Reading a graph Student activity Play

Reading a graph Whiteboard exercise Play

Reagents, reactants and products Student activity Play

Refraction of light Student activity Play

Refraction of light Student activity Play

Refraction of plane waves Student activity Play

Refraction of plane waves Simulation Play

Regulation of blood calcium level Whiteboard exercise Play

Regulation of blood glucose concentration Slideshow Play

Regulation of blood glucose level by glucagon Animation Play

Regulation of blood glucose level by insulin Animation Play

Regulation of glucose level in the blood Class activity Play

Regulation of glucose level in the blood Whiteboard presentation Play

Regulation of volume of extracellular fluid Slideshow Play

Regulation of water balance in human Simulation Play

Regulation of water balance – the role of antidiuretic hormone Student activity Play

Regulation of water balance – the role of antidiuretic hormone Whiteboard exercise Play

Regulation of water loss in desert animals Whiteboard presentation Play

Regulation of water loss in desert animals Class activity Play

Relative molecular mass Student activity Play

Removing hardness from water Student activity Play

Removing hardness from water Whiteboard exercise Play

Removing permanent hardness of water Animation Play

Removing temporary hardness of water Animation Play

Renal mechanisms for conservng water Animation Play