B is the answer to this question
A Muscle Contraction Is Triggered When an Action Potential Travels Along the Nerves to the Muscles. Muscle contraction begins when the nervous system generates a signal. The signal, an impulse called an action potential, travels through a type of nerve cell called a motor neuron.
Answer:
because it helps make friends and without friend u dont get a girl/boy friend and have kids allowing your family tree to grow bigger.................. math 101
Explanation:
Answer with Explanation:
"Moderate activity" is any activity that allows you to talk while doing it while a "vigorous activity" is any activity that <u><em>doesn't allow you to talk while performing it.</em></u>
An example of a moderate activity is <em>"walking."</em> You may have noticed that most people with friends talk while they walk. This is because their <em>heart rate</em> <u>is not that fast</u>, and it doesn't affect much of their breathing.
An example of a vigorous activity is <em>"running."</em> People who run don't have the energy to talk, or if they ever do, <em>they pause for a bit</em>. This is because their <em>heart rate</em><u> is very fast</u>, and this affects their breathing. Thus, it is not common to see people running side-by-side while talking.
You should never over correct in an attempt to avoid the tree because u will hit another car and cause a major wreck
