BIO SCI 93 Lecture 1:

• School: UC-Irvine
• Department: Biological Sciences
• Course: BIO SCI 93
• Professor: Dr. Salme Taagepera

Document Summary

Alexis st. martin was shot in stomach healed with hole in stomach. Beaumont performed experiments on hole in stomach. Collect acid from stomach drop food in that acid observe. Up until late 1900s most doctors believed that excess stomach acid caused ulcers. Possible design study for stomach acid and ulcers (people w/ ulcers are split into groups) Group 2: receive placebo pills (control group) Dependent variable: assess the number of ulcers per patient after a period of time. Examined stomach biopsies of patients with various stomach ailments. Thought he saw helicobacter pylori - new species of bacteria- in biopsies from ulcer patients (no one believed him) To convince colleagues, he used special stain to highlight bacteria. They didn"t think they had anything to do with ulcers. Surveyed patients who has ulcers and looked for h. pylori. 100 stomach ulcer patients surveyed (biopsy taken) Next wanted to see if antibiotics cured ulcers.