For the rest of your MS1 year (January to June), you'll be taking multiple courses each block. For example, you'll have Immunology, Pathology, Pharmacology, and Head/Neck Anatomy as four separate courses, each with its own exam, in block 4. One day, you may have two pathology lectures followed by two immunology lectures... another day you might have one lecture for each class, etc. It just depends.
Block 5 - Behavioral Science I, Infectious Disease I, Nervous System I, and Ethics
Block 6 - Behavioral Science II, Infectious Disease II, Nervous System II
Blocks 5 and 6 are two months a piece, so it's quite a marathon, but well worth it! In my opinion, the nervous system course (I and II) is the best taught course at BCM. Keep in mind that you'll still be doing IPS and PPS and have the same PPS preceptor for your entire MS1 year. Also, "gross anatomy" (with the cadaver) is finished at the end of block 4; however, the anatomy lab will be converted to a neuroanatomy lab for blocks 5 and 6 where you'll explore the perfection that is the human brain.
As an MS2, your blocks will be substantially shorter (roughly 3 weeks), but lectures are still in the same format (4 lectures from 8am-noon). You'll have exams for each course at the end of each "mini" block (7a, then exams, 7b, then exams, 8a, then exams, etc.)
Block 7a - cardiology & heme/onc
Block 7b - respiratory & renal
Block 8a - GI & hard/soft tissues
Block 8b - genitourinary/gynecology & endocrine
Block 8c - genetics & age-related topics
This website should help outline everything:
BCM preclinical curriculum
The whole point of the last 6 months of basic sciences is to prepare you for clinicals. The material is centered around clinically-relevant pathologies, you'll now be with two of your classmates with a new preceptor somewhere in the medical center, exams have more clinical vignette style questions (patient comes in with x, y, z, what test would you do next?).
Hopefully this clarifies a few of the ambiguities!