Muscle Cell Contraction
By Barbara Liang
In this animated activity, learners examine muscle cell contraction and relaxation and consider the role of calcium ions.
The Neuromuscular Junction
In this animated object, learners examine the major events that occur at the neuromuscular junction.
Respiratory System Gas Exchange
By Bruce Forciea
In this animated object, learners examine the mechanisms for gas exchange among the lungs, blood, and tissues.
Protein Synthesis (Video)
By Becky Polk-Pohlman
In this video, you'll review how every protein molecule of an organism is synthesized.
The Autonomic Nervous System - Sympathetic Division
Learners examine the function and wiring of the sympathetic nervous system.
The Corticospinal Tracts
In this animated object, learners examine the major descending tracts of the nervous system. A matching exercise completes the activity.
The Juxtaglomerular Apparatus (Screencast)
In this animated and interactive object, learners examine the location, structure, and function of the juxtaglomerular (JG) apparatus.
The Upper and Lower Motor Neurons (Screencast)
In this screencast, learners examine the function and location of the motor neurons and the damage that can result when they are injured.
Antigen Presentation: T and B Cell Differentiation
By Carol Parent-Paulson
This learning object demonstrates the process by which antigens are identified, processed, and presented to mediators of the cellular immune system.
Biomolecules: The Carbohydrates (Video)
Viewers watch an introduction to monosaccharides, disaccharides, and polysaccharides. The processes for dehydration synthesis and hydrolysis.