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Lab 9 The Endocrine System
BIO201L
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Kit Code (located on the lid of your lab kit): Click here to enter text.
Pre-Lab Questions
”1. What is the function of the endocrine system?”
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”2. Research two types of hormones and describe the mode of action for each. ”
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”3. Which gland is both endocrine and exocrine? ”
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”4. Which hormones control the fight or flight response? ”
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”5. What is type 1 diabetes and what is the treatment for this disease? ”
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”6. Describe how Ca2+ levels in the blood are regulated by hormones. ”
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”7. How do the nervous and endocrine systems work together to maintain homeostasis of the body? ”
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Experiment 1: Microscopic Anatomy of the Endocrine System
Table 2: Experiment 1 Image Observations
Image Type
Image Observations
Thyroid Gland
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Parathyroid Gland
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Pancreas
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Adrenal Gland
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Pituitary Gland
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Lab 9 The Endocrine System
Anterior Pituitary Gland
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Post-Lab Questions
”1. Label the items in the following slide images based on your observations. ”
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BIO201L
Lab 9 The Endocrine System
BIO201L
Lab 9 The Endocrine System
BIO201L
”2. Define what a hormone is. ”
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”3. How do hormones establish selectivity? ”
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”4. Explain how insulin regulates glucose levels in the blood. ”
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Experiment 2: Stress Response
Table 3: Effect of Temperature on Blood Pressure and Heart Rate
Time (Step #)
Heart Rate (beats/minute)
Blood Pressure (mmHg)
Initial – Normal Temperature (Step 7)
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30 Seconds in Ice Water (Step 10)
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60 Seconds in Ice Water (Step 10)
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90 Seconds in Ice Water (Step 10)
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120 Seconds in Ice Water (Step 10)
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Final – Dry (Step 12)
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Table 4: Effect of Posture on Blood Pressure and Heart Rate
Time (Step #)
Heart Rate (beats/minute)
Blood Pressure (mmHg)
Initial – Sitting (Step 7)
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Initial – Standing (Step 9)
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1 Minute Standing (Step 10)
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2 Minutes Standing (Step 10)
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Lab 9 The Endocrine System
Final – 2 minutes Sitting
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BIO201L
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Post-Lab Questions
”1. Write your hypothesis for the “Testing Temperature” portion of this experiment. Be sure to include
how you think the decreased temperature will affect blood pressure and heart rate, and, why. ”
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”2. Write your hypothesis for the “Testing Body Position” portion of this experiment. Be sure to include
how you think blood pressure and heart rate will vary when you sit versus when you stand. ”
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”3. Explain your results in terms of the endocrine system. Indicate how the endocrine system is involved
in the physiological response to temperature and body position. ”
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”4. Which glands are most likely to be involved with the physiological response caused in this
experiment? Which hormones are most likely to be involved? ”
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”5. How does this experiment demonstrate the “fight or flight” response? ”
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Experiment 3: Fetal Pig Dissection – Endocrine System
Post-Lab Questions
”1. Describe the techniques utilized while dissecting the outer muscle layers of your pig. ”
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”2. What surprised you about the internal anatomy of the pig? ”
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”3. What is unique about the glands of the endocrine system? ”
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”4. Explain the function of the thyroid gland and the hormones it secretes. Include how the release of
hormone is regulated and what cells the hormone act on. ”
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Lab 9 The Endocrine System
BIO201L
”Insert photo of your pig’s exposed pancreas with your name clearly visible in the background: ”
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