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.
The basic functional unit of the brain is the neuron, a special cell that sends electrochemical signals to other neurons (across a synaptic gap) and thereby creates those patterns that make up what we think of as the mind. The complexity of the task requires a fairly inconceivable 100 billion neurons, interconnected via trillions of synapses. A single firing neuron might communicate to thousands of others in a single moment. No computer comes close to the complexity of these communicating bits of organic matter. What's more, for each neuron there are some 10 to 50 glial cells providing structural support, protection, resources and more.