When you mix copper and tin, you make bronze. no chemical reaction occurs. What is bronze

Bronze is an alloy.

Explanation:

IDK if this is the answer you were looking for, but bronze is an alloy and the creations of alloys are not chemical reactions. An alloy is made when a metal is combined with another metal or a nonmetal. In this case, copper and tin are both metals.

the answer that best describes the relative refractory period in the neuron is the resting membrane potential is restored, but concentrations of sodium and potassium are not restored to their original state.

the refractory period is the time during which another stimulus given to the neuron will not lead to a second potential. thus, because na+ channels are inactivated during this time, additional depolarizing stimuli do not lead to new action potentials.  

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lysosomes contain a variety of enzymes, enabling the cell to break down various biomolecules it engulfs, including peptides, nucleic acids, carbohydrates, and lipids (lysosomal lipase). the enzymes responsible for this hydrolysis require an acidic environment for optimal activity. hope i !