lab M2 L5

Question 1

layers of blood vessel wall from innermost to outermost

Answer 1

tunica intima
tunica media
tunica externa

Question 2

tunica intima composition

Answer 2

endothelium

basement membrane (thin and acellular)

internal elastic lamina

Question 3

tunica intima function

Answer 3

flattened endothelium regulates blood flow and permeability, provides slick surface

basement membrane anchors endothelium to underlying tissue

internal elastic laminate regulates movement of substances through tunica intima

Question 4

tunica media composition

Answer 4

smooth muscle

elastic fibers

Question 5

tunica media function

Answer 5

smooth muscle constricts to decrease vessel diameter

elastic fibers allow vessel wall to stretch and recoil in response to BP

Question 6

what layer separates the tunica media from the tunica externa?

Answer 6

external elastic lamina

Question 7

tunica externa composition

Answer 7

connective tissue with collagen and elastic fibers

Question 8

tunica externa function

Answer 8

anchors wall of vessel to surrounding tissues

Question 9

capillary composition

Answer 9

endothelium layer