One evolutionary trend is that as you move from simpler animals to more complex animals, Systems become more specialized.
Answer:
E. that area of the membrane is in the absolutely refractory period.
Explanation:
Refractory period is a period during which neuron cell cannot be stimulated (depolarized). This is why the action potential can only travel in one direction from the neuron body towards axon.
Refractory period occurs because of the inactivation of voltage-gated sodium channels (while action potential is at its peak) which cannot be open for a certain period of time. and membrane cannot be depolarized.
The earth's core is divided into two layers: the outer and inner core. The outer core borders the Earth's mantle and is approximately 1,430 miles<span> in thickness. The inner core has a thickness of 750 miles, giving the core a combined thickness of 2180 miles. lol....
I hope this helps!!! :)</span>
