الحصة (6) - Integrated Science - الترم الثاني - الصف الأول الثانوي لغات

Lesson (6) – Nervous System, Nerve Impulse & Synapse | Integrated Science – Term 2 – Grade 10 🧠⚡

In this lesson, we study the Nervous system and its role in sensation and response. We explain the structure of the nerve cell, the generation and transmission of a nerve impulse, and the structure and function of the synapse (التشابك العصبي). The lesson helps students understand how living organisms detect stimuli and produce rapid, suitable responses to the environment ✅

Learning Objectives ✅

• Identify the functions of the nervous system.
• Describe the structure of the nerve cell and the role of each part.
• Explain polarization, depolarization, and repolarization.
• Understand how nerve impulses propagate along nerve fibers.
• Describe the structure and function of the synapse and neurotransmitters.

Lesson Parts 🎬

• Part 1: Nervous system
• Part 2: Nerve impulse
• Part 3: Synapse

Organized Content 📌

• 1) Nervous system
  • The nervous system receives information, processes it, and produces suitable responses.
  • Its function is essential for interaction with the surrounding environment.
• 2) Nerve cell
  • Cell body contains the nucleus and cytoplasm.
  • Dendrites receive nerve signals.
  • Axon carries signals away from the cell body.
• 3) Nerve impulse
  • A nerve impulse is an electrochemical phenomenon (ظاهرة كهروكيميائية).
  • Polarization is the resting state of the membrane.
  • Depolarization happens when sodium ions enter the cell.
  • Repolarization restores the original state of the membrane.
• 4) Synapse
  • A synapse is the junction between one neuron and the next.
  • It contains synaptic knobs, synaptic vesicles, and a synaptic cleft.
  • Signal transmission depends on neurotransmitters such as acetylcholine.
• 5) Technological application
  • The NCV test evaluates nerve function and helps detect nerve damage.

Common Mistakes ⚠️

• Confusing dendrites with axon.
• Thinking nerve impulse is purely electrical only.
• Confusing polarization with depolarization and repolarization.

By the end of the lesson… you can explain nerve impulse transmission and synapse function with confidence ✅