Describe how synaptic signaling is influenced by the action of tranquilizers (such as Valium®) compared to the effects of antidepressants (such as Prozac®)
What will be an ideal response?
Tranquilizers promote inhibitory signaling at the synapse. They do this by making GABA-gated channels open more easily in response to the inhibitory neurotransmitter GABA. This channel, when open, allows Cl–to flow into the neuron, making the cell more difficult to depolarize. Antidepressants are used to enhance the neuronal signaling in neurons that have serotonin receptors. Prozac® specifically blocks the reuptake of serotonin in the synaptic cleft. This results in a net increase in serotonin available for excitatory signaling to the postsynaptic neuron.
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Think of a marine organism that you are familiar with and describe all aspects of its niche, including both biotic and abiotic characteristics of the niche
What will be an ideal response?
Although insects and birds both have wings, the structures do not come from the same lineage and these species do not share a common ancestor. This would be an example of ______.
a. a homologous structure b. a vestigial structure c. an analogous structure d. none of the above
Four of the five choices listed below are
characteristics of ethylene. Select the exception. a. levels increase in stressed plants b. promotes fruit ripening c. triggers cell division d. is a gas e. promotes abscission
In an ecosystem
A. both energy and nutrients cycle. B. energy flows and nutrients cycle. C. energy cycles and nutrients flow. D. both energy and nutrients flow. E. energy is contained with nutrient cycles.