Term
| Nam the two major mechanisms of BP control |
|
Definition
| Metabolic (metabolites and paracrine ) and myogenic (reflex and endothelial products) |
|
|
Term
|
Definition
Metabolite (CO2, H+, K+, adenosine)
Paracrine- Ang II, prostoglandins, histamine |
|
|
Term
|
Definition
Myogenic reflex- reflexively contract when stretched
Endothelial products (NO) |
|
|
Term
| What is the local control of blood flow? |
|
Definition
-Autoregulation
-Hyperemia- active and reactive
Both myogenic and metabolic |
|
|
Term
|
Definition
Ability of an ORGAN to maintain constant blood flow during arterial pressure change
-Heart, brain, kidney |
|
|
Term
| What is the blood pressure range for autoregulation of the brain? |
|
Definition
|
|
Term
| How is coronary blood flow regulated? |
|
Definition
-Autoregulation- keep blood flow regardless of pressure change
-Active hyperemia- very sensitive to low adenosine and O2
-Reactive hyperemia- compression during contraction
-Shear stress- NO cause vasodilation |
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|
