â¢ The cell cycle is a series of events that takes. place from one cell division to the next. â¢ The time is takes to complete a cell cycle is. not the same in all cells.
A neuron is a nerve cell. The brain is made up of approximately 100 billion neurons. Neurons are similar to other cells in the body in some ways such as: Neurons are surrounded by a membrane. Neurons have a nucleus that contains genes. Neurons contain cytoplasm, mitochondria and other organelles.
1 They are stimulated by signals reaching them from Sensory neurons, other inter neurons or both. 2  It is estimated that human brain contains 100 billion inter neurons averaging 1000 synapses (or connection points) on each. 3  The term inter neuron encompasses a great variety of structural and functional types of cells.