Neurons send electrical signals throughout a body based on chemical communication. Individuals stimulate a neuron to see the effects. They notice the sodium-potassium channels along with ions, concentrations, and a membrane potential...

In this sentence completion worksheet, students fill in the blank for the correct words for each sentence. Students complete 10 multiple choice questions. Click on "show all" to see the rest of the worksheet.

Test your skill at reading the emotion expressed in a face in these two matching games.

Are facial expressions learned or innate? [2:58]