What is the difference between exitatory and inhibitory neurotransmitters?

Neurotransmitters that influence the effect of other neurotransmitters when released at the same time are called: A) major neurotransmitters B) neuromodulators C) excitatory neurotransmitters D) inhibitory neurotransmitters

John Hughes and Hans Kosterlitz identified the endorphin receptor in frogs, and concluded that animals have a "built in" opioid system. To make sure that endorphins are truly neurochemicals, which of the following question should we ask these gentlemen? Please select all that apply.a) Are endorphins released in response to presynaptic depolarization? b) Do endorphins interact with postsynaptic receptors? c) Are endorphins found in presynaptic cells? d) Are endorphins subject to reuptake?

Which of the following is the role of axonal Calcium (Ca2+) channels in neuronal communication at the synapse? a) they inhibit the action potential causing it to stop b) Calcium channels have no role in this process c) by allowing calcium to exit the cell, they promote the propagation of action potential across the synapse by creating depolarization d) by blocking calcium entrance, they mediate the contraction of presynaptic axon to facilitate movement e) when they open, calcium enters the presynaptic terminal, promoting fusion of neurotransmitter vesicles with presynaptic membrane, and release of neurotransmitters to the synaptic cleft

what different types of neurotransmitters are there and their functions?

A neuron releases an excitatory neurotransmitter. Some neurons are stimulated and some are not. How is it possible that the same signal activates one neuron and not the other?

How is it possible for a particular neurotransmitterto produce opposite effects in different tissues?

1. If you block calcium channels on an axon, which will not occur? A) exocytosis of neurotransmitter B) repolarization phase of the action potential C) depolarization phase of the action potential D) hyperpolarization phase of the action potential E) graded potential

Give two mechanisms by which neurotransmitters exert their effects.

Which cell type is responsible for reuptaking neurotransmitters once released in the synapse? a) pyramidal cells b) ependymal cells c) glial cells d) oligodendrocytes The collective name for dopamine, serotonin and noradrenaline based on their chemistry is: a) cathecholamines b) indolamines c) neurotransmitters d) anxiolytics