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BSNC 1000 – PERFUSION STUDY QUESTIONS AND CORRECT ANSWERS $8.99   Add to cart

Exam (elaborations)

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. Ar...

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  • August 27, 2024
  • 7
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • BSNC 1000
  • BSNC 1000
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twishfrancis
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

Pulse Pressure ✅Systole - Diastole (normal = 40-45 mmHg)

MAP = ✅CO x TPR

MAP ≈ ✅Diastolic Pressure - 1/3(Partial Pressure)

Blood Volume Influenced By: ✅-sodium ingestion and excretion
-renin/aldosterone

, Vasoconstriction Influenced By: ✅- Autonomic NS
- Kidney renin/angiotensin
- Adrenal medulla hormones

Cardiac Output Influenced By: ✅- BPM
- Volume of blood

Peripheral Resistance Influenced By: ✅- Vasoconstriction
- Vasodilation
- Local Factors (pH, hypoxia)
- Sympathetic stimulation of smooth muscle of vessel walls
- Blood viscosity
- Vessel radius

Vasodilation Influenced By: ✅- Autonomic NS
- Kidney: vasodilators
- Hormonal factors

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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