EEOB 2520 Lecture Notes - Lecture 5: Vertebra, Histamine, Adrenal Gland
24 Feb 2017
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Not a single action potential > triggers many other to stop the distance problem. The one at rest can get to threshold more easily compared to the hyper-polarized because it has to go to rest before reaching threshold. Aids graded potential and blocks action potential. Faster conduction velocity (how fast we can get from one end of an axon to the other end) Graded potential faster than multiple action potential. Decreasing with distance but not as badly because the myelin is protecting it. Two types of input: likelihood of ap occurring. Temporal (time distortions): same pre, close in time. Spatial: different pre"s, at same time (close in space) Increase synapses = increases combos of summations = very quickly a highly complex system. Ca2+ availability (needed for exocytosis of neurotransmitters) We steal ca from our bones to make sure our nervous system has enough. Voltage across membrane (impacts reaching threshold potential) Links the nervous system and endocrine system.
