Which of the following is a result of gravitational forces in the solar system?
a.
saturn is further away from the sun than earth
b.
the orbit of moons around their planets in the solar system
c.
the radiation given off by jupiter
d.
the difference in surface temperature on each of the planets

B.

the orbit of moons around their planets in the Solar system

Explanation:

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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when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.