Teacher Demo/Student Activity: Limit to Cell Size

41800307 - main blood cells in scale isolated on white background

41800307 – main blood cells in scale isolated on white background

Introduction 

Cells require a constant supply of glucose and oxygen to produce energy.  Cellular respiration occurs in the mitochondria of a cell. As a result of this process, large quantities of waste carbon dioxide must be expelled from the cell. All materials involved in this reaction are either imported or exported through the cell membrane by diffusion.

Students observe the effect of cell volume and surface area on the extent of diffusion of the sodium hydroxide solution through the “cell”.

teacher-demo-student-activity-limit-to-cell-size

The Inner Life of a Cell

Harvard University selected XVIVO to develop an animation that would take their cellular biology students on a journey through the microscopic world of a cell, illustrating mechanisms that allow a white blood cell to sense its surroundings and respond to an external stimulus. This award winning piece was the first topic in a series of animations XVIVO is creating for Harvard’s educational website BioVisions at Harvard.
http://www.xvivo.net
http://multimedia.mcb.harvard.edu/

Can Radiation Give You Superpowers?

The Thing, Human Torch, Invisible Woman and Mister Fantastic are back this summer! In the new reboot, the team gets its powers while in an alternate dimension. Here at Reactions, though, we stick to comic book canon. In this week’s video, we explain the original way the Fantastic Four got their power – radiation – with help from SciPop Talks.