O2/ Nutrient Lack Theory- A & P 2

Front 1

Name the metabolically active tissues/organs

Back 1

endocrine glands, kidney, active muscle and the brain

Front 2

what keeps cardiac workload to a minimum

Back 2

local blood flow control

Front 3

Acute local blood flow control occurs within seconds to minutes in response to ?

Back 3

increased tissue metabolism

Front 4

what vessels are affected in acute local blood flow control

Back 4

arterioles, metarterioles and pre capillary sphincters

Front 5

according to the O2/nutrient lack theory in the absence of adequate O2 and nutrients this happens

Back 5

vascular smooth muscle relaxes, vessels dilate and blood flow increases until the deficiency is corrected

Front 6

many physiologist believe this is the most important vasodialator, especially for myocardial blood vessels

Back 6

adenosine

Front 7

name some known endogenous vasodialators

Back 7

K+, H+ (in lactic acid) CO2, and Histamine along with adenosine

Front 8

when and where are endogenous vasodilator substances formed

Back 8

in tissue cells in response to hypoxia (increased tissue metabolism)

Front 9

what do the vasodilator do?

Back 9

these substances relax smooth muscle in arterioles, metarterioles, and pre capillary sphincters locally