Do mice inhale and exhale the same ratio of O to CO2 as a human and if not what's a good small animal that can compare?
I'm doing a science fair project on enclosed environment breathing and I need a good scaled down experiment that if scaled up would work for a person. The experiment is to make an artificial enclosed environment using algea to collect CO2 and produce O2.
Why is the respiration rate for a human lower than that for a mouse?
It has to do with metabolism. Small animals like mice burn energy faster and this produces CO2 at a faster rate. They breathe faster because there body needs to exchange gas at a higher rate. This also applies to babies. For instance, a baby is developing at a high rate and this burns energy very quickly. They breathe faster to adapt to the bodies need to expel CO2 which is the bi-product when energy is used. It all has to do with metabolic rate.
What is the mass of oxygen inhaled during one normal and full breath?
Nissim Raj Angdembay's calculation is very good.An ordinary breath for a 70-kg adult is about 500ml of air. We call this the tidal volume. Since oxygen is 21% by volume of air, then the volume of oxygen inhaled is about 105ml.The density of pure oxygen at sea level is 1.43kg per cubic metre. So 105ml of air has a mass of about 150mg, or 0.15g.The forced vital capacity is the volume you can voluntarily breathe, from the lowest possible volume in your lungs to the highest possible volume in your lungs. The figure is about 3.5 litres for a 70-kg adult male.However, it's very inefficient to breathe like this, even during exercise. Athletes will increase their tidal volume, but also their respiratory rate, in response to exercise. The minute volume is the product you get when you multiply tidal volume by respiratory rate, and is a much more helpful way to look at breathing than the vital capacity.
Summary for celllular respiration & photosynthesis.?
Cellular respiration: oxygen + glucose = carbon dioxide + water + energy Okay, we breathe in oxygen and eat food. The food is broken down to glucose and used for energy. Carbon dioxide and water are co products. photosynthesis carbon dioxide + water + sunlight = glucose(starch) + oxygen + energy plants take in CO2 and water and sunlight. And make starch which in turn makes energy. Oxygen is released
What would happen if we stopped emitting CO2?
This is asked of people who believe either that the environment is not warming or is warming totally or mostly naturally. If mankind were to stop emitting CO2 and other greenhouse gases, what do you believe would happen? What physical reactions would be in play? * The environment would cool due to less greenhouse gas in the environment? * Nothing, because emitting greenhouse gases do not cause greenhouse gases to accumulate in the environment? * Nothing because there is no such thing as greenhouse gases or the greenhouse effect? It is something else that keeps the earth warm. * Nothing because the greenhouse effect is real but only gases produced by God can cause the greenhouse effect; man is too puny to affect climate? * Nothing because the greenhouse effect is either on or off: the natural amount of greenhouse gases causes the greenhouse effect but the amount of gases does not affect its strength? * Very little because there are no positive feedbacks such as increased water vapor and decrease albedo? * Nothing because the earth has some force that automatically cancells anything mankind does to it? What is that force? * Nothing because the 35% increase in CO2 in the air since 1900 is too little to affect the strength of the greenhouse effect? * Something else? I am trying to understand you. If emitting greenhouse gases is not enhancing the greenhouse effect (or not significantly) , what do you believe would be different if we were to stop and why? Thank you in advance for your honest and thoughtful answers.
What are the first branches of the human respiratory system?
See http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/P/Pulmonary.html
Why can't humans breathe in water?
Gills allow a high volume of water to pass the oxygen-absorbing tissue in a water that lungs don’t. If we were strong enough to expand and contract our lungs around water the same way we do around air, we would then run into problems because there isn’t much oxygen dissolved in water. We would need to ‘breath’ much faster.Warm blooded creatures like us need more oxygen per kilogram than fish do ( I think tuna are heated by internal muscular action which is different than our process but I am not certain) so even if we had gills, we would need to through-put a lot of water to gather enough oxygen.
Prior to swimming under water a diver breathes deeply and rapidly for a few seconds. Why?
Replenishes the amount of gas
Can humans breathe 100% oxygen (pure oxygen) and live?
Our blood has evolved to capture the oxygen we breathe in and bind it safely to the transport molecule called haemoglobin. If you breathe air with a much higher than normal O2 concentration, the oxygen in the lungs overwhelms the blood’s ability to carry it away.Pure oxygen is toxic only when inhaled over an extended period of time — a general rule of thumb being restricting its use to less than 24 hours.The problem with long-term use of pure oxygen is its ability to rapidly generate oxygen free radicals.Oxygen free radicals, unlike molecular oxygen (O2), are unstable and highly reactive— this is attributed to the odd-number of electrons in the outer orbits of the free radicals.In order to stabilize itself, the free radicals scavenge for an extra electron by reacting with important intracellular components like DNA, proteins, lipids etc. damaging and rendering them non-functional. The cell that the free-radicals interact with, therefore, dies.Now what would happen if you breathed 100 percent oxygen? In guinea pigs exposed to 100 percent oxygen at normal air pressure for 48 hours, fluid accumulates in the lungs and the epithelial cells lining the alveoli. In addition, the pulmonary capillaries get damaged. The damage was attributed to oxygen free radicals. In humans breathing 100 percent oxygen at normal pressure, here’s what happens:-- Fluid accumulates in the lungs-- Chest pains occur during deep breathing-- The total volume of exchangeable air in the lung decreases by 17 percent.The astronauts in the Gemini and Apollo programs breathed 100 percent oxygen at reduced pressure for up to two weeks with no problems. In contrast, when 100 percent oxygen is breathed under high pressure (more than four times that of atmospheric pressure), acute oxygen poisoning can occur with these symptoms - Nausea, Dizziness, Muscle twitches, Blurred vision, Seizures/convulsions etcIt is not that 100% oxygen should never be used. Not using pure oxygen when indicated, like in cases of heart attacks, asthma attacks, carbon-monoxide poisoning etc., will lead to catastrophic consequences (read: death).Pure oxygen is not poison, that is, a whiff or two of it is not going to be harmful to anyone in any manner but breathing it at pressures of 0.5 bar or more for more than 16 hours can lead to irreversible lung damage and, eventually, death.Source: Is it harmful to breathe 100-percent oxygen?,Google images