Question 3 Select the incorrect statement about neuromodulators O they are secreted into a non-synaptic site O they are secreted by presynaptic neuron O they are smaller than neurotransmitters O they must bind to membrane receptors to invoke their action
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Step 1: Neuromodulators are secreted by presynaptic neurons. Show more…
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Choose the incorrect statement: a. Neurotransmitters diffuse across the myelin sheath. b. In an inhibitory synapse, the neurotransmitter makes it less likely that an action potential will be generated in the postsynaptic (after the synapse) neuron. c. Neurotransmitters are stored in synaptic vesicles. d. Most interneurons are found in the central nervous system.
'Which of the following is not correct about neurotransmitters? they are stored in vesicles after impulses are over they are broken down at the synapse they bind to a receptor on the receiving neuron they are stored in the cell body or soma of the neuron'
Snida M.
When an action potential reaches the axon terminal, most neurons release a chemical called a neurotransmitter. Which of the following statements regarding this process is INCORRECT? A. Ca2+ influx into the axon terminal results in fusion of the membranes of the synaptic vesicle and the neuronal cell membrane. B. Ca2+ influx into the axon terminal occurs by active transport of Ca2+ ions against its concentration gradient across the cell membrane. C. The process by which neurotransmitter release occurs from the axon terminal is exocytosis. D. An action potential reaching the axon terminal causes the opening of voltage-gated Ca2+ channels. E. Neurotransmitters are stored in synaptic vesicles in the axon terminal of the neuron.
Madhur L.
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