How does your heart know to continue to beat while you sleep?

John is jogging on a winter day. the outdoor temperature is 31° f. yet his body temperature is 98°f. which term best describes the process causing this difference in temperature?

Mark's girlfriend dropped him off at a party, and then she went to visit her best friend two blocks away. when mark called his girlfriend to get a ride home, he could tell she had been drinking. what is mark's best plan of action? ride home with someone else and let his girlfriend drive herself get a friend to take him to his girlfriend's car so he can drive them both home ask his girlfriend to drive to the party, and then mark will drive them both home let his girlfriend drive them home slow to avoid getting pulled over

Stuart runs with his brother each morning, and they can only speak one or two words at a time between multiple deep breaths. which best describes their heart rates during this activity? low moderate vigorous dangerous