In an interactive exercise, learners identify the human body sites that harbor a normal resident flora and the sites that are sterile.

In this interactive object, learners read the definitions of the parts of a cell and assemble a basic eukaryotic cell in a drag and drop exercise. A matching quiz involving cell terms and their definitions completes the activity.

Learners view video clips demonstrating Gram's staining procedure. Correctly stained slides are shown.

Learners view video clips demonstrating acid-fast staining procedures. Correctly stained slides are shown. The learning object includes two matching exercises.

In this learning activity you'll evaluate the immune response including active, passive, natural, and artificial immunity.

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 learning activity you'll investigate the interaction of antimicrobial therapies and host defenses in eliminating an infection.

The student categorizes defense mechanisms as specific or non-specific.

In this screencast, learners read how microbes in such items as yogurt, bread, insulin, and insect sprays improve our lives.

In this learning activity you'll assembles parts of a virus and match virus terms and descriptions.

Students read a description of audiograms. They review audiograms representing various degrees and types of hearing loss.

In this learning activity you'll assemble the components of a prokaryotic cell and match the names and functions with each structure.

In this learning activity you'll analyze the basic steps in conjugation and applies the effect to microbial characteristics.

Learners match the names of parasitic organisms to the diseases they cause and the modes of transmission.

Learners test their knowledge of fungal diseases by completing six exercises.

Learners complete two exercises. In the first quiz, they divide viruses into two categories: RNA and DNA. They later match each virus with the disease it causes.

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

Learners read about endospores and view video clips demonstrating spore staining procedures. Correctly stained slides are shown.

In this learning activity you'll make observations and formulate an evaluation including diagnosis and microorganism identification.

Learners read about audiological tests including pure tone testing, air conduction, bone conduction, Speech Reception Threshold, and Speech Discrimination Score. They listen to sounds and words recorded at different decibel levels and see a graphic representation of decibel ranges. A brief review concludes the activity.

Students make observations and formulate an evaluation that includes diagnosis and microorganism identification and treatment.

Learners match diseases with their portals of entry, causative agents, and associated vectors.

In this learning activity you'll observe information and formulate an evaluation that includes diagnosis and microorganism identification.

In this interactive object, learners match the bacterial etiologic agent to the disease it causes.

Learners watch a brief video clip. They then follow step-by-step instructions on how to do a urine colony count and examine the criteria for determining if a colony count represents an infection. A brief quiz completes the object.