In the context of the neural impulse, which of the following is true about the depolarization of neuron membranes?

the index of refraction of the second medium is higher. i just took the test trust me !

enzyme active site and substrate specificity

enzymes bind with chemical reactants called substrates. there may be one or more substrates for each type of enzyme, depending on the particular chemical reaction. in some reactions, a single-reactant substrate is broken down into multiple products