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NU 503- Circulation Exam Questions and Answers |Study Guide $9.99   Add to cart

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NU 503- Circulation Exam Questions and Answers |Study Guide

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EMILLYCHARLOTTE 2024/2025 ACADEMIC YAER ©2024 EMILLYCHARLOTTE. ALL RIGHTS RESERVED FIRST PUBLISH SEPTEMBER 2024 Page 1/16 NU 503- Circulation Exam Questions and Answers |Study Guide Pulmonary Circulation - Answer-oxygenated blood to left atrium via pulmonary veins oxygenate blood and remove ...

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NU 503- Circulation Exam Questions and
Answers |Study Guide

Pulmonary Circulation - Answer✔✔-oxygenated blood to left atrium via pulmonary veins


oxygenate blood and remove carbon dioxide


pulmonary circulation origination - Answer✔✔-right ventricle via pulmonary artery


Systemic Circulation - Answer✔✔-starts with aorta receiving output from LV


Systemic circulation output with exercise - Answer✔✔-varies greatly to skin and skeletal muscles


Systemic vs pulmonary pressure - Answer✔✔-systemic 5-10x higher than pulmonary


Blood flow with heavy exercise - Answer✔✔-Significantly increase blood flow from 5 L/min to 25L/min


Decreases blood flow to all other organs but the heart (heart blood flow increases with exercise)


Blood vessel structure layers - Answer✔✔-1. tunica intima


2. tunica media


3. tunica externa


Tunica intima - Answer✔✔-vital to vascular health, single innermost layer of vessel and creates vessel

lining, basement membrane, and elastic fibers


Tunica media - Answer✔✔-middle vessel layer, concentric layers of vascular smooth muscle cells.

Surrounding smooth muscle is another layer of elastic fibers

Page 1/16

,EMILLYCHARLOTTE 2024/2025 ACADEMIC YAER ©2024 EMILLYCHARLOTTE. ALL RIGHTS RESERVED
FIRST PUBLISH SEPTEMBER 2024


Tunica externa - Answer✔✔-outermost layer: strong connective tissue that keeps vessels intact


Artery walls - Answer✔✔-much thicker for higher pressures, highest in aorta


Artery branching - Answer✔✔-Branch into smaller vessels (arterioles 80% SVR) extending from heart


Decrease in lumen diameter


Decrease in elastic fibers


Increase in relative amount of smooth muscle


Capillaries function - Answer✔✔-Exchange between blood and tissues


capillaries vasculature - Answer✔✔-thin walls of endothelial cells and basement membrane


capillary blood flow - Answer✔✔-collected into venules and larger veins


Law of LaPlace - Answer✔✔-biophysics of vascular wall tension


hydrostatic pressure: aorta - Answer✔✔-created by blood pumped into aorta


wall tension created by - Answer✔✔-hydrostatic pressure- push on vessel wall


Wall tension - Answer✔✔-contributor to rupturing of weakened vessel


what increases vascular wall tension? - Answer✔✔-blood pressure


radius of vessel


What decreases vascular wall tension? - Answer✔✔-increased wall thickness




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FIRST PUBLISH SEPTEMBER 2024


Vascular Aneurysm: Law of LaPlace - Answer✔✔-weakened vessel is dilates and radius increases and

increased wall tension, creates vessel enlargement over time, increasing risk of catastrophic rupture


Aneurysm risk factors - Answer✔✔-congenital, atherosclerosis, hypertension, diabetes, tobacco, age

>65, men


Law of laplace formula - Answer✔✔-T = (P x r) / h


T = (P x r) / h - Answer✔✔-T = tension of wall


P = pressure in vessel wall


r = radius of vessel


h = thickness of vessel


Laminar blood flow - Answer✔✔-type of blood flow not resulting in audible sound; defined by

streamline flow or flow in parallel layers without turbulence


laminar flow + high velocity - Answer✔✔-= shear stress which creates nitric oxide


Nitric Oxide - Answer✔✔-vasodilation, vessel patency, decreased BP


Turbulent flow - Answer✔✔-Irregular flow with random variations in pressure


increased risk at narrowed areas and branch points


Bruits - Answer✔✔-turbulent flow causes vibrations of vascular wall


auscultated


turbulent flow shear stress - Answer✔✔-sheer stress reduced = decreased nitric oxide production


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