structure and function of capillaries

Question 1

capillary beds (capillary plexus) connect

Answer 1

one arteriole and one venule

Question 2

function of precapillary sphincter

Answer 2

• Guards entrance to each capillary
  -opens and closes, causing capillary blood to flow in pulses

Question 3

Fenestrated capillaries have pores in

Answer 3

endothelial lining

Question 4

Fenestrated Capillaries permit exchange of

Answer 4

water and large solutes between plasma and interstitial fluid

Question 5

Fenestrated capillaries are found in

Answer 5

chorid plexus
endocrine organs
kindneys
intestnial tract

Question 6

Discontinuous capillaries are also called

Answer 6

sinusoidal capillaries

Question 7

discontinous capillaries have small holes in endothelia lining and either a

Answer 7

discontinous or non-existent basement membrane

Question 8

discontinuous capillaries allows blood and serum proteins to pass through walls like a

Answer 8

sieve

Question 9

discontinous capillaries are found in

Answer 9

bone marrow
liver
spleen

Question 10

Veins collect blood from

Answer 10

capillaries in tissues and organs

Question 11

veins have a larger____ and thinner_____than arteries

Answer 11

diameter
walls

Question 12

Veins have lower

Answer 12

blood pressure

Question 13

Venues are very____ that collect bood from______

Answer 13

veins
capillaries

Question 14

Medium-sized veins have thin_____and few_____muscle

Answer 14

tunica media
smooth muscle

Question 15

Tunica externa have longitudinal bundles of

Answer 15

elastic fibers

Question 16

Large veins have

Answer 16

all 3 tunica layers
Thick tunica externa
thin tunica media

Question 17

Venous valves have folds of ___that prevent

Answer 17

Folds of tunica intima
prevent blood from flowing backward
compression pushes blood to heart