In this interactive object, students view an animated depiction of Class 1 levers. A matching quiz completes the activity.

By the end of this module, you'll be able to:

- Identify actions that can reduce biosecurity risk

- Develop a biosecurity action plan for a farm

- Select the most cost effective strategies

In this learning activity you'll review information on the neural synapse.

In this animated object, learners trace the olfactory pathway from the nasal cavity to the olfactory cortex.

In this screencast, you'll observe two vehicles moving across the screen at different rates then describe the motion. Additionally, you'll select the corresponding graphs of distance vs. time, velocity vs. time, and acceleration vs. time for each vehicle.

In this interactive learning object, learners study the parts of the brain and then test their knowledge in a drag-and-drop exercise.

In this colorful and interactive object, learners examine the structure and function of muscle and connective tissues. 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.

This animated object illustrates the events leading to the migration of phagocytes into areas of tissue damage and/or bacterial presence. Learners view bacterial cell phagocytosis, its subsequent enzymatic digestion, and exocytosis.

In this animated object, learners examine the different phases of a cell's life.

In this animated and interactive object, learners examine the red blood cell's life cycle and function. A brief exercise completes the activity.

In this animated object, learners examine how gas volume varies directly with absolute temperature (K at constant pressure). An example of a sample of gas at two conditions of volume and temperature is used to illustrate the law.

In this interactive object, learners identify charges on ions, write new formulas based on charge, and balance equations using coefficients.

Learners examine the meaning of oxidation, reduction, and half-reaction, and watch a film showing the deposition of copper metal from the reduction of copper (II) ion by aluminum. A brief quiz completes the activity.

Learners quiz themselves on the conversion factors within and between the metric, apothecary, and household systems.

In this screencast, learners categorize different metabolic activities as catabolic or anabolic and follow a glucose molecule through the processes of glycolysis, aerobic respiration, and fermentation.

In this animated activity, sexual reproduction in animals is contrasted with the alternation of generation lifecycle of plants.

In this animated object, students are introduced to moles as a measurement.

Learners review a graphic summary of the three series of reactions that occur during cellular respiration and the net energy (ATP) yield of that process.

Learners convert units used to designate pressure. Units for pressure are atm, mm Hg, torr, and pascal.

Learners examine the location, structure, and function of the unipolar and multipolar neurons.

Learners examine how vapor pressure is calculated. The vapor pressure of a liquid increases with increasing temperature. If the heat of vaporization and the vapor pressure at one temperature are known, the vapor pressure at a second temperature can be calculated.

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

In this screencast, learners examine the function and location of the motor neurons and the damage that can result when they are injured.

Learners examine phase diagrams that show the phases of solid, liquid, and gas as well as the triple point and critical point.