Biology

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Endocrine Ed Online Interactive

Worksheet

 

HORMONES AND FEEDBACK

1. Most hormones are secreted by an ________________________________ gland.

2. How do hormones travel around the body? ____________________________________.

3. ________________ ______________ have receptors for the hormones.

4. ________________________ is a state of being in balance.

5. Once homeostasis is achieved, the ____________________ causes the production of the hormone to turn off. This is part of the negative feedback mechanism.

 

Complete the diagram as it relates to the process of growth in humans:

Pituitary gland ____________________________ ______________________ (effect)

 

 

 

Without feedback, what would happen to a person’s height? _____________________________

 

Questions:

1. How does a feedback loop work?

 

 

2. What would happen if negative feedback did not occur?

 

 

ADRENALINE AND STRESS

 

1. List several effects of adrenaline:

 

2. Adrenaline gets the body ready for ___________________________________________.

 

Game: control Ed’s adrenaline

What is one thing that will raise his adrenaline level?

 

Quiz:

1. In which situation would adrenaline most likely be secreted by the adrenal glands?

 

2. When sufficient adrenaline has been secreted, production stops. This is part of the mechanism known as _________________________ feedback.

 

MELATONIN AND SLEEP

 

1. Melatonin production is high when it is ______________________________.

2. Melatonin is secreted by the ___________________________ gland.

3. Do melatonin levels remain constant from the time you fall asleep until the time you wake up? _______________________

 

BLOOD SUGAR HORMONES

 

1. Most cells are affected by insulin; what three cell types are highlighted in this simulation that have insulin receptors?

 

 

 

2. Insulin causes cells to ____________________ sugar and therefore ________________ blood sugar levels.

3. Glucagon causes the ___________________ to release sugar and causes blood sugar levels to ____________________.

 

Game: When you exercise, blood sugar levels ________________________ causing the release of ____________________________ to bring those levels back to normal ranges.

 

FUN QUIZ

 

Matching: hormones to their function

 

_____ 1. Raises blood sugar A. adrenaline

_____ 2. Helps you sleep B. glucagon

_____ 3. Increases muscle strength C. insulin

_____ 4. Lowers blood sugar D. melatonin

5. Calcitonin lowers blood calcium adding that calcium to the _____________________.

6. The parathyroid _____________________ blood calcium by taking the calcium from the __________________.

7. Once homeostasis is reached, hormone release will be _________________________.

8. If blood sugar levels are too high, _____________________ is released.

9. If blood sugar levels are too low, ______________________ is released.

10. Antidiuretics (ADH) help the body retain water by affecting the ________________________ (organ).

11. You would most likely produce ADH when you are ____________________________.

 
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