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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Life: The Science of Biology
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- Lipids are transported from the intestine to the liver by (a) chylomicrons (b) HDLs (c) LDLs (d) glycerol transporters (e) leptinarrow_forwardDigestion of proteins starts and ends in what portion(s) of the body?arrow_forwardCarbohydrates and lipids are composed of the same chemical elements, but in different proportions. Both are used as energy sources for cell metabolism. Which type of molecule has the higher calorie content per gram. Explain..arrow_forward
- Unlike carbohydrates and fatty acids, protein shuld be supplied in regular basis. Why there is a need to supply protein more than the two macromolecules?arrow_forwardThe process of enzymatically breaking down large molecules intosmaller molecules that can be used by cells isa. absorption. .b. secretion. c. ingestion d. digestion. e. egestion.arrow_forwardDuring digestion, fructose is produced by the breakdown of larger molecules. Which type of molecule could be broken down to increase the body’s fructose levels?arrow_forward
- The term ____________________ refers to the sum total ofall the low-molecular-weight metabolite molecules producedby a cell.arrow_forwardWhy are amino acids such as arginine andhistidine required in relatively large amounts by children but insmaller amounts by adults? The adult human is not able to makethese amino acids.arrow_forwardWhich of the following is NOT a major source of protein? A. fish B. Milk C. Egg D. Ricearrow_forward
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