11) Identify the letter that indicates the vessel that is easy to find in most people and is used to obtain blood.
A) A
B) B
C) C
D) D
E) E
12) Identify the letter that indicates the longest vein in the body.
A) A
B) B
C) C
D) D
E) E
13) Identify the letter that indicates the vessel that arises from the union of the left and right brachiocephalic veins.
A) A
B) B
C) C
D) D
E) E
14) Identify the letter that indicates the cephalic vein.
A) A
B) B
C) C
D) D
E) E
15) Identify the letter that indicates the internal jugular vein.
A) A
B) B
C) C
D) D
E) E
16) Layer of blood vessels innervated by sympathetic vasomotor fibers.
A) tunica intima
B) subendothelial layer
C) tunica media
D) tunica externa
E) vasa vasorum
17) Capillaries consist of only this layer.
A) tunica intima
B) subendothelial layer
C) tunica media
D) tunica externa
E) vasa vasorum
18) Structure that regulates blood flow into true capillaries.
A) metarteriole
B) thoroughfare channel
C) precapillary sphincter
D) sinusoids
E) fenestrations
19) Wide leaky capillaries found in bone marrow and spleen.
A) sinusoids
B) fenestrated capillaries
C) continuous capillaries
D) metarterioles
E) none of the above
20) A "coming together" of alternate pathways of blood vessels.
A) thoroughfare channel
B) vasa vasorum
C) metarterioles
D) vascular anastomosis
E) converging veins