schrage circ 314

schrage circ 314 - increases as the arteries narrow But...

Info iconThis preview shows pages 1–16. Sign up to view the full content.

View Full Document Right Arrow Icon
Blood Plasma Proteins, salts, glucose, FA Red blood cells hemoglobin 15 g/dl Other cells WBC Neutrophils Macrophages Platelets Hematocrit Vol RBC/total Vol 35-45%
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Model of the circulatory system Right & left pumps in series
Background image of page 2
Vessel Composition
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Capillaries
Background image of page 4
Blood vessels - anatomy General arrangement structure
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Arteries High pressure High resistance Delivery and distribution network Relatively stiff VSM, connective tissue
Background image of page 6
Veins Low pressure side Very compliant Thin walled Little VSM 1-way valves
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Vessel Characteristics
Background image of page 8
Flow x Δ Pressure = Resistance MAP = CO x TPR
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Resistance & Flow
Background image of page 10
The outcome is that velocity
Background image of page 11

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 12
Background image of page 13

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 14
Background image of page 15

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 16
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: increases as the arteries narrow But since velocity is determined by the total cross sectional area of the vessels the velocity is dramatically slowed across the capillary bed. Where do signals act? Endothelium (EC) Vascular smooth muscle (VSM) Calcium is the key second messenger for most signals If VSM Ca 2+ increases, you get constriction If EC Ca 2+ increases, you get vasodilation Systemic blood pressure One way valves and compression of the veins by active muscle combine to act as a pump to assist venous return. Vessel Characteristics BF Distribution with Exercise BF must shunt from inactive to active tissue to meet metabolic requirements...
View Full Document

Page1 / 16

schrage circ 314 - increases as the arteries narrow But...

This preview shows document pages 1 - 16. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online