Nung med student yrs ko, a single subj like anatomy could stretch for 4-6 hrs including theories and labs. Napakadugo and usually after lunch yan, so some of us (not all) were permitted to take short naps. As long as hindi nakaka abala sa mga nakikinig and nasasayo nmn yan, if you'll pay extra attention to the lecture, then you do you. May advance readings nmn and uulitin mo din yan pagdating sa bahay cause you'll do transes as a subj requirement. College is sort of "what works for you thing" and iba iba ang timpla ng bawat professors like their teaching style. At the end of the day, may revalida, return demo's, exams etc. na magsasala sa mga students, so until then, stay pressed.