What is the function of the endocrinesystem?
Pre-Lab Questions
1. What is the function of the endocrinesystem?
2. Research two types of hormones and describe the mode of action foreach.
3. Which gland is both endocrine andexocrine?
4. Whichhormonescontrolthefightorflightresponse?
5. What is type 1 diabetes and what is the treatment for thisdisease?
6. Describe how Ca2+ levels in the blood are regulated byhormones.
7. Howdothenervousandendocrinesystemsworktogethertomaintainhomeostasisofthebody?
Experiment 1: Microscopic Anatomy of the EndocrineSystem
Table 2: Experiment 1 Image Observations
Image Type Image Observations
Thyroid Gland
Parathyroid Gland
Pancreas
Adrenal Gland
Pituitary Gland
Anterior Pituitary Gland
Post-Lab Questions
Labeltheitemsinthefollowingslideimagesbasedonyourobservations.
A-
B-
C-
D-
2. Define what a hormoneis.
3. How do hormones establishselectivity?
4. Explain how insulin regulates glucose levels in theblood.
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)
30 Seconds in Ice Water (Step 10)
60 Seconds in Ice Water (Step 10)
90 Seconds in Ice Water (Step 10)
120 Seconds in Ice Water (Step 10)
Final – Dry (Step 12) Click here to enter text. Click here to enter text.
Table 4: Effect of Posture on Blood Pressure and Heart Rate
Time (Step #) Heart Rate (beats/minute) Blood Pressure (mmHg)
Initial – Sitting (Step 7)
Initial – Standing (Step 9)
1 Minute Standing (Step 10)
2 Minutes Standing (Step 10)
Final – 2 minutes Sitting
Post-Lab Questions
1. Writeyourhypothesisforthe“TestingTemperature”portionofthisexperiment.Besuretoinclude howyouthinkthedecreasedtemperaturewillaffectbloodpressureandheartrate,and,why.
2. Writeyourhypothesisforthe“TestingBodyPosition”portionofthisexperiment.Besuretoinclude how you think blood pressure and heart rate will vary when you sit versus when youstand.
3. Explainyourresultsintermsoftheendocrinesystem.Indicatehowtheendocrinesystemisinvolved in the physiological response to temperature and bodyposition.
4. Whichglandsaremostlikelytobeinvolvedwiththephysiologicalresponsecausedinthis experiment? Which hormones are most likely to beinvolved?
5. How does this experiment demonstrate the “fight or flight”response?
Experiment 3: Fetal Pig Dissection – Endocrine System
Post-Lab Questions
1. Describe the techniques utilized while dissecting the outer muscle layers of yourpig.
2. Whatsurprisedyouabouttheinternalanatomyofthepig?
3. What is unique about the glands of the endocrinesystem?
4. Explainthefunctionofthethyroidglandandthehormonesitsecretes.Includehowthereleaseof hormone is regulated and what cells the hormone acton.
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