5 Questions
What is the primary factor affecting the resistance in arterioles?
Radius
A 20% decrease in radius results in what change in resistance?
50% increase
What is the most significant factor in determining the effect of viscosity on blood flow?
Hematocrit value
If the radius of an arteriole is increased by 20%, what is the expected change in flow?
50% increase
What is the formula for the velocity of blood flow, according to the provided equations?
F = π A P / 4 L
Study Notes
Blood Flow Regulation
- The formula for blood flow (F) is π × A × P / 4 × 8 × η × L, where F is blood flow, A is cross-sectional area, P is pressure, η is blood viscosity, and L is length of the blood vessel.
- The formula for blood flow (F) can also be represented as AP × 4 / LD, where LD is the laminar flow dimension.
Effect of Radius on Blood Flow
- The radius of arterioles has a significant impact on blood flow, with a 20% increase in radius leading to a 50% decrease in resistance and a doubling of flow.
- The radius of arterioles is the most important factor in regulating blood flow resistance.
Effect of Viscosity on Blood Flow
- The effect of viscosity on blood flow depends mainly on the hematocrit value, which is the proportion of red blood cells in the blood.
- Viscosity is a key factor in determining blood flow, and changes in viscosity can impact blood flow rates.
Learn about the factors that affect blood flow and resistance, including the impact of radius on arterioles and the role of viscosity in blood flow. Understand how hematocrit value influences viscosity and its effects on the body.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
