While collective impact has a track record of success against a range of social and environmental issues, not all... This framework offers a guide to help your group of stakeholders assess whether or not collective impact is the right approach to address a specific social problem in your community....
Histology (Cells) of the Nervous System â¢ 2 major categories of cells are found in the nervous system:â¢ 1. Nerve cells (neurons) âcarry impulses and are electrically excitable.â¢ 2. Glial cells (neuroglia)- do not carry impulses, not electrically excitable.â¢ We will discuss glial cells first.â¢ Glial Cells (Neuroglia): These cells do not carry electrical impulses as they are not electrically excitable. There are several types of glial cells with a number of different functions.
At the majority of synapses, signals are sent from the axon of one neuron to a dendrite of another. There are, however, many exceptions to these rules: neurons that lack dendrites, neurons that have no axon, synapses that connect an axon to another axon or a dendrite to another dendrite, etc.f the voltage changes by a large enough amount, an all-or-none electrochemical pulse called an action potential is generated, which travels rapidly along the cell's axon, and activates synaptic connections with other cells when it arrives. Neurons do not undergo cell division.