Which of the following descriptors is false regarding enzymes:
a) they affect only the rate of a chemical reaction
b) they lower the activation energy required for a reaction
c) they are proteins
d) they are consumed during the reaction
e) they function as biological catalysts

(d)they are consumed during the reaction

d) they are consumed during the reaction

Explanation:

Enzymes are the biocatalysts that serve to accelerate the rate of the chemical reactions by lowering down the required activation energy.

Enzymes are not used during the reactions. There are no physical or chemical changes in the enzymes during the chemical reactions. After completion of one chemical reaction, enzymes release the products and become available to catalyze the next round of the reaction.

it will increase due to the time span

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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