IMG_0024 - wave passes through ) walls experience higher P...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
b" Blood viscosity Yiscosity is the thickness of the fluid. If viscosity increases (molecules slide past one another less easily) ) R increases ) P increases to move the fluid along. The viscosity is directly afficted by: 1. Hematocrrt:Yo ofRBC in the total blood volume. Increases if more RBC or less plasma Decreases if fewer RBC or more plasma 2. Amount of fluid: removing fluid increases the viscosity c. Total vessel length If there is an increases amount of fatty tissue ) requires more vessels to serve it F total vessel length increases F greater R ) greater P Yessel Elasticity Healthy arteries with systole expand and recoil with diastole ) continuous Q Arteriosclerosis - arteries calcified and rigid F can not expand when the systolic
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: wave passes through ) walls experience higher P ) walls weaken Blood Yolume Excessive salt intake ) water retention ) blood volume increases ) more fluid presses against the walls ) walls experience greater P (compensatory mechanisms return this situation to normal) Excessive sweating ) blood volume decreases ) P against the walls decreases (but only short term because there are homeostatic mechanisms to compensate) Cardiac Output If CO decreases ) P decreases because less P on walls If CO increases F P increases because more P on walls Anything which affects HR or SV will affect the CO (recall: CO : HR x SV). and the CO in turn, affects the BF g7...
View Full Document

Ask a homework question - tutors are online