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@rosanyalex: Girls vanity #tiktokshopblackfriday #tiktokshopcybermonday #toys #toddlergirl #toddlermoms @GARVEE @Garvee Commercial

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Tuesday 25 November 2025 23:01:26 GMT
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🔥 BRAIN CHEMISTRY: Acetylcholine, Calcium & Synapses Explained! 1️⃣ What is Acetylcholine (ACh)? - First neurotransmitter ever discovered (Otto Loewi, 1921). - Key roles: - Muscle contraction 💪 (activates motor neurons). - Memory & learning � (hippocampus). - Attention & focus 🎯 (linked to Alzheimer’s if deficient). - Parasympathetic nervous system (rest/digest mode). 2️⃣ How Does ACh Work? - Step 1: ACh is released from synaptic vesicles into the synapse (gap between neurons). - Step 2: Binds to ACh receptors (nicotinic or muscarinic). - Step 3: Triggers action potential (electrical signal) in the next neuron/muscle. - Step 4: Acetylcholinesterase enzyme breaks it down to reset the system. 3️⃣ Calcium’s CRUCIAL Role - Voltage-gated calcium channels open when a neuron fires. - Calcium influx triggers synaptic vesicles to release ACh (exocytosis). - No calcium = no neurotransmitter release! 🚫⚡ 4️⃣ Fun Facts (TikTok Hook!) - Botulinum toxin (Botox) blocks ACh → paralyzes muscles 😵. - Nicotine mimics ACh → hijacks receptors (why it’s addictive). - Nerve gases inhibit ACh breakdown → nonstop muscle spasms 💀. 5️⃣ Why Should You Care? - Alzheimer’s drugs boost ACh to slow memory loss. - Myasthenia gravis (autoimmune attack on ACh receptors) causes muscle weakness. - Every thought, movement, and heartbeat relies on this system! #Neuroscience #BrainTok 😎neuroscience #fyp #biology #neuroscience #neuron
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