Module 10 Lab Worksheet: Endocrine System lab report and essay assignment papers and questions

Module 10 Lab Worksheet: Endocrine System lab report and essay assignment papers and questions

Module 10 Lab Worksheet: Endocrine System lab report and essay assignment papers and questions

Module 10 Lab Worksheet: Endocrine System lab report and essay assignment papers and questions
Module 10 Lab Worksheet: Endocrine System
Introduction
This week’s lab will focus on the major endocrine glands and the hormones they secrete.
Objectives
Objectives for this week’s lab include:  1) Identify the location of the major endocrine glands, 2) Map out the hormonal secretion of and influence of the major endocrine glands, and 3) Identify the role of major endocrine hormones, and 4) Describe the negative feedback mechanism to maintain homeostasis.
Overview
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The endocrine system regulates the body’s actions and metabolic activity through the use of chemical messengers called hormones.  Hormones, produced by endocrine glands, are secreted directly into the blood stream, travel throughout the body and influence the actions and activity of various cells.  It’s a complex mechanism of how a hormone directly influences a cell but a cell needs to have a specific receptor on its plasma membrane to bind a specific hormone.  If a cell has a specific hormone, it is referred to as a target cell. Module 10 Lab Worksheet: Endocrine System lab report and essay assignment papers and questions.
Each hormone will have a unique and specific influence on cellular activity that may include:  reproduction activities, growth and development, electrolyte, water and nutrient balance in the blood, metabolism and even influence our immune system.  Once a cell binds a hormone through its receptor, the response and impact of that hormone can vary greatly.  Some hormones have an almost instantaneous effect on that cell (such as epinephrine, aka- adrenaline) to an effect that can last days to even months (such as growth hormone).
Hormonal levels are maintained by a negative feedback mechanism.  As hormonal levels rise in the blood and affect the target cells, it causes a negative feedback loop to initiate the inhibition of further hormone production and secretion from its endocrine gland.  Through this mechanism, hormonal homeostasis is maintained within a very narrow range and is vital because any imbalances to hormonal levels can cause drastic changes in the body’s physiology and can cause conditions such as, type 2 diabetes and hypothyroidism. Module 10 Lab Worksheet: Endocrine System lab report and essay assignment papers and questions
Materials

Endocrine gland models

Pre-Lab Evaluation Questions
The pre-lab evaluation questions must be answered prior to lab and demonstrated to your lab instructor.  You must read through the assigned chapter readings, lab introduction, objectives, overview and procedure to answer these questions.
Please cite your work for any reference source you utilize in answering these questions.

In your own words, briefly describe how the endocrine system helps to maintain homeostasis within the body.

 

Explain how the thyroid gland and the parathyroid gland help to maintain homeostasis of blood calcium levels?

 

The thyroid gland also produces two hormones that influence our body’s metabolism. What are those two hormones and the difference between them?  What element/molecule is vital to provide proper function to these two hormones? In general and overall, what effect do these two hormones have on the body’s function?

 

The adrenal cortex synthesizes over two dozen steroid base hormones collectively called corticosteroids. Corticosteroids are also a class of medications.  Medically, what are corticosteroids, what are some examples of corticosteroid medications, what conditions do they treat and what are the complications of using them?

 

What is the importance of maintaining proper blood sugar levels? Why do the cells need glucose and what hormone helps transport glucose into the cells?  What are normal blood sugar levels within humans?  How does the pancreas and liver maintain blood sugar homeostasis? Module 10 Lab Worksheet: Endocrine System lab report and essay assignment papers and questions

Part 01 Procedure:  Endocrine Gland Location
1.   Identify the location of the major endocrine glands in the diagram below:

Answers:
 
A)
B)
C)
D)
E)
F)
G)
H)
I)
J)
 
Part 02 Procedure:  Endocrine Hormonal Secretion

Utilize “Appendix A” to map out the hormonal secretion and interaction of the major endocrine glands hormones. Utilize the word bank in “Appendix C” for to complete the chart.  Demonstrated are the hormones “Growth Hormone Releasing Hormone” and “Growth Hormone”.
Hint: The thyroid gland demonstrates two hormones that are secreted; one hormone is regulated by the pituitary gland, which is demonstrated by the line coming from the pituitary.  Please record your answers below:
A)

B)
C)
D)
E)
F)
G)

H)

I)
J)
K)
L)

M)

N)
O)
P)
Q)
R)
S)

T)

U)

V)

W)
X)
Part 03 Procedure:  Feedback Regulation of Hormones

Please match the appropriate hormone with the description provided in “Appendix B” utilizing the word bank provided in “Appendix C”. Please record your answers below.

 
A)
B)
C)
D)
E)
F)
G)
H)
I)
J)
Part 04 Procedure:  Feedback Regulation of Hormones

Utilizing the interaction of the thyroid releasing hormone (TRH), thyroid stimulating hormone (TSH), thyroxine (T4) and triiodothyronine (T3) hormones please demonstrate the role of the negative feedback loop to maintain proper thyroid hormone blood levels. Also, be able to explain how a goiter would develop too.

