The odorant molecules arrive either directly by diffusion into the mucus, or are supported by transport proteins (odor binding protein or OBP) that allow the hydrophobic molecules - majority - to penetrate the mucus covering the epithelium, and thus to reach the membrane receptors present on the eyelashes of the olfactory neurons. These transport proteins are thought to concentrate odorant molecules on membrane receptors. As ligands, the odorant molecules bind to membrane receptors on the eyelashes, triggering a transduction pathway for a stimulus involving G.olf protein (first messenger), adenylate cyclase, and cAMP ( second messenger). The second messenger causes the opening of ion channels Ca2 + / Na + present on the plasma membrane of the olfactory receptor, these two ions then enter the cell. Ca2 + causes the opening of a Cl- channel, the output of this ion causes depolarization of the membrane so that the olfactory receptor produces action potentials. These impulses will go directly to the olfactory bulb, in the prefrontal region of the brain, where this information (and that of taste) is processed by the body.
Some people may think acid or alcohol kills off the bacteria, but it doesn't eliminate all of it, and enough contamination remains that it could make you sick. The best way to use leftover marinade as a sauce is to boil it, according to the USDA's Food Safety Guidelines.
It's a type of neurosis. If an animal is pacing back and forth in a repetitive behavior, (called Abnormal Repetitive Behavior, or ARB) that means that it is time to release the animal back into the wilderness.
The answer is B. <span>Rate and depth increase
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When you exercise you take more breaths and the breaths you take are alot bigger than normal. The more your heart rate speeds up, the more these effects kick in. This is to </span><span>tmake sure that more oxygen is absorbed into the blood.
Hope this helped. Have a great night!</span>
