Brain Facts Flashcards
How much water does the brain contain
75%
How many neurons in the human brain
100 Billion Neurons
How much does the human brain weigh
Approximately 1.2kgs or 2% of total body weight
What is the percentage of white matter and gray matter in the brain
60% White matter
40% Gray matter
How many Synapses per neuron
Anywhere from 1000 to 10,000 Synapses per Neuron
What is white matter made up of?
Dendrites and Axons, which create the network by which neurons send their signals.
Whats the largest part of the brain
Cerebrum makes 80% of brain weight
At early pregnancy whats the rate at which Neurons develop?
250,000 Neurons per minute
Does the Cerebral cortex grow?
Yes, cerebral cortex grows as you use it
Do New Neurons get made as you get older
Yes, with mental activity, new neurons gets made as we age
Whats the first sense to develop in the utero?
Sense of Touch. The Lips and Cheeks about 8 weeks and the rest of the body around 12 weeks
How much oxygen is used by the brain
20% of the total oxygen intake is used by the brain
How much blood is used by the brain
20% of the total blood circulated
How much wattage does your brain generate when awake
10 to 23 Watts, Enough to power a light bulb
How long can the brain live upto without oxygen
4 to 6 minutes and than begins to die. At 5 to 10 minutes there is permanent brain damage
Whats the 3 body plans for most multicellular organisms?
Radially symmetric organisms, Bilateral symmetry (99% of animals are Bilateral Symmetry), Spherical symmetry
Difference bettween Single cell Organism and Multi-Cellular Organism?
Single cell- Each individual cell has to carry out all the process to survive, where as multicell organisms have cells that depend on each other to survive
