What is a type 1 survivorship curve? A type 1 survivorship curve is a concave curve/ convex curve/ straight line, and individuals that survive from childhood to adulthood. The greatest number of deaths occurs during old age. An example of a type 1 curve is seen in humans/ oysters/ small birds.

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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answer: c.

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