D)	veins
16			How many red blood cells normally fit across the diameter of a capillary?
			A)	1
			B)	10
			C)	100
			D)	1 million
17			Which is NOT a vessel coming from the arch of the aorta?
			A)	branchiocephalic trunk
			B)	left common carotid
			C)	left subclavian a.
			D)	right subclavian a.
18			What are the vessels called that connect the vertebral and carotid systems at the base of the brain?
			A)	anterior communicating aa.
			B)	basilar a.
			C)	posterior communicating aa.
			D)	posterior cerebral aa.
19			Which is NOT a vessel going to the upper limbs?
			A)	cephalic
			B)	brachial
			C)	subclavian
			D)	axillary
20			The connection of the radial a. with the ulnar a. is an example of a/n _______________.
			A)	communication
			B)	anastomoses
			C)	collateral circulation
			D)	All of the above are correct.
			E)	All of the above are NOT correct.
21			What is the vessel that divides into the common iliac aa?
			A)	arch of the aorta
			B)	superior vena cava
			C)	abdominal aorta
			D)	inferior vena cava
22			Which of the following is NOT an unpaired artery of the abdominal mesenteries?
			A)	inferior mesenteric a.
			B)	renal a.
			C)	superior mesenteric a.
			D)	celiac trunk
23			Which is NOT a branch of the celiac trunk?
			A)	renal a.
			B)	splenic a.
			C)	left gastric a.
			D)	common hepatic a.
24			The major artery of the thigh, is a continuation of the external iliac artery, called the ________________.
			A)	obturator a.
			B)	genicular a.
			C)	popliteal a.
			D)	femoral a.
25			The two veins that drain the superficial upper limb are the _______________ and __________________.
			A)	internal jugular - external jugular
			B)	common iliac - internal iliac
			C)	cephalic - basilic
			D)	great saphenous - small saphenous