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BSNC 1000 – PERFUSION EXAM LATEST VERSION $11.49   Add to cart

Exam (elaborations)

BSNC 1000 – PERFUSION EXAM LATEST VERSION

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BSNC 1000 – PERFUSION EXAM LATEST VERSION....

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  • October 11, 2024
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  • BSNC 1000 – PERFUSION
  • BSNC 1000 – PERFUSION
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BSNC 1000 – PERFUSION EXAM
LATEST VERSION


Radius - Answer The biggest impact on blood flow through a vessel

Sympathetic nervous system activation decreases vessel diameter.

- Increases CO.

- Increases TPR.


Perfusion - Answer The flow of blood via the capillaries provides oxygen to the
body's cells and tissues while also removing wastes from them.


Arterial System - Answer circulates blood and maintains pressure.


Capillary beds: ANSWER Transfer of materials between the circulation and
tissues


Venous System - ANSWER Returns blood to the heart volume storage.


Scope of Perfusion - ANSWER: Optimal, impaired, or no perfusion.


Ischemia (cell injury): Impaired perfusion.


Infarction (cell death) - Answer: N
o Perfusion

,Blood Pressure - ANSWER Blood pressure on blood vessel walls


Systolic Pressure - Answer BP during systole.

The ventricles constrict.


Diastolic Pressure: ANSWER BP during diastole

- The ventricles relax.


Pulse Pressure - Answer: Systole - Diastole (normal = 40-45 mmHg).


MAP = - ANSWER CO X TPR


MAP = diastolic pressure minus 1/3 (partial pressure).


Blood volume is influenced by: - ANSWER - salt intake and excretion.

-renin/aldosterone


Vasoconstriction Influenced by: - ANSWER - AUTONOMIC NS

- Kidney renin-angiotensin

- Adrenal medulla hormones.


Cardiac output Influenced by: ANSWER - BPM.

, The volume of blood


Peripheral resistance is influenced by: - Vasoconstriction.

- Vasodilation.

- Local Factors (pH and hypoxia)

- Sympathetic activation of smooth muscle on vessel walls.

- Blood viscosity.

- Vessel's radius


Vasodilation Influenced by: - ANSWER - AUTONOMIC NS

- Kidney: Vasodilators

- Hormonal factors


Peripheral resistance is the force that must be overcome to drive blood through
the circulatory system.


Blood Viscosity lowers Because: - ANSWER - Anemia: The load that the heart
works against is reduced, hence TPR lowers.

- Hypoproteinemia: Plasma proteins decrease, making the blood thinner and
decreasing TPR.


What affects blood flow? - ANSWER: Viscosity of blood (increase equals
reduction in flow)

- The velocity of blood

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