Module 2

1. Module 2

1.10. Page 8

Lesson 1

Module 2—The Endocrine System

Reflect and Connect

You now have the opportunity to reflect on the structures and organization of the endocrine system by answering ten multiple-choice questions. Before you continue, glance through pages 436 to 442 and answer the questions on page 442 of your textbook. You can get feedback from your teacher about your responses to these questions.

Module 2: Lesson 1 Assignment

Retrieve the copy of the Module 2: Lesson 1 Assignment that you saved to your computer earlier in this lesson. Complete the Reflect and Connect questions. Save your completed assignment in your course folder. You will receive instructions about when to submit your assignment to your teacher later in this lesson.

Reflect on the Big Picture

This photograph shows a young woman in a hospital bed. She is looking at a patient consent form with a man in a white doctor’s coat and a woman in a white uniform.

At the beginning of this module, you were introduced to Emily. She has all the same endocrine glands as you do and she secretes all the hormones that you do; however, due to growth of tiny tumours in her endocrine glands, she may secrete too much of one kind of hormone and not enough of another. Her body is under constant stress, and her negative feedback mechanisms do not restore homeostasis. Instead, positive feedback results, and she becomes ill due to the oversecretion of hormones putting constant stress on her body.

Going Beyond

Melatonin is a hormone produced by the tiny pineal gland in the brain. It is involved in your sleep-and-wake cycle. Melatonin is secreted during periods of darkness, causing you to sleep. Secretion is reduced during periods of light, causing you to be awake. Many people experience tiredness, inability to concentrate, and irritability when they are not exposed to sufficient periods of sunshine, such as during Canadian winters! Read “Light up Your Life!” on page 443 of your textbook and answer questions 1 and 2.

Module 2: Lesson 1 Assignment

Submit your completed Module 2: Lesson 1 Assignment to your teacher for assessment.