Explain how neonicotinoids and cocaine alter synaptic signalling through effects on receptors or transmitter reuptake.
Tę umiejętność sprawdza 10 zadań wzorowanych na arkuszach IB z lat 2022–2025.
A neonicotinoid insecticide disrupts communication between neurons in an insect. What molecular interaction is responsible? A. Cleaving acetylcholine into glucose and phosphate B. Blocking protein synthesis in the insect’s bacterial symbionts C. Binding to…
A cocaine molecule binds to a dopamine transporter in a presynaptic membrane. Which immediate effect accounts for its influence on synaptic communication? A. Dopamine removal from the synaptic cleft is reduced B. Dopamine is converted directly into…
Two drug actions at synapses are summarized. Which interpretation is correct? A. Q fits cocaine because it seals every postsynaptic ion channel B. P fits neonicotinoids because it converts transmitter into protein C. P fits cocaine because it reduces…
Describe how neonicotinoids disrupt insect synaptic transmission.
A pharmacology seminar considers molecules that alter biological interactions. (a) Explain competitive enzyme inhibition using a named example. (b) Describe chemical synaptic transmission and ways external chemicals can alter it. (c) Discuss possible…
Neurons in a network communicate across chemical synapses. Explain how impulses are transmitted between neurons.
Chemical messengers mediate communication at synapses. Discuss how drugs can alter messenger release and reception at synapses.
Describe how stimulant drugs can affect nervous-system activity.
At which labelled site would a neonicotinoid act to disrupt transmission across this synapse? A. Site B B. Site D C. Site A D. Site C
An experimental antagonist occupies acetylcholine-binding sites without activating the receptors. What direct effect does this have at an excitatory cholinergic synapse? A. It increases acetylcholine binding at those occupied postsynaptic sites B. It prevents…
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