1. Poiseuille's Law is used to determine flow via various lengths, widths and pressure gradients. Flow is ultimately dependent on radius and pressure gradient because viscosity and length relatively remain constant. Small changesi n radius lead to drastic changes in resistance.
2. Parallel Circulation. Vasoconstriction serves to shunt blood flow to other areas with much less significant effects on pressure. The total resistance is inversely proportional.
3. Series Circulation. Vasoconstriction increases back pressure and decreases downstream flow and pressure.
Cannot say 100% but i would imagine so, cancers would trigger an immune response and immune cells travel though the blood stream
The answer is <span>atrial depolarization. good luck bro</span>
<span>the diaphragm
It sits right below the lungs and makes the air flow as it contracts :) </span>
