Neurons, Synapses, & Signaling

Description

Mind Map on Neurons, Synapses, & Signaling, created by laurachavarry on 24/02/2015.
laurachavarry
Mind Map by laurachavarry, updated more than 1 year ago
laurachavarry
Created by laurachavarry almost 10 years ago
52
3

Resource summary

Neurons, Synapses, & Signaling
  1. Amino acids and amines
    1. neuropeptides
      1. relatively short chains of amino acids that serve as neurotransmitters that operate via metabotropic receptors.
      2. Glutamate
        1. the neurotransmitter at the neuromuscular junction. Is also an amino acid.
        2. dopamine
          1. an amine made from tyrosine. It affects sleep mood, attention, and learning.
          2. serotonin
            1. an amine made from tryptophan. It affects sleep, mood, attention, and learning.
            2. norepinephrine
              1. an amino acid made from tyrosine. Also is an excitatory neurotransmitter in the autonomic nervous system.
            3. Neuron Structure
              1. axon
                1. an extension that transmits signals to other cells. Axons are longer than dendrites.
                2. synapse
                  1. the branched end of an axon that transmits information to another cell at a junction.
                  2. dendrites
                    1. numerous highly branched extensions attached to the cell body
                    2. neurotransmitters
                      1. chemical messengers that pass information from the transmitting neuron to the receiving cell.
                    3. Neuron Communication
                      1. ligand-gated ion channel
                        1. the receptor protein that binds and responds to neurotransmitters. Binding to a particular part of the receptor opens the channel & allows specific ions to diffuse across the membrane.
                        2. excitatory postsynaptic potential (EPSP)
                          1. when the ligand-gated ion channel opens (and its permeable to both sodium and potassium), the membrane potential depolarizes. This brings the membrane potential to a threshold.
                          2. temporal summation
                            1. when 2 EPSPs occur at a single synapse in rapid succession that the neuron's membrane potential has not returned to resting potential before the arrival of the second EPSP.
                            2. spatial summation
                              1. EPSPs produced nearly simultaneously by different synapses on the same postsynaptic neuron can cause this.
                            3. Ion pumps
                              1. membrane potential
                                1. the charge difference, or voltage of energy in a cell
                                2. ion channels
                                  1. pores formed by clusters of specialized proteins that span the membrane
                                  2. sodium-potassium pump
                                    1. pump uses ATP hydrolysis to actively transport sodium out of the cell and potassium into the cell
                                  Show full summary Hide full summary

                                  Similar

                                  Light microscopes
                                  Jessica Phillips
                                  FLASHCARDS ABOUT DIGESTIVE SYSTEM
                                  Ahmed Almohammed
                                  Ecology
                                  R P
                                  AQA Biology 8.1 structure of DNA
                                  Charlotte Hewson
                                  BIOLOGY HL DEFINITIONS IB
                                  Luisa Mandacaru
                                  AS Biology Unit 1
                                  lilli.atkin
                                  Haemoglobin
                                  Elena Cade
                                  Food Chains and Food Webs Quiz
                                  Selam H
                                  Variation and evolution Quiz
                                  James Edwards22201
                                  Digestive System Flash Cards
                                  Ahmed Almohammed
                                  The structure of the Heart, AS Biology
                                  mill-bill