Axon terminal and synapseतंत्रिकाक्ष अंतस्थ और सिनैप्स

NCERT Fig 18.3 · interactive diagram

Parts and their functions

• Axon terminal (तंत्रिकाक्ष अंतस्थ) — Pre-synaptic knob of the first neuron.
• Synaptic vesicles (सिनैप्टिक पुटिकाएँ) — Store neurotransmitters; fuse with the membrane when an impulse arrives.
• Mitochondrion (माइटोकॉन्ड्रिया) — Supplies ATP for transmitter release.
• Neurotransmitter (न्यूरोट्रांसमीटर) — Released into the cleft by exocytosis (e.g., acetylcholine).
• Synaptic cleft (सिनैप्टिक दरार) — Fluid-filled gap between pre- and post-synaptic membranes.
• Receptors (ग्राही) — Specific proteins that bind the transmitter and open ion channels.
• Post-synaptic membrane (पश्च-सिनैप्टिक झिल्ली) — New potential (excitatory or inhibitory) develops here.
• Impulse arrives (आवेग आता) — The action potential reaches the axon terminal.

Original diagram drawn by Simple Learning Hub, based on NCERT Fig 18.3. Report a mistake