Life: The Science of Biology
Life: The Science of Biology
11th Edition
ISBN: 9781319010164
Author: David E. Sadava, David M. Hillis, H. Craig Heller, Sally D. Hacker
Publisher: W. H. Freeman
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Chapter 50.1, Problem 4R
Summary Introduction

To review:

The reason why food mixtures delivered into stomach by a food tube include proteins, but those delivered into the blood vessels do not.

Introduction:

The total parenteral nutrition (PN) is a method of feeding where a person is fed intravenously, bypassing normal eating and digestion process. A comatose patient is fed with nutrient mixtures via a food tube, which delivers nutrients into the stomach. However, for a patient with a non-functional gastrointestinal system, the nutrient mixture is delivered directly into the blood vessels.

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