Giving brainliest to good ! plz ! which is a warning sign of cancer? a. hoarseness or nagging cough b. difficulty swallowing c. obvious change in a mole or wart on your skin d. all of the above

D because a cough can be one sign of lung, B can be thyroid c can be skin

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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within 30 of the equator hope this