In this animated object, learners compare the mode of action of steroids with the action of amino acid-based hormones.
In this animated activity, learners examine muscle cell contraction and relaxation and consider the role of calcium ions.
In this animated object, learners examine the formation of ester bonds in the synthesis of lipids using triglyceride biosynthesis as an example. Ester bond formation is described as a dehydration synthesis reaction.
Learners read about the mutations that occurred in plants for the successful transition from an aquatic to a terrestrial existence. The classification of plants is based on these adaptive structures.
In this interactive object, learners read about the seven hormones that help regulate blood glucose. A quiz completes the activity.
Learners read descriptions of the actions of the superficial skeletal muscles and see their locations. A 61-question quiz completes the activity.
Learners read a description of torque and study the factors that cause its magnitude to change. A brief quiz completes the activity.
Learners view several movie clips that demonstrate the use of an indicator to follow the neutralization reaction that occurs when an acid and a base are mixed. Students test their knowledge in a series of questions. Immediate feedback is given.
Students examine atomic structure and the octet rule.
In this animated activity, learners explore three major methods of heat transfer and practice identifying each. This is the animated version with no audio.
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 read an introduction to protein structure and function.
In this animated object, learners examine the mechanisms for gas exchange among the lungs, blood, and tissues.
Chytrids, as members of this group are known, are found everywhere. In this animated learning object, students examine the role of chytrids and their impact on the environment.
In this interactive and animated object, learners examine the characteristics, ecological importance, and lifecycle of the ascomycetes of the fungi kingdom.
In this animated object, learners examine the chemistry behind table salt.
Learners examine how melting, vaporization, and sublimation require energy input while freezing and condensation release energy.
Learners examine phase diagrams that show the phases of solid, liquid, and gas as well as the triple point and critical point.
In this animated and interactive object, learners examine kinetic and potential energy as well as the first law of thermodynamics and the flow of energy between a system and its surroundings. Students also answer questions about exothermic and endothermic reactions
In this learning activity you'll explore the difference between mass and weight.
In this animated object, learners examine how thermal energy is transferred by conduction, convection, and radiation. A brief quiz completes the activity.
In this animated activity, learners view the pathways and functions of the fasciculus gracilis and the fasciculus cuneatus.
In this animated and interactive object, learners examine the location, structure, and function of the juxtaglomerular (JG) apparatus.
In this interactive object, students examine how the volume and temperature of an ideal gas relate under conditions of constant pressure and quantity.