All cells within an organism will have the same number of chromosomes except the gamete.
a. true
b. false

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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the second type of galaxy is called a barred spiral, which has a thing called a bar straddling the nucleus