Answer: Receptor proteins
Why?
Cells have proteins called receptors that bind to signaling molecules and initiate a physiological response. Different receptors are specific for different molecules. Dopamine receptors bind dopamine, insulin receptors bind insulin, nerve growth factor receptors bind nerve growth factor, and so on.
ATP, exocytosis is active
<span>Active and passive transport, process where waste is released from the cell is both
and the rest are passive
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Its the one with influenza that traveled to many different coultries
CO2 or carbon dioxide is an example of a compound element. A compound element is formed into a new substance when two or more elements are chemically combined. One of the most common examples is CO2 or carbon dioxide. The elements combined are carbon and oxygen.