Hot answers tagged respiration
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The glycogen in the liver begins providing blood glucose. Muscle glycogen is used as fuel by the muscles, fat cells (adipose tissue) release fatty acids to manufacture ketone bodies in the liver and to be used by the brain as fuel, and body proteins are converted to glucose.
In short, the body's metabolism shifts to catabolic reactions.
If this continues ...
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This article quotes a professor of respiratory physiology that says "dogs are built to pant just right. The mechanics of their lungs and chest set a precise rate for panting that minimizes the amount of work while maximizing cooling power." They also don't breathe fully when panting, so they can still cool themselves without increasing gas exchange. This is ...
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This shows the major biological transformations of carbon in any system (not just lakes).
On the Left Side:
$GPP$ (Gross Primary Production) is the total amount of $C$ from atmospheric $CO_2$† that is reduced into organic molecules during the calvin cycle of photosynthesis. This is the process performed by photosynthetic organisms like green ...
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According to Wikipedia
"In a healthy, young adult, tidal volume is approximately 500 ml per inspiration..."
(tidal volume is the volume inspired/expired)
Using this figure, together with values for gas composition also taken from Wikipedia, I estimate that in each breath we take in 18 mg O2 (1.1 mmol) and we release 36 mg of CO2 (1.2 mmol) plus 20 ...
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The switch from glucose to ketone bodies as the principal blood metabolite accompanies starvation. This prioritizes the heart, which preferentially uses ketone bodies as a fuel (update; actually it's fatty acids, but they're metabolically similar.) This de-prioritizes the brain, which preferentially uses glucose.
[edit]
I was asked for a source. This is ...
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