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:
I hope my answer helped you
Answer:
Before the discovery of antibiotics, there was nothing much anybody could do. Streptococcus pyogenes caused half of all post-birth deaths and was a major cause of death from burns. Staphylococcus aureus was fatal in 80 percent of infected wounds and tuberculosis and pneumonia bacteria were famous killers.
Explanation:
CO= HRXSV
CO=80X50
CO=4,000 ml
1L=1,000ml
4,000ml=4L
Therefore the answer is 4L/min
