Nervous and Endocrine Systems

Grade 12 · Biology

Semester 2 | Period 5 | Week 26

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Subject: Biology

Semester: 2

Period: 5

Week: 26

School Name:
Teacher’s Name:
Subject: Biology
Grade Level: Grade 12
Week & Period: Week 26, Period V
Date:
Topic: Nervous and Endocrine Systems
Sub-topic: Structure and Function of the Brain and Spinal Cord; Types of Neurons

 

Learning Objectives

By the end of the lesson, learners should be able to:

  1. Describe the structure and function of the spinal cord and the brain.
  2. List and explain the parts of the brain and their functions.
  3. Identify and classify the types of neurons.
  4. Explain the role of the spinal cord in coordination and reflex actions.

 

Previous Knowledge

Learners already know the general divisions of the nervous system and have identified sensory and motor neurons.

 

Instructional Materials

  • Diagram/model of human brain and spinal cord
  • Chart showing types of neurons
  • Flashcards for brain parts and their functions
  • Short animation or video clip on the brain and reflex action (if available)

 

Anticipation (Warm-Up) – 5 minutes

Ask learners:

  • “What part of your body is in charge of thinking, walking, breathing, and reflexes?”
    Use answers to introduce the lesson: The brain and spinal cord control our body functions.

 

Building Knowledge (Main Lesson) – 25 minutes

  1. The Spinal Cord
  • Long cord inside the backbone
  • Carries signals to and from the brain
  • Controls reflex actions
  • Protected by vertebrae
  1. Parts of the Brain and Their Functions
  • Cerebrum: thinking, memory, senses
  • Cerebellum: coordination and balance
  • Medulla oblongata: controls involuntary actions like breathing and heartbeat
  1. Types of Neurons (Review and Deepen)
  • Sensory Neuron: brings information from sense organs
  • Motor Neuron: sends instructions to muscles/glands
  • Relay Neuron: links sensory and motor neurons in the CNS

 

Learners’ Activities

  • Label a diagram of the brain and spinal cord in groups.
  • Match brain parts to their functions using flashcards.
  • Act out a reflex action (teacher taps knee with a book lightly; learner describes response).

 

Consolidation (Review and Assessment) – 10 minutes

Oral Questions:

  1. What are the three main parts of the brain and what does each part do?
  2. What is the spinal cord’s job?
  3. Which neuron connects the brain to muscles?

Homework/Assignment:

  • Draw and label the brain, cerebrum, cerebellum, and medulla.
  • In 5 sentences, describe how a reflex action works.

 

Short Notes (For Learners)

The spinal cord is a thick bundle of nerves in the backbone that connects the brain to the rest of the body. It helps with sending messages and doing reflex actions like pulling your hand away from something hot.

The brain has 3 major parts:

  • Cerebrum helps you think, speak, and remember.
  • Cerebellum helps you balance and move.
  • Medulla controls things like breathing and heart rate.

There are 3 main types of neurons:

  • Sensory (feel and send info to the brain)
  • Motor (send commands from brain to muscles)
  • Relay (link both inside the spinal cord)

 

Expanded Notes/Instructions

  • Learners should complete a reflection journal on how the brain and spinal cord help them daily.
  • Assign an in-class activity where each group presents a part of the brain using a creative approach (e.g., a skit or song).
  • Support slower learners with diagram tracing worksheets.

 

Inclusive/Differentiation

  • Visual aids for diagram-oriented learners
  • Peer teaching for learners with difficulty understanding text
  • Roleplay activities for kinesthetic learners