You need Adobe Flash Player and Adobe Shockwave Player to view these animations.

6.1: Tutorial: Active versus passive movement of molecules

This tutorial explains how cells use active and passive transport to move materials across the plasma membrane.

6.2: Activity: Water gain and loss in plant and animal cells

Manipulate the slider to see what happens to a cell as changes occur in the concentration of dissolved materials outside of the cell.

6.4: Tutorial: Signaling molecules

This tutorial explores how specialized proteins, called enzymes, speed up chemical reactions.

6.1: Process Animation: Active Transport

» View animation

6.2a: Process Animation: Exocytosis

» View animation

6.2b: Process Animation: Endocytosis

» View animation

6.3: Process Animation: Signaling molecules

» View animation

6.4: Process Animation: A Cell's Response to a Steroid Hormone

» View animation

Links

Norton Website
College Books
Professional Books
Trade Books
Help Desk

About W. W. Norton

W. W. Norton & Company has been independent since its founding in 1923, when William Warder Norton and Margaret D. Norton first published lectures delivered at the People's Institute, the adult education division of New York City's Cooper Union. The Nortons soon expanded their program beyond the Institute, publishing books by celebrated academics from America and abroad. By mid-century, the two major pillars of Norton's publishing program—trade books and college texts—were firmly established. In the 1950s, the Norton family transferred control of the company to its employees, and today—with a staff of 400 and a comparable number of trade, college, and professional titles published each year—W. W. Norton & Company stands as the largest and oldest publishing house owned wholly by its employees.