BRIGHTSTARS EXAM STUDY SOLUTIONS 8/15/2024 2:05 PM
BSNC 1000 - PERFUSION
Radius - answer✔✔Biggest affect on blood flow through a vessel
Activation of Sympathetic NS - answer✔✔- Decreases vessel diameter
- Increases CO
- Increases TPR
Perfusion - answer✔✔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 - answer✔✔Distributes blood and regulates pressure
Capillary beds - answer✔✔Transfer of materials between circulation and tissues
Venous System - answer✔✔Returns blood to heart volume reservoir
Scope of Perfusion - answer✔✔Optimal - Impaired - No Perfusion
Ischemia (cell injury) - answer✔✔Impaired perfusion
Infarction (cell death) - answer✔✔No Perfusion
Blood Pressure - answer✔✔Force of blood against the walls of blood vessels
Systolic Pressure - answer✔✔BP during systole
- ventricles contract
Diastolic Pressure - answer✔✔BP during diastole
- ventricles relax
Pulse Pressure - answer✔✔Systole - Diastole (normal = 40-45 mmHg)
MAP = - answer✔✔CO x TPR
MAP ≈ - answer✔✔Diastolic Pressure - 1/3(Partial Pressure)
Blood Volume Influenced By: - answer✔✔-sodium ingestion and excretion
, BRIGHTSTARS EXAM STUDY SOLUTIONS 8/15/2024 2:05 PM
-renin/aldosterone
Vasoconstriction Influenced By: - answer✔✔- Autonomic NS
- Kidney renin/angiotensin
- Adrenal medulla hormones
Cardiac Output Influenced By: - answer✔✔- BPM
- Volume of blood
Peripheral Resistance Influenced By: - answer✔✔- Vasoconstriction
- Vasodilation
- Local Factors (pH, hypoxia)
- Sympathetic stimulation of smooth muscle of vessel walls
- Blood viscosity
- Vessel radius
Vasodilation Influenced By: - answer✔✔- Autonomic NS
- Kidney: vasodilators
- Hormonal factors
Peripheral Resistance - answer✔✔Force that must be overcome to push blood through the
circulatory system
Blood Viscosity Decreases Because: - answer✔✔- 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? - answer✔✔- Viscosity of blood (Increase = decrease in flow)
- Velocity of blood
- Vessel Radius
- Vessel Elasticity
What influences Viscocity? - answer✔✔- RBCs
- Hydration
- Proteins
What is the vessel radius mostly controlled by? - answer✔✔Sympathetic NS
BSNC 1000 - PERFUSION
Radius - answer✔✔Biggest affect on blood flow through a vessel
Activation of Sympathetic NS - answer✔✔- Decreases vessel diameter
- Increases CO
- Increases TPR
Perfusion - answer✔✔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 - answer✔✔Distributes blood and regulates pressure
Capillary beds - answer✔✔Transfer of materials between circulation and tissues
Venous System - answer✔✔Returns blood to heart volume reservoir
Scope of Perfusion - answer✔✔Optimal - Impaired - No Perfusion
Ischemia (cell injury) - answer✔✔Impaired perfusion
Infarction (cell death) - answer✔✔No Perfusion
Blood Pressure - answer✔✔Force of blood against the walls of blood vessels
Systolic Pressure - answer✔✔BP during systole
- ventricles contract
Diastolic Pressure - answer✔✔BP during diastole
- ventricles relax
Pulse Pressure - answer✔✔Systole - Diastole (normal = 40-45 mmHg)
MAP = - answer✔✔CO x TPR
MAP ≈ - answer✔✔Diastolic Pressure - 1/3(Partial Pressure)
Blood Volume Influenced By: - answer✔✔-sodium ingestion and excretion
, BRIGHTSTARS EXAM STUDY SOLUTIONS 8/15/2024 2:05 PM
-renin/aldosterone
Vasoconstriction Influenced By: - answer✔✔- Autonomic NS
- Kidney renin/angiotensin
- Adrenal medulla hormones
Cardiac Output Influenced By: - answer✔✔- BPM
- Volume of blood
Peripheral Resistance Influenced By: - answer✔✔- Vasoconstriction
- Vasodilation
- Local Factors (pH, hypoxia)
- Sympathetic stimulation of smooth muscle of vessel walls
- Blood viscosity
- Vessel radius
Vasodilation Influenced By: - answer✔✔- Autonomic NS
- Kidney: vasodilators
- Hormonal factors
Peripheral Resistance - answer✔✔Force that must be overcome to push blood through the
circulatory system
Blood Viscosity Decreases Because: - answer✔✔- 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? - answer✔✔- Viscosity of blood (Increase = decrease in flow)
- Velocity of blood
- Vessel Radius
- Vessel Elasticity
What influences Viscocity? - answer✔✔- RBCs
- Hydration
- Proteins
What is the vessel radius mostly controlled by? - answer✔✔Sympathetic NS
