Chapter 15 Blood Flow, Part 2

Chapter 15 Blood Flow, Part 2 - Keypoints 1. Blood pressure...

Info iconThis preview shows pages 1–8. Sign up to view the full content.

View Full Document Right Arrow Icon
1. Blood pressure (BP) and Regulation 2. Exchange at capillaries 3. Lymphatic system 4. Cardio-vascular diseases Keypoints
Background image of page 1

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

View Full DocumentRight Arrow Icon
Review: R = R = π π r r 4 8 8 L L η η R = Resistance L = Length of “pipe” η = = viscosity r = radius
Background image of page 2
Control of Blood Flow 1. Local control: By paracrines O 2 CO 2 NO (in erection) In the heart, adenosine serves as a paracrine to dilate coronary arteries Others: histamine, ↓ O 2 and ↑ CO 2 arteriolar dilation The ↑ flow is hyperemia
Background image of page 3

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

View Full DocumentRight Arrow Icon
Control of blood flow, cont’d 2. Endocrine: ANP and Angiotensin II (Chapt 20) 3. ANS (mostly sympathetic): NE on α receptors vasoconstriction E on β 2 receptors vasodilation (F or F)
Background image of page 4
Distribution of Blood
Background image of page 5

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

View Full DocumentRight Arrow Icon
Exchange at the Capillaries Capillaries are anatomically designed for exchange Capillaries are anatomically designed for exchange Continuous Continuous (leaky junctions) (leaky junctions) Fenestrated Fenestrated (kidney and intestine) (kidney and intestine) Sinusoids Sinusoids in liver, bone marrow and kidney in liver, bone marrow and kidney Capillaries in the brain are less leaky and are surrounded by Capillaries in the brain are less leaky and are surrounded by astrocytes and pericytes astrocytes and pericytes BBB BBB Fig 15-16
Background image of page 6
Exchange at the Capillaries Capillary blood flow: Greatest total Capillary blood flow: Greatest total cross sectional area
Background image of page 7

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

View Full DocumentRight Arrow Icon
Image of page 8
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 12/24/2011 for the course STEP 1 taught by Professor Dr.aslam during the Fall '11 term at Montgomery College.

Page1 / 21

Chapter 15 Blood Flow, Part 2 - Keypoints 1. Blood pressure...

This preview shows document pages 1 - 8. Sign up to view the full document.

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