QUESTION36: Which sequence of events best describes how a local potential is produced? Ligand-gated channels open and Na+ enters the cell. A stimulus is present (pain, temperature). Chemicals are released in response to the stimulus and attach to ligand-gated channels. The Na+ ion travels on the inside of the membrane to the trigger zone and forms a local potential. QUESTION37: Ascending tracts send signals from the point of stimulation to the brain via upper and lower motor neurons, decussating neurons, and chains of unmyelinated ventral motor neurons. QUESTION38: The body deals with stress (GAS). True.
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Which sequence of events best describes how a local potential is produced. 1.) Ligand-gated sodium channels open and Na+ enters the cell 2.) The Na+ ions travel on the inside of the membrane to the trigger zone and forms a local potential 3.) A stimulus is present (pain, temperature) 4.) Chemicals are released in response to a stimulus and attach to ligand-gated channels.
Adi S.
Based on the background information, which of the following is a mechanism by which an action potential is LEAST likely to occur in the associated postsynaptic neuron? Summation of ionic events [2 marks] A. Spatially from the glutamate-releasing neurons and other neurons releasing an excitatory neurotransmitter that acts via an indirect mechanism. B. Spatially from many postsynaptic neurons that release glutamate. C. Temporally from rapid stimulation of the presynaptic neurons that release glutamate. D. Spatially from the glutamate-releasing neurons and other neurons releasing the excitatory transmitter, aspartate. E. Spatially from the neurons releasing glutamate and other neurons releasing the inhibitory transmitter, GABA.
Maitreya E.
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