PSB01-15 - PSB3340 15 January 2008 cutaneous spacial...

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PSB3340 15 January 2008 cutaneous spacial discrimination - one-point discrimination sends one signal to the brain - two-point discrimination sends two signals to the brain Neural convergence: all neurons for one large area converge into one neuron--fine detail and  stimulation of two points is lost Cell body/soma: holds the nucleus (DNA), mitochondria (energy), ribosomes (produce  proteins), as well as other organelles - contains mechnisms for cell survival and function - nucleus: contains the nucleolus, which produces ribosomes that are responsible for protein  synthesis outside of the nucleus; contains chromosomes (DNA), which also produces the  mRNA - mRNA exits the nucleus, attaches to ribosomes, and produces proteins that do cellular  work, creating structure, or binding with membrane - Proteins do cellular work by giving structure or acting as enzymes (catalysts) to  control/influence reactions and neuron function activity - cytoplasm is the primary component of cells, including neurons - mitochondria produce energy used for normal cell function (use energy. produce adenosine  triphosphate, ATP) - Mitochondria were once thought to be separate organisms that were so efficient that it  became  permanent feature of the cell. mitochondria - have their own DNA, separate from nuclear DNA - inherited from mother; non-Mendelin inheritnce - thought to be encoded by nuclear DNA, but those genes are throught to have originally  come from mitochondrial DNA - mutations in mtDNA can have adverse effects, such as exercise intolerance endoplasmic reticulum: transports chemicls golgi apparatus: hormone construction; produces lysosomes, which break down unused  substances in the cell Dendrites accept signals from other neurons. - new data suggests that there are some areas along the dendrites that can send out signals, 
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This note was uploaded on 04/18/2008 for the course PSB 3340 taught by Professor Smith during the Spring '08 term at University of Florida.

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PSB01-15 - PSB3340 15 January 2008 cutaneous spacial...

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