1. Growth and Development
Chapter 8
Growth and Development
Lesson 1
Adolescence: A Time of Change
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2. The period between childhood and adulthood
adolescence
endocrine system
puberty
The period between childhood and adulthood
A body system containing glands that regulate growth and other activities
The time when you start developing the physical characteristics of adults of your gender
Click to reveal the definitions.

3. In this lesson, you will learn to
describe three kinds of changes you go through during the teen years.
identify the structure and function of the endocrine system.
analyze how a teen is influenced by peers.

4. Organizing Information
Divide a sheet of paper into three columns. Name each column for one of the sides of the health triangle. Write two changes that occur on each side.

5. Changes During Adolescence
Differences in how younger or older teens may look are caused by adolescence.
Mood swings are a normal part of adolescence.
adolescence The period between childhood and adulthood
Although teens experience these changes, they occur at different times and speeds for everyone.

6. Changes During Adolescence
Hormones are produced in the endocrine system.
endocrine system A body system containing glands that regulate growth and other important activities

7. Changes During Adolescence
These glands make up the endocrine system:
Pituitary
Thyroid
Adrenal
Pancreas
Ovaries / Testes
The pituitary gland produces several hormones that control other glands and organs. It also regulates the body’s growth and development.
The thyroid gland produces a hormone that regulates the speed at which your body turns food into energy. It also helps regulate growth.
The adrenal glands produce adrenaline, a hormone that controls the body’s response to emergencies. They also play a role in digestion and help maintain a balance of salt and water in the body.
The pancreas produces insulin, which controls the ability of body cells to use sugar for energy.
The ovaries and testes produce hormones that control sexual development.

8. Physical Changes
Physical changes that occur during puberty include the growth of body hair and increased sweating, or perspiration.
puberty The time when you start developing the physical characteristics of adults of your gender
Female Changes
Male Changes
Increased level of female hormones
Increased level of male hormones
Acne
Increase in perspiration
Underarm hair
Development of Breasts
Deeper voice
Increase in body fat
Facial hair
Wider hips
Broadened shoulders
Formation of mature eggs
Muscle development
Pubic hair
Beginning of menstrual cycles
Production of sperm cells
Enlargement of external genitals

9. Mental/Emotional Changes
Changes in hormones can affect your feelings as well as your thoughts.
You may experience mood swings.
You might be happy one moment and sad the next. These shifts in emotions are called mood swings and are common in adolescence. Talk about your feelings with others. This will help you manage your feelings in a healthy way.

10. Adolescence brings more responsibility.
Social Changes
Adolescence brings more responsibility.
As your friends become more important, choose friends that will support you and influence you in a positive way.
Your parents may give you more responsibility such as asking you to help care for a younger sibling or to prepare meals.

11. What I Learned Vocabulary Define endocrine system. Lesson 1 Review
It is a body system containing glands that regulate growth and other activities.

12. Lesson 1 Review
What I Learned
Recall Name two physical changes that occur during puberty.
Answer should include any of the changes listed in Figure 8.2.

13. Lesson 1 Review
What I Learned
Identify What are some social changes that occur during adolescence?
Sample answers: becoming more independent, having more responsibility, spending more time with friends, and experiencing the influence of peers

14. Lesson 1 Review
Thinking Critically
Apply Peter gets teased by some of his peers because he is going through puberty. If you went to school with Peter, how would you teach these peers to respect Peter?
Sample answer: These changes are normal for teens entering puberty.

15. Lesson 1 Review
Thinking Critically
Evaluate How do you think the changes you experience during puberty help you prepare for adulthood?
Answers, which will vary, should show an understanding of the changes that occur during puberty.

16. Growth and Development
End of
Chapter 8
Growth and Development
Lesson 1
Adolescence: A Time of Change
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