Biology (11th Edition)

Published by McGraw-Hill Education
ISBN 10: 1-25918-813-2
ISBN 13: 978-1-25918-813-8

Chapter 5 - Membranes - Review Questions - Synthesize: 1


Humans and mice are endothermic/warm blooded, and so they have a similar body temperature around 37 degrees C. Clearly their lipids can move freely when the cells are fused, and this movement is passive, since inhibiting ATP/energy use makes no difference. What does inhibit movement is 4 degrees C, which would cause the membrane to freeze solid.

Work Step by Step

To figure out this question, first consider the course of the cells and the temperatures used--37 degrees C is normal for humans and, probably, for other warm-blooded mammals, such as mice. Then consider the non-effect of ATP--which is looking at energy use to move lipids. Energy is not needed, so movement is passive. Finally, lower temperature, which would freeze a membrane designed to work at warm body temperature, stops movement.
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.