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Full Member
Jul 9, 2011
Status (Visible)
  1. Medical Student
Releasing adrenaline dilates blood vessels, making it easier for blood to flow. By about what percentage would the diameter of a blood vessel need to increase to raise blood flow by 20%, at constant Blood pressure?

1.) 0%
b.) 4.7%
c.) 10%
d.) 20%

I originally tried to solve this problem using
Because nearly all of the previous passages treated blood as an ideal fluid.
But they want us to treat blood as a non-ideal fluid here and use Q=r^4 relationship.

I'm wondering why we assume that blood here is a non-ideal fluid? Is that just a general rule to assume Everything is non-ideal viscous unless we are told otherwise?
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