What are seismic waves an example of? A. longitudinal waves
B. transverse waves
C. both transverse and longitudinal waves
D. neither transverse nor longitudinal waves

longitudinal and transverse.

Explanation:

Examples of mechanical waves include ripples on the water surface (water waves), sound waves, and seismic waves. Mechanical waves can be classified into two categories based on the motion of the particles – longitudinal and transverse.

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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