Chad ran a 10-mile race to raise money for charity. At mile 5, he started to feel pain in his muscles. By the end of the race, he was no longer in pain and felt happy as he crossed the finish line. What neurotransmitter probably relieved his pain and gave him a sense of reward

Acetylchloline

Explanation: this is one of the most richly supplied neurotransmitter in the body of man. It helps in body movement by helping muscles to strink. It also stimulate our reactions to pain.it is found only in the Central and pheripheral nervous system. It is a type of inhibitory and excitatory neurotransmitter that's help also in human memory and learning and also muscle contraction.

i do believe the correct answer is the spread of chinese culture throughout asia and africa.good luck

explanation:

aliens are not real, the myth was created about 700 years ago because people found markings in the field of their crops. also, no there were no aliens on the moon.

hope this ! give brainliest!