Laura_2707 wrote:Hi,
Just wondering if you could go through how you got the solution for q13, I understand the meaning of the graph but am not sure why you need to do the calculations when the info is on the graph and why the answer is B and not C!
Thanks
horbowiec.7527 wrote:This is regarding Biology Chapter 12 Worked solution for Q13 (BIO-237):
I have looked at bottom x axis on Volume Percent Oxygen in Atmosphere and assumed 90-100% is optimal (as passage said below 90% is low) and that corresponds to around 30-35 for sea level equivalent and then I just looked at Total pressure psia which was around 4 psia for that level and chose B because of that.
horbowiec.7527 wrote:I can see worked solutions derive this answer completely differently and I am confused why those calculations and how based on passage I were to know this calculations?
horbowiec.7527 wrote:This is regarding Biology Chapter 12 Worked solution for Q11 (BIO-235):
A little stuck on this explanation:
Heimlich Maneuver includes upward abdominal thrust - forcible maneuver which suddenly increases size and pressure in thoracic cavity.
How come if size is increased pressure increases? I thought it's the opposite...
If you apply upward pressure to abdominal cavity you will notice that your chest (thoracic) size increases. Of course, your thoracic volume is decreasing due to abdominal contents entering the chest cavity.
How come size is increasing and volume is decreasing in the same time?
horbowiec.7527 wrote:Sorry still not quite understanding it:
you say: "The fact that the Heimlich Maneuver includes an upward abdominal thrust means that it is a forcible maneuver which suddenly increases the size and pressure in the thoracic cavity thus dislodging the food."
How come if size or volume of thoracic cavity is increased the pressure increases? I thought it's the opposite...
KatherineDever wrote:Hello,
I was wondering if you could explain the reasoning behind question 14 as I am a little stuck with the graph in the worked solutions.
emstevens46670 wrote:Hey,
I was just wondering how you determine the answer for question 4?
I have looked at the worked solutions however I am still extremely confused.
Thank you so much,
Em
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