MCAT Biology Question — Small Intestine
- Jul 15, 2017
- MCAT Question of the Day
The epithelial lining of the small intestine forms from which germ layer?
A. I only
B. II only
C. III only
D. I and II
Click for Explanation
As a guideline for the MCAT, the ectoderm forms outer coverings of body, e.g. skin/hair/nails, and the nervous system. The endoderm forms the lining of the digestive tract and most of the liver and pancreas. Mesoderm forms everything in-between, e.g. muscle, bone, circulatory system, heart, spleen, gonads.
A. I only, correct.
B. II only, incorrect: The mesoderm forms the tissues between the body’s outer coverings and the lining of the digestive tract.
C. III only, incorrect: The ectoderm forms the body’s outer coverings and nervous system.
D. I and II, incorrect: On the MCAT, organs and tissues will derive from one layer only.
Want more MCAT practice?
We’ve got options for every schedule and learning style!
From the best online MCAT course created by top instructors with 524+ MCAT scores to the most representative full-length practice exams and private tutoring, we can custom tailor your MCAT prep to your goals!
Not sure which option is right for you? Schedule a free MCAT consultation with an MCAT expert using the form below. No obligation, just expert advice.
Search the Blog
Interested in our Online MCAT Course, One-on-One MCAT Tutoring or Med admissions packages? Set up a free consultation with one of our experienced Senior Student Advisors.Schedule Now
MCAT Blog What's on the MCAT?
MCAT Blog How to Review MCAT Full Lengths
Free MCAT Practice AccountNeed great MCAT practice?
Get the most representative MCAT practice possible when you sign up for our free MCAT Account, which includes a half-length diagnostic exam and one of our full-length MCAT practice exams.Learn More