A punch is painful, while a hug is not, because a punch produces action potentials from each sensory neuron. A) stronger B) more frequent C) faster-moving D) fewer

B) more frequent

Explanation:

This occurs because a punch produces more frequent action potentials from each sensory neuron. This is only caused when there are rapid and sudden changes. A punch is fast and causes very sudden changes when the punch comes into contact with the human body. This therefore, causes these fast and sudden changes which fire very frequently from each sensory neuron. A hug is soft and does not affect the human body in such a sudden way so it does not cause frequent action potentials.

answer; i believe that the correct answer is(d) nondisjunction during meiosis;

the supermassive black hole is in the middle of the galaxy.