A&P 2 exam review- question please relief........?

1. Arterial expansion and recoil can be:
a. felt as pulse
b. used to return more blood to the cisterna chyli
c. directly responsible for Starling's law

2. At any given time most of your blood is found within:
a. interstitail fluid
b. veins
c. heart
d. capillary beds

3. If the radius of a blood vessel is doubled, the peripheral resistance of the vessel:
a. also doubles
b. is four times as much
c. is 1/16 as much
d. is cut by a factor of 100

4. Across the body, the steepest devolution in blood pressure occurs in:
a. the venules
b. the lymphatics
c. the arterioles
d. the vein
thanks
Answers:
1) a --> b is wrong b/c that is the lymph system draining into the veins. I cogitate c is wrong b/c starling's law is really only applicable in the heart as an force for contraction

2) b. veins

3) c. does not vary in a 1:1 ratio... fairly in a r^4; therefore, doubling the radius would cut the resistance by 2^4-->1/16

4) c. venules, veins, and lymphatics do not enjoy any significant pressure changes ever... therefore arterioles is the answer.

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