Which conditions resulted in the erosion of larger rocks,
like the one circled in the image? check all that apply.
low gradient, low velocity
low gradient, high velocity
low gradient, high volume
high gradient, low velocity
high gradient, high velocity

biology is the study of life. it is the study of living organism.

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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in a chemical reaction, the atoms and molecules produced by the reaction are called products. no new atoms are created, and no atoms are destroyed. in a chemical reaction, reactants contact each other, bonds between atoms in the reactants are broken, and atoms rearrange and form new bonds to make the products.