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Questions and Answers
What is the primary function of astrocytes?
What is the primary function of astrocytes?
- Physically support neurons and regulate extracellular fluid in CNS (correct)
- Line cavities in the CNS
- Form myelin sheaths around axons in CNS
- Phagocytic cells
What is the purpose of the sodium-potassium pumps?
What is the purpose of the sodium-potassium pumps?
- To generate neurotransmitters
- To facilitate graded potentials
- To propagate action potentials
- To maintain the resting potential of the neuron (correct)
What happens when the membrane potential becomes less negative than the resting potential?
What happens when the membrane potential becomes less negative than the resting potential?
- The membrane is refractory
- The membrane is at rest
- The membrane is depolarized (correct)
- The membrane is hyperpolarized
What is the term for the process of summing incoming signals in a neuron?
What is the term for the process of summing incoming signals in a neuron?
What is the function of nodes of Ranvier?
What is the function of nodes of Ranvier?
What is the term for the wave of depolarization that moves down the axon?
What is the term for the wave of depolarization that moves down the axon?
What is the role of neurotransmitters in synaptic transmission?
What is the role of neurotransmitters in synaptic transmission?
What is the term for the period during which the axon cannot transmit another action potential?
What is the term for the period during which the axon cannot transmit another action potential?
What is the function of microglia?
What is the function of microglia?
What is the term for the local response that varies in magnitude depending on the strength of the applied stimulus?
What is the term for the local response that varies in magnitude depending on the strength of the applied stimulus?
What is the first step in the neural signaling process?
What is the first step in the neural signaling process?
What type of neuron transmits information from the central nervous system to other neurons or effectors?
What type of neuron transmits information from the central nervous system to other neurons or effectors?
What is the function of the myelin sheath?
What is the function of the myelin sheath?
What is the term for the gaps in the myelin sheath between successive Schwann cells?
What is the term for the gaps in the myelin sheath between successive Schwann cells?
What is the function of glial cells in the nervous system?
What is the function of glial cells in the nervous system?
What is the term for a mass of neuron cell bodies in the peripheral nervous system?
What is the term for a mass of neuron cell bodies in the peripheral nervous system?
What happens to incoming neural signals during integration?
What happens to incoming neural signals during integration?
What is the function of dendrites in a neuron?
What is the function of dendrites in a neuron?
What is the term for several hundred axons wrapped in connective tissue?
What is the term for several hundred axons wrapped in connective tissue?
What is the result of temporal and spatial summation?
What is the result of temporal and spatial summation?
What is the role of interneurons in the central nervous system?
What is the role of interneurons in the central nervous system?
What is the term for when a single neuron is affected by converging signals from two or more presynaptic neurons?
What is the term for when a single neuron is affected by converging signals from two or more presynaptic neurons?
What is the last step in the neural signaling process?
What is the last step in the neural signaling process?
What allows the CNS to integrate incoming information from various sources?
What allows the CNS to integrate incoming information from various sources?
What is the term for when a single presynaptic neuron stimulates many postsynaptic neurons?
What is the term for when a single presynaptic neuron stimulates many postsynaptic neurons?
What is the function of reverberating circuits?
What is the function of reverberating circuits?
What is a characteristic of reverberating circuits?
What is a characteristic of reverberating circuits?
What happens in reverberating circuits until synapses fatigue?
What happens in reverberating circuits until synapses fatigue?
What is an important function of complex neural circuits?
What is an important function of complex neural circuits?
What is a characteristic of complex neural circuits?
What is a characteristic of complex neural circuits?
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