study guide

8 Pages
Unlock Document

University of Toronto Scarborough
Biological Sciences
Stephen Reid

Lecture 22 Study Notes Slide 1 When helicobacter pylori bacteria have eaten through the phospholipid bilayer, pepsin and HCl could sip through and stimulate mast cells o Mast cells: cells that release histamine Histamine then performs positive feedback to stimulate parietal cells to release more HCl Dangerous cycle that could cause severe gastric ulcers Slide 2 The small intestine has 3 distinct regions o Duodenum: starting section in which digestive enzymes and bile are secreted into Most absorption occurs here Enzymes and bile are dumped here in order to be neutralized, which allows enzymes and stuff to work Most absorption occurs in first 20% of small intestine o Jejunum o Ileum: leads into the large intestine Illeocelcal sphincter divides ileum from large intestine Slide 3 There is a large surface area for absorption in the small intestine o Villi, that also contain microvilli, face the intestinal lumen and aid in absorption o Crypt of Lieberkhun: release HCO3 into small intestine to make the environment alkaline to allow enzymes to work Slide 4
More Less

Related notes for BIOC34H3

Log In


Don't have an account?

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.