WVSOM -- Respiratory System under Stress
Help!
|
|
||||
|---|---|---|---|---|---|
| How does ventilation change with increased arterial Pco2? | Increased ventilation
🗑
|
||||
| Which chemoreceptors are mainly stimulated? | central chemoreceptors
🗑
|
||||
| How does ventilation change in hypoxia? | increased ventilation
🗑
|
||||
| Which chemoreceptors are mainly stimulated? | peripheral chemoreceptors
🗑
|
||||
| What happens to Inspired PO2 with increase in altitude? | drops
🗑
|
||||
| What happens as barometric pressure drops? | PIO2 drops
🗑
|
||||
| What is the barometric pressure at the top of Mt. Everest? | 43mmHg
🗑
|
||||
| Does PO2 drop with altitude? | no it is just less dense so only Inspired PO2 is decreased
🗑
|
||||
| What 4 things help us acclimate to high altitude? | hyperventilation, polycythemia, O2 dissociation curve and circulatory changes
🗑
|
||||
| How does Hyperventilation help with high altitudes? | There is an increase in Alveolar PO2 by decreasing the PAco2. You basically blow off more CO2
🗑
|
||||
| How does ventilation increase in two stages during alveolar hypoxia? | Arterial and CSF pH correction allows ventilation to increase further. Alkalosis then limits hyperventilation.
🗑
|
||||
| What are the effects of acute mountain sickness are attributable to hypoxemia and alkalosis? | headach, dizziness, palpations, fatuge, nausea, loss of appetite and insomnia
🗑
|
||||
| What is polyctyhemia? | increase in red blood cells
🗑
|
||||
| How does polycythemia help in high altitude? | helps normalize blood O2 content
🗑
|
||||
| How is polycythemia bad? | Increased viscosity
🗑
|
||||
| What happens to the O2 dissociation curve at high altitude? | Shifts left
🗑
|
||||
| What happens to the O2 disassociation curve at moderate altitude? | Curve shifts to the right so that it is more willing to release O2
🗑
|
||||
| What systemic changes happen at high altitude? | more capillary formation and mitochondrial enzyme expression to maintain the gradient
🗑
|
||||
| What happens to pulmonary circulation at high altitudes? | Hypoxic vasoconstriction which is not helpful. It happens all over the lung instead of localized
🗑
|
||||
| What happens with prolonged breathing of pure O2? | it is toxic. Person has convulsions, pulmonary edema and decreased vital capacity
🗑
|
||||
| Why can breathing pure oxygen be toxic? | It splints N2 and causes absorption atelectasis
🗑
|
||||
| What is absorption atelectasis? | Pure O2 will cause wash out all the N2 in your alveoli and blood and there will be a much longer partial pressure that will lead to airway collapse
🗑
|
||||
| How does Hyperbaric O2 useful in CO poisoning? | Increased barometric pressure with increased PIO2 will lead to an increased dissolved O2 in the blood
🗑
|
||||
| What does Nitrogen and sulfur oxides do to the lung? | causes inflammation
🗑
|
||||
| What does ozone do to the lung? | causes extra edema in the lung
🗑
|
||||
| What do hydrocarbons do to the lung? | carcinogenic
🗑
|
||||
| Why is CO bad? | it binds to hemoglobin so O2 can’t
🗑
|
||||
| Where do large particles deposit in the lung? | nasopharynx. They are removed by swallowing
🗑
|
||||
| Where does does sedimentation deposit in the respiratory system? | they are medium particles that deposit in small airways
🗑
|
||||
| Where do small particles deposit in the lungs? | alveoli
🗑
|
||||
| What is coal miners pneumoconiosis? | deposition of coal dust in respiratory bronchioles
🗑
|
||||
| What does cigarette smoke do to the lungs? | increased resistance
🗑
|
||||
| What does the ductus arteriosus do? | shunts blood away from the lungs.
🗑
|
||||
| Why is blood shunted away from the lungs in an embryo? | lungs do not need blood because no diffusion is going on.
🗑
|
||||
| What is the purpose of the foramen ovale? | directs oxygenated blood to the heart and blood
🗑
|
||||
| Why is placental gas exchange NOT efficient? | The blood flows haphazard around and the blood supply is in parallel so oxygenated blood mixes with de-oxygenated blood
🗑
|
||||
| What are the respiratory changes at birth: switching from placental to lung gas exchange? |
🗑
|
Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Created by:
tjamrose
Popular Physiology sets