Types of Synapses in Neurons Quiz
18 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What type of synapse allows free movement of ions between neurons through small protein tubular structures called gap junctions?

  • Axonal synapse
  • Chemical synapse
  • Electrical synapse (correct)
  • Neurotransmitter synapse

    • In chemical synapses, the first neuron secretes a chemical substance called a neurotransmitter into a gap known as the:

  • Communication cleft
  • Neuronal cleft
  • Synaptic gap (correct)
  • Neurotransmitter cleft

    • Which synapse type can transmit signals more slowly but allows for both excitatory and inhibitory actions?

  • Biological synapse
  • Polarizing synapse
  • Chemical synapse (correct)
  • Depolarizing synapse

    • What is the part of a neuron conducting an action potential towards another neuron called?

    <p>Presynaptic neuron</p> Signup and view all the answers

    Which synapse is associated with complex human behaviors such as learning and memory?

    <p>Chemical synapse</p> Signup and view all the answers

    What structure in a presynaptic neuron is filled with neurotransmitters and releases them into the synaptic cleft during signal transmission?

    <p>Neurotransmitter vesicle</p> Signup and view all the answers

    What is synaptic potentiation?

    <p>The production of larger-than-expected postsynaptic potentials due to repeated use of a synapse</p> Signup and view all the answers

    How do chemically gated channels (NMDA receptors) contribute to synaptic potentiation?

    <p>They allow Ca2+ entry which activates kinase enzymes promoting more effective responses to subsequent stimuli</p> Signup and view all the answers

    What is the result of presynaptic inhibition?

    <p>Inhibition of excitatory neurotransmitter release from the presynaptic cell</p> Signup and view all the answers

    How are neurotransmitters classified based on their effects?

    <p>Excitatory or inhibitory and direct or indirect effects</p> Signup and view all the answers

    What distinguishes channel-linked receptors from G protein-linked receptors in terms of neurotransmitter action?

    <p>Channel-linked receptors mediate direct transmitter action and result in brief, localized changes; G protein-linked receptors mediate indirect action leading to slow and diffuse changes</p> Signup and view all the answers

    How many different neurotransmitters have been identified so far?

    <p>50</p> Signup and view all the answers

    What is the main function of an inhibitory postsynaptic potential (IPSP)?

    <p>Induce hyperpolarization and make the inside of the cell more negative</p> Signup and view all the answers

    What is the primary ion involved in inhibitory synapses?

    <p>Chloride (Cl-)</p> Signup and view all the answers

    What happens during temporal summation in synaptic transmission?

    <p>Multiple EPSPs add up over time to reach the threshold for firing</p> Signup and view all the answers

    How does spatial summation contribute to neuronal excitation?

    <p>Terminals spread over wide areas add up their effects until firing threshold is reached</p> Signup and view all the answers

    What does it mean when a neuron is 'facilitated'?

    <p>The membrane potential is close to the firing threshold, making excitation easier</p> Signup and view all the answers

    How does rapid rate of stimulation affect postsynaptic potential?

    <p>It increases the postsynaptic potential</p> Signup and view all the answers

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser