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Questions tagged [respiration]

The exchange of gases across organs that facilitate transport of the gases to and from the cells of the organism.

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How do ants get oxygen in deep colonies?

With ant colonies getting to be +7 feet deep, how does oxygen renew that deep for their respiration demand?
Arrrstin's user avatar
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43 views

Non-cumbersome respiration sensor for sleep study?

I'm working on a project where I collect ECG signal from multiple volunteers, derive ECG derived respiration(EDR) from the timestamped ECG signal and calculate the cross correlation between EDR and ...
Naveen's user avatar
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What is the mechanism behind ventilatory acclimatization?

In my respiratory physiology lectures, my professor explained that hypoxia-induced hyperventilation occurs in 2 stages when people try to acclimate at high altitudes. My question is about the long-...
Rachel W's user avatar
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109 views

How does Anabantoideis' labyrinth function? What does it look like?

Anabantoideis are fish with an organ that allows them to take oxygen directly from the air outside of water. However, I cannot find much on how this functions, nor can I find any clear image of what ...
E.UCIT's user avatar
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Is it incorrect to assume alveoli as spherical and distinct, especially when analysing lung inflation/deflation?

I have recently read the paper "Laplace’s Law and the Alveolus: A Misconception of Anatomy and a Misapplication of Physics". To summarise it, here is a section from its abstract: The ...
Alexander51413's user avatar
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Are small CO₂ concentrations devastating to certain cognitive tasks?

A new study shows strong effects of what should be a negligible CO2 concentration. The paper "Is CO2 an Indoor Pollutant? Direct Effects of Low-to-Moderate CO2 Concentrations on Human Decision-Making ...
Kevin Kostlan's user avatar
2 votes
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39 views

Cellular respiration and membrane surface protons

The final product of cellular respiration is the proton motive force, formed by protons pumped out of the membrane and by the voltage due to all charges. While Mitchell’s original theory considered ...
scrx2's user avatar
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Is it true that oxygen levels in water limits fish size?

This answer says that breathing water is inefficient, and that may act as a limiter to the size of fish. I've heard this in a couple of other places as well, but cannot recall the sources. However, ...
Charlim's user avatar
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How do schools of fish get enough oxygen?

Fish get oxygen from the water running over their gills, during which up to ~80% of oxygen is removed from the water. In schools of fish, how do fish swimming behind other fish get enough oxygen in ...
askwer's user avatar
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Can all oxygen be provided cutaneous in humans?

What partial pressure of oxygen is needed on the skin to completely replace the lungs function as oxygen receivers? Respiration has other functions too. I am only asking about oxygen intake. ...
David Jonsson's user avatar
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Why is thoracic breathing dominant in women while abdominal breathing is dominant in men?

In human males, lateral movement of thorax constitutes 25% of breathing while abdominal movement accounts for 75% of breathing. It is exactly the opposite in the case of women. I got this piece of ...
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Why does cutaneous respiration need moist skin?

My teacher told me the other week, that respiration through skin (cutaneous respiration) cannot happen without moist skin. That is why frogs have moist skin. My question- Why does cutaneous ...
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Validity of measurements of respiration in isolated mitochondria

I've recently read a couple of papers on exercise and mitochondria, in which state 4 and state 3 respiration rates and ROS production are assessed in vitro after exercise has been performed (i.e., rat ...
Jim Willis's user avatar
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What is a rough estimate of CO₂ saturation for high-yield or high growth rate plants?

Naturally, plants have individual photosynthesis capacities, but it would still be interesting to get a general picture of CO2 saturation levels for some common cultures. Where lies the optimal yield, ...
Henrik Erlandsson's user avatar
1 vote
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What is the contribution of respiratory rate to oxygen absorption?

Firstly, I am aware that oxygen absorption in the alveolus is perfusion limited. Apparently, oxygen equilibrates in ~0.25 seconds or 1/3rd of the way along a pulmonary capillary. However, we are ...
TheAnonymous's user avatar
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Is the net gain of ATP during glycolysis 2 or 8?

As I understand, 2 ATP are consumed during steps 1 and 3 (glucose -> glucose-6-phosphate and fructose-6-phosphate -> fructose-1,6-bisphosphate) and then 4 ATP are produced during steps 6 and 9 (...
Aditya Kumar Panda's user avatar
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Haldane effect plays more important role in promoting carbon dioxide transport than that of the Bohr's effect in promoting oxygen transport why?

This is the actual question And the correct option is "A" But I can't figure out why Haldane effect plays more important role in promoting carbon dioxide transport than that of the Bohr's ...
G Subham's user avatar
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What does equilibrium curve signify?

While learning about gas exchange, I came across the haldane effect. Then i came across the CO2 -dissociation curve. Apparently the curves are "equilibrium curves". Does it mean that the ...
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What is the relationship between the oxygen affinity of hemoglobin and the maximal oxygen uptake (VO₂ max) of the human body?

I was curious about whether any of the numerous documented human hemoglobin variants conferred a quantifiable athletic advantage but the only thing I've found of any relevance is the relative oxygen ...
小奥利奥's user avatar
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What is the effect of surfactant deficiency on dead space (of lung volumes)?

Surfactant deficiency in adults with acute respiratory distress syndrome has long been recognized. This deficiency causes decrease in lung volumes (tidal volume or redisual volume for example). Dead ...
Vsh's user avatar
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Is there a known efficiency rate for CO2 capture from ambient air in photosynthesising plants?

When humans take in air to their lungs, we capture about 5% of the total quantity of the air as oxygen (which in turn equals about 24% of the available oxygen in the air) Is there an equivalent rate ...
Amphibio's user avatar
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Calculation of Respiration Fluxes in Terrestrial Ecosystems Based on Total Respiration (RT)

Overview Researchers have been studying a temperate grassland ecosystem with the view to understand it's current status with regard to carbon inputs and outputs and to identify whether the grassland ...
Alice Hobbs's user avatar
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Why is the V/Q Ratio 0.8 not 1?

According to: https://en.wikipedia.org/wiki/Ventilation/perfusion_ratio the ideal V/Q Ratio would be 1.0 because 1 L of blood can hold about 200 mL of oxygen and 1L of humidified air has about 200 mL ...
Hank Lin's user avatar
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In electron transport system the final acceptor of proton is?

My lecture notes say that the answer to this is inorganic phosphate (iP)..and the question is about proton not electron so the answer can't be oxygen. But I don't understand how is the answer iP
radhika mehta's user avatar
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How much pressure can human withstand if inner and outer pressure is balanced?

I know human can't dive too deep because there's pressure difference between inside and outside of the body. But how much pressure can human withstand if human is breathing components that is ...
Jason's user avatar
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1 answer
213 views

Could fish safely "breathe" pure oxygen in their water?

I've heard it said various times before that humans can't breathe pure oxygen, or at least not for very long, before it would kill us. But during a discussion on Worldbuilding, the difference between ...
Mason Wheeler's user avatar
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29 views

Insect decline and CO2 concentration

In the UK, where I live, for several years we have had cold dry springs which seems to delay appearance of insects. So irratic weather could cause species to emerge out of sync with their food species ...
user36093's user avatar
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Why does fresh zinc oxide cause chills but "old oxide" does not?

Inhalation of fresh zinc oxide causes chills; aka- zinc chills, brass founders ague, oxide shakes, etc. But if the oxide is a few hours old it will not cause chills. I had them once long ago, an old ...
blacksmith37's user avatar
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Where does nitrogen go or come from as its partial pressure in different parts of the lungs decreases or increases?

Here's a table from Guyton and Hall Textbook of Medical Physiology showing the partial pressures of gases in different types of air: We can see that as the partial pressures of some gases decrease or ...
athlonusm's user avatar
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Does COVID interfere with internal respiration?

Siddiqi et al. wrote in January 2021, Pulmonary ECs [= endothelial cells, in this paper] have an important role in immune surveillance, maintaining alveolar integrity and ensuring appropriate oxygen ...
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Lungs permeability

My question is: $O_2$ and $CO_2$ pass to (in & out) the bloodstream due to difference in partial pressure and its permeability to those gases (I suppose that's why no $N_2$ passes). So, to what ...
Adrián's user avatar
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Anaerobic Respiration vs Aerobic Respiration during physical activity

So I was wondering about the difference between aerobic and anaerobic respiration on the context of burning calories. While swimming we can choose to keep our head up and breathe, or keep our head ...
DuttaA's user avatar
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166 views

Oxygen dissociation curve and temperature

Say, we have a container with a mixture of gases. The concentration of oxygen is $C_{oxy}$ and its partial pressure is $P_{oxy}$. We then introduce a sample of hemoglobin (deoxygenated) in that ...
deechitpoudel's user avatar
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0 answers
361 views

Mammal size and capillary wall thickness

How does capillary wall thickness vary with the size of the animal? Background/context of question: Of the following, Figure 1 is most consistent with the fact that, in general, smaller mammals have:...
K-Feldspar's user avatar
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6k views

Abdominal muscles during inspiration/inhalation

During inspiration I am aware that the diaphragm and the external intercostal muscles contract, thus increasing the volume of the thoracic cavity. However, I read on my textbook that during ...
city7lights's user avatar
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30 views

How does vasomotor and bronchomotor reactions equilibrate local blood flow to correspond local ventilation?

I am trying to find some figure(s) to explain this. There is probably better name for "bronchomotor" reaction. They seem to opposite terms and actually affecting same things (alveolar diameter/tone); ...
Léo Léopold Hertz 준영's user avatar
0 votes
1 answer
75 views

Is it possible to consume O2 via a pill form to inhibit the need to breathe?

Just wondering if it would be theoretically possible to consume oxygen via O2 pills, in the effort of being able to hold one's breath without limit. Totally just curious.
Shane Duffy's user avatar
-1 votes
1 answer
56 views

What happens if ace2 from lungs is removed? Will there be any major impact on our body?

when ace2 receptors are not present in the lungs will we experience any disturbance or suffer from any other problems
Akash ram kamal's user avatar
-2 votes
1 answer
22 views

Light Hyperoxia

Imagine you're in some lowland way below sea level were the oxygen partial pressure is higher than at sea level but still lower than the 0.5atm limit. Would their be any effect that isn't deadly or ...
Jean-Abdel's user avatar