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.
RIP. Chapter 49 Nervous Systems Multiple-Choice Questions. 1) Although an exact count is not available, it is likely that the human brain has as many as A) 10,000 neurons, B) 500,000 neurons, C) 1 million neurons, D) 10 million neurons, E) 100 billion neurons.Answer: E 2) The central nervous system is lacking in animals that have A) a complete gut.IP. Chapter 49 Nervous Systems Multiple-Choice Questions. 1) Although an exact count is not available, it is likely that the human brain has as many as A) 10,000 neurons, B) 500,000 neurons, C) 1 million neurons, D) 10 million neurons, E) 100 billion neurons.