Week 2 Summary - Brain and Behaviour (Biological aspects of psychology pt.1)
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Questions and Answers

Which part of the neuron carries signals away from the neuron to points where communication occurs with other neurons?

  • Axons (correct)
  • Cell body
  • Synapses
  • Dendrites

    • What are the fibres that receive signals from the axons of other neurons and carry those signals to the cell body called?

  • Synapses
  • Dendrites (correct)
  • Cell body
  • Axons

    • What are the tiny spaces between neurons called?

  • Cell body
  • Dendrites
  • Synapses (correct)
  • Axons

    • What is the semipermeable barrier of the neuron's membrane responsible for?

    <p>Keeping positively charged molecules from freely entering the axon</p> Signup and view all the answers

    What happens when the axon membrane becomes depolarized?

    <p>A gate (channel) opens</p> Signup and view all the answers

    What are the sudden wave of electrochemical changes called when they shoot down an axon?

    <p>Action potentials</p> Signup and view all the answers

    Do action potentials occur in dendrites?

    <p>Yes</p> Signup and view all the answers

    How many axons do neurons generally have?

    <p>One</p> Signup and view all the answers

    How many dendrites can a neuron have?

    <p>Many</p> Signup and view all the answers

    Is the firing of a neuron an all-or-none type of signal?

    <p>Yes</p> Signup and view all the answers

    Which part of the body is responsible for initiating reflexes without instruction from the brain?

    <p>The spinal cord</p> Signup and view all the answers

    What is the function of sensory neurons in the spinal cord?

    <p>They carry information toward the brain</p> Signup and view all the answers

    Which neurotransmitter is involved in muscle action and memory?

    <p>Acetylcholine</p> Signup and view all the answers

    Which neurotransmitter is involved in decreased anxiety and decreased tension?

    <p>GABA</p> Signup and view all the answers

    Which neurotransmitter is involved in increased pleasure and suppressed appetite?

    <p>Dopamine</p> Signup and view all the answers

    Which neurotransmitter is involved in increased learning and enhanced memory?

    <p>Glutamate</p> Signup and view all the answers

    Which neurotransmitter is involved in increased arousal and enhanced cognition?

    <p>Acetylcholine</p> Signup and view all the answers

    Which neurotransmitter is involved in modulated mood and suppressed appetite?

    <p>Serotonin</p> Signup and view all the answers

    Which part of the body is responsible for conveying information about an action's results back to the source of the action?

    <p>The spinal cord</p> Signup and view all the answers

    Which type of neurons carry information away from the brain?

    <p>The motor neurons</p> Signup and view all the answers

    Which division of the nervous system carries messages back and forth between the CNS and the body's organs and glands?

    <p>Autonomic Nervous System</p> Signup and view all the answers

    What change in the membrane potential of a postsynaptic cell will cause an excitatory postsynaptic potential (EPSP)?

    <p>Depolarization</p> Signup and view all the answers

    Which part of the neuron delivers signals across the synapse to dendrites of another neuron?

    <p>Axon</p> Signup and view all the answers

    What is the function of neurotransmitters?

    <p>Carry signals across the synapse to the postsynaptic cell</p> Signup and view all the answers

    What is the role of myelin in the speed of action potentials?

    <p>It speeds up action potentials</p> Signup and view all the answers

    What is the refractory period of a neuron?

    <p>The period of time when a neuron resets itself</p> Signup and view all the answers

    What is the function of the somatic nervous system?

    <p>Send movement instructions back to the muscles that move the skeleton</p> Signup and view all the answers

    What is the function of the sympathetic nervous system?

    <p>Mobilizes the body for action through the fight-or-flight response</p> Signup and view all the answers

    What is the function of the parasympathetic nervous system?

    <p>Slows organ and gland activity to conserve the body’s energy</p> Signup and view all the answers

    What is the function of dendrites in a neuron?

    <p>Receive signals from other neurons and transmit them to the cell body</p> Signup and view all the answers

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