Human Physiology: An Integrated Approach (7th Edition)
Human Physiology: An Integrated Approach (7th Edition)
7th Edition
ISBN: 9780321981226
Author: Dee Unglaub Silverthorn
Publisher: PEARSON
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Chapter 7, Problem 1CC

Name the membrane transport process by which glucose moves from the extracellular fluid into cells.

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Summary Introduction

To determine: The name of membrane transport process that is involved in the transport of glucose from extracellular fluid to cells.

Introduction: Transportation of substance is essential to maintain the metabolic process in the body. Transport of materials can take place along the concentration gradient, which is called as a passive process. The transport of materials can also take place against the concentration gradient, which is called as an active process.

Explanation of Solution

The name of membrane transport process that is involved in the movement of glucose from extracellular fluid to the cells is glucose transporter (GLUT). GLUT transporter is the facilitated membrane transport protein. It is a type of uniporter, which facilitates the transport of glucose in one direction only. There are seven isoforms of GLUT transporter in the human body. GLUT-1 is the most common isoform, which is involved in the transport of glucose.

GLUT transporter consists of 10 membrane spanning helices. In this, both amino and carboxyl-terminals are exposed to the plasma membrane. When glucose concentration is higher, the transport of glucose takes place along the concentration gradient. However, when the concentration of glucose decreases, the transport of glucose takes place against the concentration gradient.

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Students have asked these similar questions
Glucose transporters are either open to the extracellular side or open to the intracellular side of the membrane but never both at the same time. True or False? Movement of an ion against or up its concentration gradient is exergonic. True or False? If an amino acid is transported into intestinal epithelial cells through a transporter that is able to concentrate the amino acid using a sodium ion moving down its gradient, this transporter is an example of primary active transport. True or False? The maximum gradient a primary active transporter can build has a potential energy which in magnitude is greater than or equal to the magnitude of the energy released by ATP hydrolysis. True or False?
Movement of glucose from one side to the other side of the intestinal epithelium is a major example of transcellular transport. How does the Na+/K+ ATPase power the process? Why are tight junctions essential for the process? Why is localization of the transporters specifically in the apicalor basolateral membrane crucial for transcellular transport? Rehydration supplements such as sport drinks include a sugar and a salt. Why are both important to rehydration?
Glucose cannot enter easily inside the cell and require insulin to do so.What type of transport/movement does glucose exhibit?

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Human Physiology: An Integrated Approach (7th Edition)

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