Answer:
The chemical receptors of cells have been defined as molecular structures to which other molecules considered as chemical messengers (neurotransmitters, hormones and other neuroactive molecules) specifically bind.
Chemical receptors can be located on the plasma membrane into which they insert by crossing it. Membrane domains have been defined for them and also on both sides of the membrane. The one on the external side corresponds to the binding site for messengers that come from other cells, a situation that defines the so-called heteroreceptors. If messengers coming from the cell itself join that site, the so-called autoreceptors are defined.
But chemical receptors can also be located inside cells. They are intracellular receptors and are found in the cytoplasm or in the nucleus. Messages act on them, which due to their chemical nature can cross the plasma membrane, such as steroidal hormones, thyroid hormones and neurosteroids
Explanation:
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Answer:
If we consider the entire nervous system as an electric grid, the central nervous system would represent the powerhouse, <u>whereas the peripheral nervous system would represent long cables that connect the powerhouse to the outlying cities </u><u><em>(limbs, glands, and organs) to bring them electricity and send information back</em></u>
Explanation:
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Answer: Sometimes your doctor may give you a course of antibiotics during your chemotherapy to help fight off an infection or stop you getting one.
Explanation:
Abnormal movements and involuntary movements of the mouth, tongue, and face
Answer:
The answer is B: It is a tube lined with a mucous membrane.
Explanation:
The pharynx is a smooth tube approximately 12 cm long, which begins at the level of the neck and ends at the epiglottis, is related to both breathing and oral use; it is lined with a mucous menbrana; emits intelligible sounds, being the biggest resonator.
