OER 2016 Edition

ISBN: 9781947172173

Author: OpenStax

Publisher: OpenStax College

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Chapter 1, Problem 33PE

Approximately how many atoms thick is a cell membrane, assuming all atoms there average about twice the size of a hydrogen atom?

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Chapter 1, Problem 32PE

Chapter 1, Problem 34PE

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Helicobacter pylori (H. pylori) is a helically-shaped bacterium that is usually found in the stomach. It burrows through the gastric mucous lining to establish an infection in the stomach's epithelial cells (see photo). Approximately 90% of the people infected with H. pylori will never experience symptoms. Others may develop peptic ulcers and show symptoms of chronic gastritis. The method of motility of H. pylori is a prokaryotic flagellum attached to the back of the bacterium that rigidly rotates like a propeller on a ship. The flagellum is composed of proteins and is approximately 40.0 nm in diameter and can reach rotation speeds as high as 1.50 x 103 rpm. If the speed of the bacterium is 10.0 μm/s, how far has it moved in the time it takes the flagellum to rotate through an angular displacement of 5.00 * 10² rad? Zina Deretsky, National Science Foundation/Flickr H. PYLORI CROSSING MUCUS LAYER OF STOMACH H.pylori Gastric Epithelial mucin cells gel Number i 318 Units um H.pylori…

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Chapter 1 Solutions

College Physics

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