Theme C: Interaction and Interdependence - IB 12 Sciences Biology
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Theme C: Interaction and Interdependence

Theme C: Interaction and Interdependence

The chapter explores the essential biological concepts of interaction and interdependence across various themes, including molecular biology with enzymes and metabolism, cellular respiration, photosynthesis, cellular communication, neural signaling, body systems integration, defense mechanisms against diseases, and ecosystem dynamics. Emphasis is placed on the interconnectivity of biological processes and the importance of energy flow and matter cycling in sustaining life.

13 sections

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Sections

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  1. 1

    This section explores the vital roles of molecules such as enzymes in...

  2. 1.1
    Enzymes And Metabolism

    Enzymes are catalysts that facilitate metabolic reactions in organisms.

  3. 1.2
    Cell Respiration

    Cell respiration is the process by which cells convert glucose into ATP for energy.

  4. 1.3
    Photosynthesis

    Photosynthesis transforms light energy into chemical energy in plants,...

  5. 2

    This section covers the fundamental concepts of enzymes, cellular...

  6. 2.1
    Chemical Signaling (Hl Only)

    Chemical signaling is the process through which cells communicate and...

  7. 2.2
    Neural Signaling

    Neural signaling involves the transmission of information through neurons,...

  8. 3

    This section covers the integration of body systems and the immune response...

  9. 3.1
    Integration Of Body Systems

    The human body comprises various systems that collaborate to maintain...

  10. 3.2
    Defense Against Disease

    The immune system protects the body from pathogens through innate and...

  11. 4

    Ecosystems encompass interactions between populations, communities, and...

  12. 4.1
    Populations And Communities

    This section explores the concepts of populations and communities within an...

  13. 4.2
    Transfers Of Energy And Matter

    This section explores how energy and matter flow and cycle through...

What we have learnt

  • Enzymes are critical for metabolic processes, acting as biological catalysts that lower activation energy.
  • Cellular respiration consists of several stages for converting glucose into ATP, with anaerobic conditions leading to lower energy yields.
  • Photosynthesis involves light-dependent and light-independent reactions to convert solar energy into chemical energy.
  • Chemical and neural signaling are crucial for cellular communication and response coordination.
  • The human body maintains homeostasis through interconnected systems that work collaboratively.

Key Concepts

-- Enzyme
A biological catalyst that accelerates chemical reactions without being consumed.
-- Cellular Respiration
The process of converting glucose to ATP, comprising glycolysis, Krebs cycle, and electron transport chain.
-- Photosynthesis
The process by which light energy is converted into chemical energy in plants, involving light-dependent and independent reactions.
-- Signal Transduction
The process by which a signaling molecule binds to a receptor and triggers a series of intracellular events.
-- Community Dynamics
The interactions between different populations within an ecosystem, including population dynamics and community interactions.

Additional Learning Materials

Supplementary resources to enhance your learning experience.