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Phys Exam 2: Ch 16 Test

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1.
Describe the structure of a capillary
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2.
What are the forces driving lymph flow
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3.
How do water soluble materials diffuse?
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4.
Describe interstitial fluid
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5.
How do you calculate net filtration pressure?
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6.
Where does the right thoracic duct join?
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7.
What is the net filtration force at the ARTERIAL end of the capillary? Does this value indicate net fluid into or out of the capillary?
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8.
What is a precapillary sphincter?
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9.
What is the value of interstitial fluid hydrostatic pressure in loose subQ tissue?
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10.
TRUE or FALSE: Individual epithelial cells have no intercellular clefts
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11.
Discuss the valves of the lymphatic capillaries
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12.
What is the fxn of the plasmalemma in regards to material transport?
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13.
What are the cellular extensions into the main lymphatic channel called?
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14.
What is the value of capillary hydrostatic pressure when indirectly measured?
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15.
What determines the osmotic pressures of a capillary?
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16.
What are vesicular channels?
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17.
What is interstitial fluid osmotic pressure? What is the normal value
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18.
Describe Plasma Colloid Osmotic Pressure
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19.
TRUE or FALSE: "True" capillaries have no smooth muscle
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20.
What sorts of nutrients can diffuse directly thru a cell membrane?
A.
TRUE
B.
FALSE: ECs are separated by intercellular cleft, thru which fluid & small dissolved molecules can flow
C.
Primarily by protein concentrations
D.
The right lymphatic duct joins the right subclavian vein near the jxn w/the right internal jugular vein
E.
Smooth muscle cells on the walls of each lymphatic capillary contract when stretched. Contraction of adjacent skeletal muscles, pulsation of adjacent arteries, and external compression of body tissue all compress the lymphatic capillaries.
F.
Valves of the lymphatic capillary
G.
Lipid-soluble materials (O2, CO2)
H.
At each EC overlap, the inside cell is anchored farther from its end, creating 1-way flaps available when interstitial pressure increases.
I.
The wall is a single layer of ECs w/a basement membrane on the outside; there are prominent intercellular clefts
J.
A smooth muscle cell around the beginning of a capillary
K.
Plasmalemmal vesicles can "ferry" specific material thru the cell
L.
-2 to -3 mmHg
M.
Diffuse only thru intercellular clefts ("pores"); H2O can fit easily, serum albumin can barely fit
N.
By an isogravimetric method - ~17mmHg
O.
NFP = Capillary pressure - Interstitial fluid pressure - Plasma colloid pressure + interstitial fluid colloid osmotic pressure
P.
Plasma osmotic pressure (Pip) depends upon the protein concentration (colloid): most solutes pass thru the capillary wall, but plasma proteins normally do not.
Q.
Rare combinations of vesicles
R.
Some protein does leak from the plasma; Net interstitial fluid (Pi-if) = 8mmHg
S.
Bundles of collagen fibers and proteoglycan filaments form a gel w/the plasma water, slowing bulk flow, but not small nutrient diffusion
T.
Outward forces = 41mmHg; Inward forces = 28mmHg; NET forces = 13mmHg; NET is OUTWARD
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21.
What force moves plasma out of the capillaries?
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22.
What happens when there is a lot of intercellular water flow?
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23.
What is the space b/n the flat ECs?
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24.
What is the value of interstitial fluid hydrostatic pressure in the epidural space?
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25.
What force moves plasma back into the venules?
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26.
What is the value of interstitial fluid hydrostatic pressure in synovial spaces of joints?
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27.
When smooth muscle cells on the walls of lymphatic capillaries contract, about how high can the pressure in the large thoracic duct reach?
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28.
What is the value of interstitial fluid hydrostatic pressure in the intrapleural space?
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29.
Intermittent contraction of the precapillary sphincters
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30.
Fluid in the spaces b/n the cells

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