BSNC 1000 Module 4-6 Questions with Answers All Correct
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Course
BSNC 1000
Institution
BSNC 1000
BSNC 1000 Module 4-6 Questions with Answers All Correct
What is the suggested BMI? - Answer-18.5-24.9 kg/m2
What is gas exchange? - Answer-O2 diffuses into blood, CO2 diffuses out of blood
What is the most common cause of cell injury? and how do you define it? - Answer-hypoxia - low oxygen t...
BSNC 1000 Module 4-6 Questions
with Answers All Correct
What is the suggested BMI? - Answer-18.5-24.9 kg/m2
What is gas exchange? - Answer-O2 diffuses into blood, CO2 diffuses out of blood
What is the most common cause of cell injury? and how do you define it? - Answer-
hypoxia - low oxygen tension (amount) in tissues
What is hypoxemia? - Answer-low oxygen in the blood
What is anoxia? - Answer-absence of oxygen
What is ischemia? - Answer-insufficient flow of oxygenated blood to tissues
What is PaO2? - Answer-The amount of oxygen dissolved in the plasma
(partial pressure of oxygen)
measured in mm/Hg
normal value 80 mm/Hg
What is SaO2? - Answer-The amount of oxygen bound to hemoglobin
saturation
measured by %
normal range 97-99%
What is PaCO2? - Answer-partial pressure of CO2 in arterial blood
normal value 35-45 mm/Hg
What do central chemoreceptors respond to? - Answer-increase respiration when PCO2
increases or pH decreases
What do peripheral chemoreceptors respond to? - Answer-increase respiration when
PO2 <60mm/Hg
what are some disorders that may lead to gas exhange issues? - Answer--asthma
-pneumonia
-COPD
-emphysema
-chronic bronchitis
what is ventilation? - Answer-inhaling O2 and exhaling CO2
, when may impaired ventilation occur? - Answer--inadequate bone/muscle/nerve
function to move air into lungs
-narrowed airways from bronchoconstriction (asthma) or from obstruction (chronic
bronchitis)
-poor gas exchange in alveoli (pulmonary edema)
what is "transport"? - Answer-availability of hemoglobin and its availability to carry O2
from alveoli to cells and CO2 from cells to alveoli
what happens with impaired transport? - Answer-if there is insufficient # of erythrocytes
or hemoglobin available
what is perfusion (gas exchange) - Answer-ability of blood to transport O2 containing
hemoglobin to cells and return CO2 containing hemoglobin to alveoli
what are consequences of impaired gas exchange? - Answer--HR and RR increase in
attempt to increase O2 to cells
-decreased O2 at cellular level = decreased mitochondrial respiration and oxidative
metabolism
Define perfusion - Answer-blood flow and oxygen delivery to body tissues
Perfusion is influenced by - Answer--volume of blood pumped from the heart
-radius of blood vessels
-viscosity of blood
-velocity of flow
-blood pressure
impaired perfusion is exemplified by: - Answer--hypertension
-myocardial infarction
-heart failure
-shock
how do you measure pulse pressure? - Answer-systolic pressure - diastolic pressure
how do you measure BP? - Answer-CO x peripheral vascular resistance
how do you measure CO? - Answer-stroke volume x HR
how do you measure MAP? - Answer-CO x TPR
what major factors influence peripheral resistance - Answer--vessel radius ***
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