Examples of Neurotransmitters Released at Synaptic Terminals

🧠 Quick Study Guide

• 🧪 Neurotransmitters are chemical messengers that transmit signals across a synapse.
• 🧬 They are released from synaptic vesicles in the presynaptic neuron.
• ⚡️ The action potential triggers the influx of $Ca^{2+}$ ions, leading to neurotransmitter release.
• 🔑 Neurotransmitters bind to receptors on the postsynaptic neuron, causing either excitation or inhibition.
• 🚫 Excess neurotransmitters are removed from the synapse via reuptake, enzymatic degradation, or diffusion.
• 🎯 Key examples include Acetylcholine, Dopamine, Serotonin, GABA, and Glutamate.
• ⚖️ Imbalances in neurotransmitter levels can lead to neurological and psychiatric disorders.

Practice Quiz

1. Which neurotransmitter is primarily associated with muscle contraction and memory?
   1. Acetylcholine
   2. Dopamine
   3. Serotonin
   4. GABA
2. Which neurotransmitter is involved in reward, motivation, and motor control?
   1. Glutamate
   2. Dopamine
   3. Serotonin
   4. Norepinephrine
3. Which neurotransmitter is often linked to mood regulation, sleep, and appetite?
   1. GABA
   2. Glutamate
   3. Serotonin
   4. Acetylcholine
4. Which neurotransmitter is the primary inhibitory neurotransmitter in the brain?
   1. Glutamate
   2. Dopamine
   3. GABA
   4. Acetylcholine
5. Which neurotransmitter is the primary excitatory neurotransmitter in the brain?
   1. GABA
   2. Glutamate
   3. Serotonin
   4. Dopamine
6. What ion influx directly triggers neurotransmitter release from synaptic vesicles?
   1. $Na^+$
   2. $K^+$
   3. $Ca^{2+}$
   4. $Cl^-$
7. Which process removes neurotransmitters from the synaptic cleft?
   1. Exocytosis
   2. Endocytosis
   3. Reuptake
   4. Translation