Traditional lap pools are about 10 feet wide, though widths between 8 and 10 feet are common. (In competition pools, swim lanes are 2.5 meters wide, or about 8.2 feet.) You don't want to go too narrow with a lap pool.
The number of neurons in the brain varies dramatically from species to species. One estimate (published in 1988) puts the human brain at about 100 billion (10 11) neurons and 100 trillion (10 14) synapses.
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.