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Which of the following describes temporal summation? Two pre-synaptic cells send alternating signals to depolarize and then hyperpolarize. Two pre-synaptic cells send simultaneous signals to hyperpolarize. One pre-synaptic cell sends a signal to depolarize and another cell simultaneously sends a signal to hyperpolarize. One presynaptic cell sends a repeated signal to depolarize. Two pre-synaptic cells send simultaneous signals to depolarize.

Which of the following describes temporal summation? Two pre-synaptic cells send alternating signals to depolarize and then hyperpolarize. Two pre-synaptic cells send simultaneous signals to hyperpolarize. One pre-synaptic cell sends a signal to depolarize and another cell simultaneously sends a signal to hyperpolarize. One presynaptic cell sends a repeated signal to depolarize. Two pre-synaptic cells send simultaneous signals to depolarize.

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
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Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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--- ### Understanding Temporal Summation in Neural Activity --- **Quiz Question:** Which of the following describes temporal summation? - ○ Two pre-synaptic cells send alternating signals to depolarize and then hyperpolarize. - ○ Two pre-synaptic cells send simultaneous signals to hyperpolarize. - ○ One pre-synaptic cell sends a signal to depolarize and another cell simultaneously sends a signal to hyperpolarize. - ○ One presynaptic cell sends a repeated signal to depolarize. - ○ Two pre-synaptic cells send simultaneous signals to depolarize. **Explanation:** In neuroscience, temporal summation occurs when one presynaptic cell fires multiple action potentials in a short period of time, leading to the buildup of excitatory postsynaptic potentials (EPSPs) or inhibitory postsynaptic potentials (IPSPs). This can cause the postsynaptic cell to reach the threshold for firing an action potential if the repeated signals are excitatory. In this context, the option "One presynaptic cell sends a repeated signal to depolarize" correctly describes temporal summation. This means that a single neuron's rapid sequence of signals can sufficiently add up to trigger a significant response in the postsynaptic neuron. Remember, in contrast, spatial summation involves simultaneous signals from multiple presynaptic cells converging on a single postsynaptic cell. ---
Transcribed Image Text:--- ### Understanding Temporal Summation in Neural Activity --- **Quiz Question:** Which of the following describes temporal summation? - ○ Two pre-synaptic cells send alternating signals to depolarize and then hyperpolarize. - ○ Two pre-synaptic cells send simultaneous signals to hyperpolarize. - ○ One pre-synaptic cell sends a signal to depolarize and another cell simultaneously sends a signal to hyperpolarize. - ○ One presynaptic cell sends a repeated signal to depolarize. - ○ Two pre-synaptic cells send simultaneous signals to depolarize. **Explanation:** In neuroscience, temporal summation occurs when one presynaptic cell fires multiple action potentials in a short period of time, leading to the buildup of excitatory postsynaptic potentials (EPSPs) or inhibitory postsynaptic potentials (IPSPs). This can cause the postsynaptic cell to reach the threshold for firing an action potential if the repeated signals are excitatory. In this context, the option "One presynaptic cell sends a repeated signal to depolarize" correctly describes temporal summation. This means that a single neuron's rapid sequence of signals can sufficiently add up to trigger a significant response in the postsynaptic neuron. Remember, in contrast, spatial summation involves simultaneous signals from multiple presynaptic cells converging on a single postsynaptic cell. ---
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