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Property Organism Value Units ID Details
Percent of total serotonin produced in enterochromaffin cells Various 90 Percent 102687 Indiana University school...
Number of presynaptic calcium channels open for each vesicle that is released Rat Rattus norvegicus 60 Unitless 103550 Borst, J.G.G. & Sakmann...
Influx of Ca2+ triggerred by presynaptic action potential Rat Rattus norvegicus 12000 Ca2+/vesicle released 108626 Attwell D, Laughlin SB....
Expansion in the size of the brain relative to the body in humans compared to lower primates Human Homo sapiens 3 fold expansion 111648 Harris JJ, Jolivet R...
Comparison of white matter to gray matter in brain Unspecified energy use: white matter is 3-fold lower than gray matter: density of synapses: 80 fold lower N/A 111650 Harris JJ, Jolivet R...
Fraction of total body serotonin that is released into the gut by intestinal enterochromaffin cells Unspecified ~95 % 113115 Berger M, Gray JA, Roth...
Diameter of axon above which the great majority of axons are myelinated Metazoa animals >0.3 µm 110609 Harvey A. Swadlow and...
Conduction velocities of impulse between corticospinal tract and brainstem Monkey ≤110 m/sec 110612 Harvey A. Swadlow and...
Volume of neuron soma, nucleus & nucleolus Guinea Pig Cavia porcellus cell body 12,260µm^3: nucleus 1,660µm^3: nucleolus 25.6µm^3 µm^3 112112 Edstrom JE. Effects of...
Rate of transport of amino acid in the fast component Rat Rattus norvegicus 240 - 420 mm/day 112229 Vahlsing HL, Hirschl RB...
Distance of individual neuron from a brain capillary Rat Rattus norvegicus rarely >8–20 µm 117110 Abbott NJ, Rönnbäck L...
Halflife of sodium channel Mammals in cultured mouse neuroblastoma cells ~1 day: in rabbit Schwann cells in vitro 2 days days 114486 Hildebrand C, Remahl S...
Axonal action potential properties from recent studies of cell types in three major brain regions Mammals Table - link N/A 111176 Kress GJ, Mennerick S....
Duration of synaptic formation in cultured neurons Rat Rattus norvegicus <60 min 112035 Hopf FW, Waters J, Mehta S...
Number of calcium ions required to release neurotransmitter vesicle at presynaptic cleft vertebrates 200-13,000 Calcium ions/released vesicle 103549 Laughlin SB, de Ruyter...
GABA concentration in brain Unspecified 1 mM 115055 Krnjević, K. "Chemical...
Typical synaptic cleft distance Unspecified 20-40 nm 100721 http://faculty.washi...
Axon diameter in the optic nerve North American opossum Didelphis virginiana myelinated 0.3-6.7µm (mean 1.6µm): unmyelinated 0.2-1.6µm (mean 0.6µm) µm 112118 Kirby MA, Clift-Forsberg L...
Average dimensions of neuronal soma of trigeminal mesencephalic nucleus in adult Syrian Hamster Mesocricetus auratus diameter 34.1µm: surface area 3,651µm^2: cytoplasmic volume 20,569µm^3 N/A 112113 Alley KE. Morphogenesis...
Number of neurons in larval brain of Drosophila Fruit fly Drosophila melanogaster 10,000-15,000 neurons 101672 Scott et al. A Chemosensory...