 

The pancreas plays a very dynamic and vital role in our body’s ability to maintain blood sugar homeostasis. Within your lab groups, discuss and describe the following situations using appropriate medical terminology, anatomy and hormones:

 

Your blood sugar levels are low, through what mechanism does your body increase blood sugar levels?
Your blood sugar levels are too high, through what mechanism does your body decrease blood sugar levels? Module 10 Lab Worksheet: Endocrine System lab report and essay assignment papers and questions
Why is it so vital for sugar to be transported from the blood vessels to the cells of the body? (Think back to cellular respiration.)

 

How does the imbalance of regulating blood sugar levels over time lead to the development of type 2 diabetes?

Post-Lab Evaluation Questions
The post lab evaluation questions must be completed prior to your submission of the lab.  Answers for these questions will be derived from the lab protocol, the weekly concepts associated with the lab and possibly research content from the book and/or online resources.
 
Please cite your work for any reference source you utilize in answering these questions.
 

Please answer the following questions regarding a mini-case study on Diabetes: Joe, a 58-year-old overweight male who is a widower, went through a routine physical which demonstrated a Hemoglobin A1c blood test of 8.5%.  His previous A1c test 6 months ago was 6.5%.  What is the significance of this test and value?  What is the most likely diagnosis (be specific)?
The doctor asked Joe about his diet and lifestyle; if Joe were honest, how would he have responded most likely? When the doctor asked Joe if he knew what Diabetes was, he responded, “I’ve heard of it, it’s that thing where I have to take some medication to fix it, right?”.  In a paragraph, how would you best explain what Diabetes is? Remember, you’re talking to a patient.

Module 10 Lab Worksheet: Endocrine System lab report and essay assignment papers and questions

After your explanation, Joe responded, “Oh, I remember now. Will I have to take those shots, before I eat all the time now?”  How do you respond to Joe’s question about treating this condition? Please include the lifestyle changes and the possibility of oral medication and the use of insulin.

Joe seems to be starting to understand his condition and asks a great question, “If I don’t do these sort of treatments, what can happen to me?”
Basically, Joe is asking about the various complications that can result from uncontrolled blood sugar levels.  What do you tell him?  Include short and long-term uncontrolled blood sugar level complications.
Joe sits quietly for a moment and then states, “I have a son in his late 20’s who’s a bit overweight too, what can I tell him so he can stop this from happening to him? What can I do to fix this problem too?”.  How do you respond to these questions? Module 10 Lab Worksheet: Endocrine System lab report and essay assignment papers and questions

Appendix A

 
Appendix B
 
Descriptions of hormones
 

Which hormone will assist the body in lowering blood sugar levels?
Which gland synthesizes a hormone that helps regulate the sleep cycle?
Which hormone leads to water conservation (reabsorption) in the kidneys and is produced by the hypothalamus? Module 10 Lab Worksheet: Endocrine System lab report and essay assignment papers and questions
Which hormone lowers blood calcium levels by decreasing absorption of calcium and stimulates osteoblast activity in bone tissue?
Which hormone(s) has/have potent anti-inflammatory effects, decreases the immune system function and is largely secreted during times of stress?
Which hormone secreted by the adrenal cortex helps regulates blood pressure by increasing reabsorption of various ions and water in the kidneys leading to increased water retention and ultimately increased blood pressure? Module 10 Lab Worksheet: Endocrine System lab report and essay assignment papers and questions
Which hormone acts upon the liver to assist in raising blood sugar levels?
Which hormone stimulates ovulation (release of an egg from the ovary) during the middle of the menstrual cycle?
Which hormone stimulates the production of breast milk post-birth?
Which hormone will stimulate the testes to produce sperm? Module 10 Lab Worksheet: Endocrine System lab report and essay assignment papers and questions

 
Appendix C
Word bank for Part 02 and Part 03 Procedures

Adrenocorticotrophic hormone (ACTH)
Aldosterone
Antidiuretic hormone (ADH)
Calcitonin
Corticotropin-releasing hormone (CRH)
Cortisol
Epinephrine (adrenaline)
Estrogen
Follicle stimulating hormone (FSH)
Glucagon
Glucocorticoids
Gonadocorticoids (androgens)
Gonadotropin-releasing hormone (GnRH)
Growth Hormone
Growth hormone-releasing hormone (GHRH)
Insulin
Luteinizing hormone (LH)
Melatonin
Mineralcorticoids
Norepinephrine (noradrenaline)
Oxytocin
Parathyroid hormone
Prolactin
Progesterone
Testosterone
Thyroid hormone (T3 and T4)
Thyroid stimulating hormone (TSH)
Thyrotropin-releasing hormone (TRH)

Module 10 Lab Worksheet: Endocrine System lab report and essay assignment papers and questions

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