In this overview, students examine and identify mannitol positive and mannitol negative bacteria on mannitol salt agar.

In this interactive object, learners examine the neuron pathway into and out of the spinal cord. They complete the activity by testing their knowledge of vocabulary and the location of spinal cord structures.

Learners complete a crossword puzzle with terms that relate to common diseases and disorders of the musculoskeletal system. Immediate feedback is provided. Learners have the option to send an e-mail to their instructors notifying them that the learning object has been completed.

In this colorful, interactive object, learners examine nervous and epithelial tissue composition and function. A quiz completes the activity.

In this animated object, learners examine processes that do not use ATP directly including hydrostatic pressure and facilitated diffusion with carrier proteins.

In this animated object, students observe how ATP energy is used to move substances across the cell membrane from an area of lower concentration to an area of higher concentration and when something too large needs to get in or out of a cell.

In this animated object, learners view molecules as they collide and move between two different solutions. They also observe what happens when the temperature of the solutions is raised or lowered.

In this animated and interactive object, learners conduct an experiment online to illustrate how a greater number of particles in a "vessel" increases osmotic pressure.

Explore what passive transport osmosis is and how it moves water through a semipermeable membrane.