Hurricanes are tropical cyclones that occur in the North Atlantic Ocean or the Northeast Pacific Ocean and remain east of the International Dateline
<span>In the "all or none" law of muscle contraction, it states that when the stimulus applied exceeds threshold then the the nerve sending signals to a few muscle fibers will give a complete response; contraction. Graded response is dependent on how many motor units have been recruited. The more motor units, the greater the force in the contraction.</span>
Credit for developing cell theory is usually given to two scientists: Theodore Schwann and Matthias Jacob Schneider. While Rudolf Virchow contributed to the theory, he is not as credited for his attributions toward it.