Flow = Press ? x Radius4 / 8L * Viscosity
Where, Press ? = Pressure Gradient; Radius = radius of the pre-capillary vessels
that control blood flow distribution to tissue vascular beds; L = length of the
distance between any the two points of blood flow; and viscosity of the blood.

Using Poiseuille's Law, answer the following questions to describe what happens to
blood flow between the left side of the heart and contracting muscles and/or between
contracting muscles and the right side of the heart during the below described
exercise sessions.
1. An acute exercise session involving a large amount of statically contracting
muscles at a high muscle intensity :
1a. Blood flow between the left side of the heart and contracting muscles is
_____________.
1b. Your answer to 1a. is due to the _ in the Pressure Gradient
caused by the in the vascular pressure at the muscles vascular
bed from high levels of
1c. Blood flow between contracting muscles and the right side of the heart is
__ due to the removal of _ :

2. An acute session of aerobic exercise in which the individual experiences a
state of dehydration.:
2a. Identify the factor of Poiseuille's Law that is affected, 2b., what the effect is,
and 2c., what this effect has on blood flow:

2d. Under this condition, how can the CV system maintain adequate blood flow to
contracting muscles?

3. Identify one factor of Poiseuille's Law of blood flow that is expected to be
affected by chronic adaptations from a regular program of aerobic
conditioning:
3a. Describe the expected chronic adaptation for this factor:
3b. What is the effect of this adaptation to blood flow between the left heart and
contracting muscles during acute aerobic exercise at the same Pressure Gradient
?

pur-new-sol

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