Hormones and homeostasis

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Homeostasis and hormones test

1. What happens to the body during homeostasis?

2. What does a negative feedback system involve and what is the result of this?

3. What does peripheral vasodilation involve?

4. What are effects of epinephrine?

5. What do exocrine glands include?

6. What hormone does the pancreas secrete?

7. A person eats a meal rich in carbohydrates. The body breaks down the carbohydrates into simpler molecules of glucose. Explain what happens to this person's body after he consumes this meal.

8. Write down five different endocrine glands.

9. A lack of which hormone, made by the pituitary gland, can cause a child to be very short but of normal intelligence?

10. A lack of which hormone causes dwarfism and mental retardation in children?

11. What is meant by hypoglycemia?

12. Why can't insulin be given in a pill?

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Answers to hormones and homeostasis

1. The body works to maintain a stable environment for all cells.

2. It involves organs/glands keeping internal body conditions as constant as possible.

3. Blood vessel dilation to cool an organism.

4. Increased mental alertness, increased blood flow to leg muscles, and an increased heart rate.

5. The sweat glands and salivary glands.

6. Insulin

7. The blood sugar levels in the body rise. Cells in the pancreas detect the change in blood, and more insulin is secreted by the pancreas. The cells responsible for this process are found in the islets of langerhans. The liver then absorbs more glucose. Body cells will use up more glucose. The blood sugar levels in the body will then fall.

8. Pituitary gland, pancreas, ovaries, thyroid gland, and testes.

9. Human growth hormone.

10. Thyroxine.

11. When there is not enough glucose in your bloodstream.

12. The acids in the stomach will destroy the insulin before it enters the blood.