NCERT Class 9 Physical Education Important Chapter 7 Growth, development, and Maturation Solutions English Medium As Per New Syllabus. to each chapter is provided in the list so that you can easily browse through different chapters NCERT Class 9 Physical Education Important Chapter 7 Growth, development, and Maturation Notes and select need one. NCERT Class 9 Physical Education Additional Question Answers Download PDF. NCERT Class 9 Physical Education And Well – Being Important Solutions.
NCERT Class 9 Physical Education Important Chapter 7 Growth, development, and Maturation
Also, you can read the NCERT book online in these sections Solutions by Expert Teachers as per Central Board of Secondary Education (CBSE) Book guidelines. CBSE Class 9 Physical Education Additional Solutions are part of All Subject Solutions. Here we have given NCERT Class 9 Physical Education Important Notes, CBSE Class 9 Physical Education Additional Notes for All Chapters, You can practice these here.
Growth, development, and Maturation
Chapter: 7
| Unit – 2 Science and Sports |
| IMPORTANT QUESTION AND ANSWER |
Short Question Answer:
1. What is growth?
Ans: Growth is the measurable, quantitative change in the size and composition of the body, such as an increase in height, weight, and organ size.
2. What is development?
Ans: Development refers to the overall qualitative changes in shape, structure, functioning, motor skills, and behaviour that continue throughout life.
3. What is maturation?
Ans: Maturation is the qualitative and biological progression of the body towards adulthood and full functional capacity, such as skeletal maturity and the onset of puberty.
4. How does heredity affect growth and maturation?
Ans: Heredity determines the baseline for height, body size, and skeletal proportions, and it regulates the timing of system-specific maturation and puberty.
5. What role does nutrition play in development?
Ans: A balanced diet provides adequate nutrients that support brain function, learning, and the development of motor skills.
6. What are growth plates in bones?
Ans: Growth plates, or physes, are areas of flexible cartilage near the ends of children’s and teenagers’ long bones where new bone is added to allow bones to grow.
7. What method is used to determine skeletal age in sports?
Ans: The Tanner–Whitehouse 3 (TW3) method is a sports age determination technique that uses an X-ray of the left hand and wrist to assess skeletal maturity.
8. How does the environment influence growth and maturation?
Ans: Safe surroundings encourage exploration and learning, while poor conditions, pollution, or toxins can restrict body growth and disrupt maturation processes.
9. Who are considered ‘children’ and ‘youth’ in terms of age categories?
Ans: Children are generally students under 12 years of age, while youth is often used as a global term for anyone under 19 years.
10. How does physical activity affect the human body during growth?
Ans: Physical activity stimulates bone density, muscle hypertrophy, and cardiovascular growth, while also improving motor coordination and skill acquisition.
Long Question-Answers:
1. What are the main differences between growth and development?
Ans: Growth refers to structural and physical changes that are measurable and quantitative, such as an increase in height or weight, and it typically stops after maturity is attained. Development is a wider term involving qualitative changes in functioning, skills, and behaviour, which continues throughout a person’s life and is possible even without physical growth.
2. How do hormones and psychological factors influence growth and development?
Ans: Hormones like growth and thyroid hormones regulate cell multiplication and bone growth, while sex hormones trigger reproductive maturity and aid proper organ function. Psychologically, high levels of stress can reduce growth hormone secretion, whereas a healthy emotional state supports positive biological processes and growth.
3. Explain the concept of ‘maturation’ and its relationship with growth and development.
Ans: Maturation is the biological process of the body progressing towards adulthood and full functional capacity, indicated by markers like puberty and closure of growth plates. It sets the pace for growth and development by determining when specific body systems are biologically ready to function and adapt.
4. What are bone growth plates, and why are they important to consider during physical activity?
Ans: Bone growth plates (physes) are areas of flexible cartilage near the ends of long bones in youth where new bone is formed. Because they are weaker than surrounding ligaments and tendons, they are susceptible to fractures; therefore, vertical load-bearing exercises should be restricted in pre-adolescents to avoid compromising the epiphyseal growth plate and future bone growth.
5. Describe how age is categorised in the context of growth, development, and sports.
Ans: Age categories help understand developmental stages, though they are often used interchangeably. ‘Children’ refers to students under 12 years of age. ‘Adolescence’ begins with the onset of puberty, which has no fixed age. ‘Youth’ is a broad term for anyone under 19 years old, and ‘young athletes’ refers to youth specifically participating in sports.
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