BSNC 1000 – PERFUSION STUDY QUESTIONS AND CORRECT ANSWERS
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Course
BSNC 1000
Institution
BSNC 1000
Radius Biggest affect on blood flow through a vessel
Activation of Sympathetic NS - Decreases vessel diameter - Increases CO - Increases TPR
Perfusion The supply of oxygen to and removal of wastes from the cells and tissues of the body as a result of the flow of blood through the capillaries.
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BSNC 1000 – PERFUSION STUDY
QUESTIONS AND CORRECT ANSWERS
Radius ✅Biggest affect on blood flow through a vessel
Activation of Sympathetic NS ✅- Decreases vessel diameter
- Increases CO
- Increases TPR
Perfusion ✅The supply of oxygen to and removal of wastes from the cells and tissues
of the body as a result of the flow of blood through the capillaries.
Arterial System ✅Distributes blood and regulates pressure
Capillary beds ✅Transfer of materials between circulation and tissues
Venous System ✅Returns blood to heart volume reservoir
Scope of Perfusion ✅Optimal - Impaired - No Perfusion
Ischemia (cell injury) ✅Impaired perfusion
Infarction (cell death) ✅No Perfusion
Blood Pressure ✅Force of blood against the walls of blood vessels
Systolic Pressure ✅BP during systole
- ventricles contract
Diastolic Pressure ✅BP during diastole
- ventricles relax
Peripheral Resistance ✅Force that must be overcome to push blood through the
circulatory system
Blood Viscosity Decreases Because: ✅- Anemia: Load that the heart works against is
lower so TPR decreases
- Hypoproteinemia: Plasma proteins go down so blood is thinner so TPR decreases
What influences blood flow? ✅- Viscosity of blood (Increase = decrease in flow)
- Velocity of blood
- Vessel Radius
- Vessel Elasticity
What influences Viscocity? ✅- RBCs
- Hydration
- Proteins
What is the vessel radius mostly controlled by? ✅Sympathetic NS
What controls do the regulation of BP and flow involve? ✅- Local
- Neural
- Hormonal
RAAS ✅Renin-Angiotensin-Aldosterone-System
Neurological Control ✅- BP rises
- Arteries stretched
- Baroreceptors increase firing rate
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