Questions about oxygen level in humans

  • Thread starter Thread starter jnimagine
  • Start date Start date
  • Tags Tags
    Oxygen
AI Thread Summary
The discussion centers on two questions regarding oxygen levels in humans. It confirms that when the partial pressure of O2 is 0 mm Hg, hemoglobin cannot bind to oxygen, making the initial statement false. Additionally, it states that approximately 25% of oxygen in human arterial blood is consumed by tissue metabolism under resting conditions. The reasoning provided for the first question is deemed correct, suggesting a possible miscommunication in the original query. Overall, the thread emphasizes the relationship between oxygen binding and carbon dioxide levels, as well as oxygen consumption in metabolism.
jnimagine
Messages
176
Reaction score
0
1. The % of hemoglobin bound with Oxygen is different at high and low carbon dioxide concentrations when the partial pressure of O2 equals 0mm Hg
True or false??
This should be false right...? if partial pressure is 0... Hb can't bind to any oxygen in the first place... is my reasoning correct?

2. 25% oxygen in human arterial blood consumed by tissue metabolism
True or false
i'm not sure if it's actually 25%... :S

I would greatly appreciate any help!
Thank you!
 
Physics news on Phys.org
jnimagine said:
1. The % of hemoglobin bound with Oxygen is different at high and low carbon dioxide concentrations when the partial pressure of O2 equals 0mm Hg
True or false??
This should be false right...? if partial pressure is 0... Hb can't bind to any oxygen in the first place... is my reasoning correct?

2. 25% oxygen in human arterial blood consumed by tissue metabolism
True or false
i'm not sure if it's actually 25%... :S

I would greatly appreciate any help!
Thank you!

2. 25% oxygen in human arterial blood consumed by tissue metabolism

Yes, good enough for resting conditions. Good simple explanations in here http://people.eku.edu/ritchisong/301notes6.htm

Q1 reasoning is correct, you must be up against a miscopying or misprint or something. Knowing that you can probably work out what is meant.
 
Thread 'Confusion regarding a chemical kinetics problem'

Thread 'Confusion regarding a chemical kinetics problem'

TL;DR Summary: cannot find out error in solution proposed. [![question with rate laws][1]][1] Now the rate law for the reaction (i.e reaction rate) can be written as: $$ R= k[N_2O_5] $$ my main question is, WHAT is this reaction equal to? what I mean here is, whether $$k[N_2O_5]= -d[N_2O_5]/dt$$ or is it $$k[N_2O_5]= -1/2 \frac{d}{dt} [N_2O_5] $$ ? The latter seems to be more apt, as the reaction rate must be -1/2 (disappearance rate of N2O5), which adheres to the stoichiometry of the...
View full post »

Thread 'Prove that evolution is constant (Provide at least two arguments to support your position)'

I don't get how to argue it. i can prove: evolution is the ability to adapt, whether it's progression or regression from some point of view, so if evolution is not constant then animal generations couldn`t stay alive for a big amount of time because when climate is changing this generations die. but they dont. so evolution is constant. but its not an argument, right? how to fing arguments when i only prove it.. analytically, i guess it called that (this is indirectly related to biology, im...
View full post »

Similar threads

Query re: Partial pressures of O2 in high vs low pressure environments
Replies
4
Views
2K
About the binding of O2 to Hemoglobin molecules
Replies
5
Views
2K
Why Do Deep-Sea Divers Use Helium-Oxygen Mixtures Instead of Compressed Air?
Replies
1
Views
7K
What happens to non-respiratory gases in the lungs?
Replies
3
Views
2K
Questions on respiratory system?
Replies
24
Views
11K
Diffusion rate of oxygen through skin
Replies
2
Views
3K
Oxygen Enriched Internal Steam Compression Ignition Engine (OEISCIE)
Replies
14
Views
4K
Partial pressure of gases in various parts of the respiratory system
Replies
5
Views
22K
Chemistry Difficult AP Chemistry Question (Titration + Calculating Moles)
Replies
6
Views
18K
Plants, cell communication, digestion, and circulation
Replies
2
Views
5K

Hot Threads

Recent Insights

Back
Top