For this question you will match the concepts with the effects.
1: Excitatory postsynaptic potentials (EPSPs)
2: Depolarization
3: The effect of EPSP's is:
4: Inhibitory postsynaptic potentials (IPSPs)
5: hyperpolarizations
6: The effect of IPSP's is:

Question

BlackTom AI · Accepted Answer

This matching question asks you to pair each concept with its corresponding effect.
Option A: 'allows chloride to enter' — This is characteristic of IPSPs, not EPSPs. Chloride influx typically hyperpolarizes the membrane, contributing to inhibitory signaling rather than excitation, so it belongs with IPSP-related mappings, not EPSP.
Option B: 'increases the likelihood of postsynaptic cell producing action potential' — This describes the classic excitatory effect of EPSPs, which bring the membrane potential closer to threshold and promote firing. It correctly aligns with EPSPs as the primary outcome of excitation.
Option C: 'lead to depolarization' — Depolarization is the hallmark effect of EPSPs, since Na+ influx or similar positive-charge movements reduce the membrane potential difference and move toward zero. This option captures the mechanical side of EPSP effects.
Option D: 'reduces the likelihood of postsynaptic cell producing action potential' — This is the key feature of IPSPs, which move the membrane potential away from threshold, making firing less probable. It does not describe EPSPs.
Option E: 'allows sodium to enter' — Sodium entry is a common mechanism underlying EPSPs, causing depolarization and increased excitability. This directly matches the excitatory process.
Option F: 'lead to hyperpolarization' — Hyperpolarization is the typical outcome of IPSPs when inhibitory neurotransmitters open channels for Cl− or K+, moving the potential further from threshold. This is not an EPSP effect.

Now, applying these distinctions to pairing the six items:
- 1: Excitatory postsynaptic potentials (EPSPs) should be matched with a result that reflects excitation. The most direct match is that EPSPs lead to depolarization. Therefore, 1 pairs with 'lead to depolarization' (Option C).
- 2: Depolarization is itself the effect of EPSPs, and it increases the likelihood of reaching the action potential threshold. The best match for this item is 'increases the likelihood of postsynaptic cell producing action potential' (Option B).
- 3: The effect of EPSP's is: The core excitatory consequence is that Na+ (and other cations) enter the cell to achieve depolarization. The most precise mechanism-listed option is 'allows sodium to enter' (Option E).
- 4: Inhibitory postsynaptic potentials (IPSPs) should be paired with an outcome that reduces excitability. The correct match is 'reduces the likelihood of postsynaptic cell producing action potential' (Option D).
- 5: Hyperpolarizations describe a state where the membrane potential becomes more negative, aligning with inhibitory signaling. The appropriate match is 'lead to hyperpolarization' (Option F).
- 6: The effect of IPSP's is: Since IPSPs cause inhibitory changes, a good match is 'allows chloride to enter' (Option A), which commonly mediates the hyperpolarizing effect of inhibitory inputs.

In summary, each option has been assigned to reflect the canonical physiological effects:
- EPSPs → lead to depolarization (Option C)
- Depolarization → increases the likelihood of producing an action potential (Option B)
- The effect of EPSP's is → allows sodium to enter (Option E)
- IPSPs → reduces the likelihood of producing an action potential (Option D)
- hyperpolarizations → lead to hyperpolarization (Option F)
- The effect of IPSP's is → allows chloride to enter (Option A)

W25 PSYC D024 01Z Intro Psychobiology Assignment #3: Cells of the Nervous System

For this question you will match the concepts with the effects. 1: Excitatory postsynaptic potentials (EPSPs) 2: Depolarization 3: The effect of EPSP's is: 4: Inhibitory postsynaptic potentials (IPSPs) 5: hyperpolarizations 6: The effect of IPSP's is:

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