The post-synaptic membrane of a nerve may be stimulated by certain neurotransmitters to permit the influx of negative chloride ions into the cell. This process will result in:
Correct answer: C. Production of an IPSP
- A. Membrane depolarisation
- B. An action potential
- C. Production of an IPSP
- D. Production of an EPSP
Explanation
Membrane depolarization refers to a change in the electrical charge across the cell membrane of a neuron or muscle cell, resulting in a more positive charge inside the cell than outside. An action potential is a brief, rapid change in the electrical potential across the membrane of a nerve cell or muscle cell. It is the fundamental unit of communication in the nervous system, allowing neurons to transmit signals over long distances. At the inhibitory synapse, the arrival of neurotransmitters at the postsynaptic membrane causes the entry of chloride ions and the efflux of potassium ions. The interior of the postsynaptic neuron becomes more negative, and the passage of an action potential is inhibited. This increased negativity is called an inhibitory postsynaptic potential. An EPSP, or excitatory postsynaptic potential, is a type of change in the electrical potential of a neuron that makes it more likely to generate an action potential. It occurs when excitatory neurotransmitters are released from presynaptic neurons and bind to specific receptors on the postsynaptic neuron, causing a depolarization of the membrane potential.
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About Coordination and Control
Coordination depends on receptors, neurons, synapses and nerve impulses, with reflex actions traced through the reflex arc and the roles of major brain regions. Chemical coordination covers endocrine glands and hormones, including how hormones regulate growth, metabolism, reproduction and internal balance, unlike rapid nervous control.
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