Purchase Solution

A post synaptic ionotropic receptor permeant to only one ion is known to be inhibitory...

Not what you're looking for?

Ask Custom Question

A post synaptic ionotropic receptor permeant to only one ion is known to be inhibitory (Activation of the receptor generates an APSP)

Chloride is able to pass through this ion channel.

What would happen if this neuron was suddenly made permeable to Mg ions, would Mg ions flow into or out of the cell?

Would the current flow due to Mg serve to depolarize or hyperpolarize the membrane?

Please explain I am confused.

Purchase this Solution
Solution Preview

Normally, Cl- concentration is higher outside the cell than inside. Therefore, when the Cl- channel opens, Cl- flows into the cell. When chloride ions flow into the neuron, the inside of the cell becomes more negative since chloride is an anion -- a negatively charged ion.

As the inside of the membrane becomes more negative, the resting membrane potential, normally around -70 mV, becomes more negative, e.g. -90 mV. Therefore, when Cl- moves into the cell, the effect is ...

Purchase this Solution
Free BrainMass Quizzes
Light and Sight Vocabulary

This quiz introduces basic definitions of vocabulary related to light and how human eyes. This information is important for an understanding of sight.

Pregnancy Knowledge

How much do you know about being pregnant? Test your Pregnancy IQ with this quiz!

Do You Know Your Macromolecules?

This quiz will assess your knowledge of the macromolecules that are important to living things.

Parts of the Brain

This quiz will test your knowledge on different areas of the brain.

How Much Do You Know About Genetic Inheritance?

Most of us studied the basics of dominant and recessive genes at some point. However, genetics are much more complicated than this. How far beyond the basics does your knowledge go?

View More Free Quizzes
Related BrainMass Solutions

  • Ion channel Study Guide

    43080 Ion channel Study Guide A Post synaptic ionotropic receptor permenant to only one ion is known to be inhibitory (Activation of the receptor generates an IPSP).

  • Neuron Bathed in Muscimol & Baclofen

    ., what is happening at the synapse? Why is one type of GABA agonist more effective than the other?) Explain how each receptor functions to affect synaptic activity.

  • Ionotropic vs Metabotropic Receptors & 2nd Messenger System

    , would only be able to activate a specific set of icons (receptors).

  • EPSP/IPSP

    In other words, ion channels open in response to neurotransmitter binding to a receptor in the post synaptic cell. For example, acetylcholine (ACh) is an excitatory neurotransmitter at neuromuscular junctions.

  • Different Classes of Neurotransmitters

    So far three general classes of GABA receptor are known, more than one of which is often represented in the same organisms.

  • Cell Biology

    Explain why the coupling of the import of amino acids or sugars into cells is typically linked to Na+ ion import. 2. What happens to the post-synaptic cells' membrane potential at an inhibitory synapse? 3.

  • Factors Affecting Action Potentials

    What determines whether or not a post-synaptic neuron will fire an action potential when it receives both excitatory and inhibitory input? Inhibitory signals are called IPSPs (inhibitory post-synaptic potentials).

  • Mechanisms and Enzymes - Synaptic cleft & Neurotransmitters

    Ionotropic receptors are ligand-gated ion channels that open or close through neurotransmitter binding. Metabotropic receptor, which can have a diverse range of effects on a cell, transduct the signal by second messenger systems.

  • Process from Action Potential to Release of Neurotransmitter

    The action that follows activation of a receptor site may be either depolarization (an excitatory post-synaptic potential) or hyperpolarization (an inhibitory post-synaptic potential).

View More Related Solutions