Final answer:
Marcus likely experienced the release of endorphins during his football game, which reduced his pain perception and contributed to his good mood even after a finger injury.
Step-by-step explanation:
During the Friday night game where football player Marcus played well despite exhaustion, pain from a broken finger, and a lack of sleep, it is likely that the neurotransmitter known as endorphins was released in his body. Endorphins are produced in response to stress or pain and can create a feeling of euphoria and reduce pain perception, akin to a "runner's high." This may explain why Marcus was able to continue playing well and maintain a good mood despite his injury. It's interesting to note that while endorphins are often credited for the pain relief and mood boost associated with rigorous physical activity, recent studies have suggested that endocannabinoids might also play a significant role in creating this effect.
it was likely due to the release of endorphins in his body. Endorphins are neurotransmitters that can reduce pain and promote feelings of well-being and euphoria. They are released during exercise, excitement, and even during sex. Marcus' exhaustion from practice and lack of sleep may have triggered the release of endorphins to help alleviate his pain and enhance his mood.