MSN 671 FINAL ACTUAL 2025/2026 QUESTIONS AND 100% CORRECT ANSWERS

MSN 671 FINAL ACTUAL 2025/2026 QUESTIONS AND 100% CORRECT ANSWERS Classic synaptic neurotransmission - Answer -Action potential triggers neurotransmitter release into synapse. Action potential - Answer -Electrical signal traveling down the neuron. Calcium channels - Answer -Voltage-sensitive channels allowing Ca²⁺ entry. Exocytosis - Answer -Process of neurotransmitter release from vesicles. Neurotransmitters - Answer -Chemical messengers like dopamine and serotonin. Postsynaptic receptors - Answer -Bind neurotransmitters to initiate new signals. Ligand-gated ion channel - Answer -Opens upon neurotransmitter binding for ion flow. Voltage-sensitive ion channel - Answer -Opens due to electrical changes in neuron. Sodium-charged ion channel - Answer -Essential for neuronal depolarization during action potentials.Presynaptic transporter - Answer -Clears neurotransmitters from synaptic cleft. Norepinephrine - Answer -Regulates attention; low levels linked to ADHD. Acetylcholine - Answer -Important for memory; linked to Alzheimer's disease. Melatonin - Answer -Regulates circadian rhythm; synthesized in darkness. Serotonin - Answer -Modulates mood; deficiency linked to depression. Dopamine - Answer -Key for reward; linked to Parkinson's disease. GABA - Answer -Inhibitory n