IB Grade 12 Physical and Health Education (SEHS) | Chapter 3: Energy Systems by Prakhar Chauhan | Learn Smarter
K12 Students

Academics

AI-Powered learning for Grades 8–12, aligned with major Indian and international curricula.

Academics

Grades

Grade 8 Grade 9 Grade 10 Grade 11 Grade 12

Curriculum

CBSE ICSE IB
Professionals

Professional Courses

Industry-relevant training in Business, Technology, and Design to help professionals and graduates upskill for real-world careers.

Professional Courses
Games

Interactive Games

Fun, engaging games to boost memory, math fluency, typing speed, and English skills—perfect for learners of all ages.

games
Typing
Memory
Math
English Adventures
Knowledge
Chapter 3: Energy Systems

Energy systems are crucial for physical activity, enabling the body to produce ATP, the primary energy molecule necessary for muscle contraction. This chapter explores anaerobic and aerobic systems, detailing how they contribute to energy production under varying conditions. Understanding these systems enhances athletic performance and informs effective training strategies.

Enroll to start learning

You’ve not yet enrolled in this course. Please enroll for free to listen to audio lessons, classroom podcasts and take mock test.

Sections

  • 3

    Chapter 3: Energy Systems

    This chapter explores the three major energy systems of the human body: ATP production, anaerobic systems, and the aerobic system, detailing their roles in energy provision during various physical activities.

    Learning Practice

  • 3.1

    Atp Production: The Role Of Adenosine Triphosphate In Muscle Contraction

    ATP is the essential energy currency for muscle contractions, enabling movement through its breakdown and re-synthesis in the body.

    Learning Practice

  • 3.1.1

    What Is Atp?

    ATP, or adenosine triphosphate, is the primary energy currency in cells, essential for muscle contraction and energy transfer.

    Learning Practice

  • 3.1.2

    Atp In Muscle Contraction

    ATP is the essential energy currency for muscle contraction, facilitating various stages of the contraction cycle.

    Learning Practice

  • 3.2

    Anaerobic Systems

    Anaerobic systems provide energy without oxygen for high-intensity, short-duration activities.

    Learning Practice

  • 3.2.1

    The Atp-Pc (Phosphagen) System

    The ATP-PC system provides immediate energy for short, high-intensity activities by quickly regenerating ATP from phosphocreatine stored in muscles.

    Learning Practice

  • 3.2.1.1

    Overview

    This section discusses the essential role of ATP and the three primary energy systems in producing energy for physical activity.

    Learning Practice

  • 3.2.1.2

    How It Works

    This section discusses how the ATP-PC system rapidly generates ATP for quick, high-intensity activities.

    Learning Practice

  • 3.2.1.3

    Characteristics

    This section outlines the characteristics of the anaerobic ATP-PC and lactic acid systems that provide energy for high-intensity physical activities.

    Learning Practice

  • 3.2.2

    The Lactic Acid System (Anaerobic Glycolysis)

    The Lactic Acid System is an anaerobic energy system that produces ATP through the breakdown of glucose without oxygen, supplying energy for high-intensity activities lasting 10 seconds to 2 minutes.

    Learning Practice

  • 3.2.2.1

    Overview

    This section provides an insight into energy systems utilized by the human body during physical activity, focusing on ATP production and the roles of anaerobic and aerobic pathways.

    Learning Practice

  • 3.2.2.2

    How It Works

    This section explains the Lactic Acid System, its functioning, and significance in energy production during high-intensity activities.

    Learning Practice

  • 3.2.2.3

    Characteristics

    This section outlines the characteristics of anaerobic and aerobic energy systems, detailing their functions, fuel sources, and contributions to physical activity.

    Learning Practice

  • 3.3

    Aerobic System

    The aerobic system is an energy-producing mechanism that uses oxygen to support prolonged, moderate-intensity physical activities.

    Learning Practice

  • 3.3.1

    Fuel Sources

    This section outlines the primary fuel sources used by the aerobic energy system during physical activity.

    Learning Practice

  • 3.3.2

    Process Of Aerobic Metabolism

    The process of aerobic metabolism involves multiple stages to efficiently produce energy in the presence of oxygen.

    Learning Practice

  • 3.3.2.1

    Glycolysis

    Glycolysis is the metabolic pathway that converts glucose into pyruvate, generating energy in the form of ATP without the need for oxygen.

    Learning Practice

  • 3.3.2.2

    Krebs Cycle (Citric Acid Cycle)

    The Krebs Cycle is a critical component of aerobic metabolism where Acetyl-CoA is processed to generate energy carriers and minimal ATP.

    Learning Practice

  • 3.3.2.3

    Electron Transport Chain (Etc)

    The Electron Transport Chain is the final stage of aerobic metabolism where ATP is produced through the donation of electrons by NADH and FADH2, culminating in the formation of water.

    Learning Practice

  • 3.4

    Energy System Interplay

    The energy systems of the body work together dynamically, depending on activity intensity and duration.

    Learning Practice

  • 3.4.1

    Dynamic Contribution Of Energy Systems

    Energy systems interact dynamically to meet the varying demands of physical activity intensity and duration.

    Learning Practice

  • 3.4.2

    Factors Influencing System Dominance

    This section discusses the key factors that influence which energy system dominates during physical activity.

    Learning Practice

References

Untitled document (11).pdf

Class Notes

Memorization

What we have learnt

  • The human body uses ATP as ...
  • There are three main energy...
  • Energy systems work togethe...

Final Test

Revision Tests