What wakes humans up in the morning? can people wake themselves up in the morning without an alarm clock? my mom was mad i didn't agree god woke me.

Internal clock: Our brain has an internal clock which tries to get you to sleep and wake up at about the same time. Usually the first light exposure sets your time clock . People kept in total darkness runs a 25-hour cycle. The time clock is essential in keeping your hormonal secretion on time. When this clocks fails, people start to have sleep and often hormonal issues. I abstain from religious issues

Absolutely, though: far too complex for reliable scientific understanding currently: http://goo.gl/Blh6rW. Humans routinely awake for all kinds of reasons uniquely relevant to their individual life experiences/internalized beliefs/priorities ranging from upsetting internal-ideas/dreams to perceived external stimuli. Internal motivations/priorities=always key. E.g. actions always reflect motivations >> than words.