chemoreceptors

Central chemoreceptors only monitor pH of the cerebrospinal fluid, which indirectly tracks blood CO2, but don't monitor O2.

Other posters have pointed out that this is false(you will continue producing CO2 while unconscious just fine, chemoreceptors will notice).

There are also chemoreceptors for oxygen concentration in the circulatory system as well.

We've got built in chemoreceptors, so why be paranoid as though we didn't?

I did want to add that the lack of oxygen can affect respiration, which is detected by the peripheral chemoreceptors, like in the carotid bodies.

Peripheral chemoreceptors monitor O2, CO2, and pH.

Catfish have chemoreceptors across their bodies.

Given its deficit in neural processing power, we expect that the nematode approaches one-to-one matching between chemoreceptors and odorants, with less reliance on combinatorial processing than the fly.

This would imply that nematode chemoreceptors have very tight tuning curves compared with either fly ORs or MOx sensors and may account for the remarkably large number of chemoreceptor genes identified in the C.

I'm tempted to ask if you acquire semantics via nasal chemoreceptors or via absorption in the small intestine (and if the latter, I'm going to get a bottle of ketchup and take another pass at Kant).

Sperm are actually quite good at finding the egg if they make it to the fallopian tube, they have their own chemoreceptors that can detect very small changes in chemical gradients, but only a few hundred make it through the preceding gauntlet.

While it's thought that the amygdala contains CO2-sensitve chemoreceptors as this article states in the first paragraph, this behavioral result shows that other brain areas do too, and activation of these chemoreceptors is sufficient to produce fear even without the brain's "fear center."

"mosquitoes can also hack into bacterial communication systems using chemoreceptors on their antennae, rather like World War II code-breakers intercepting an encrypted transmission" Is it just to mundane to say mosquitos can smell using chemoreceptors on their antennae, rather like you smelling with your nose?