Week 7 Lab Document
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Week 7 Endocrine System Lab Learning Objectives:
Understand hormonal feedback mechanisms.
Introduction:
The body uses a variety of mechanisms to keep hormone levels tightly regulated. A critical mechanism is using feedback loops in which a hormone, such as estrogen, feeds back to control its own production. This can be either a positive or a negative feedback loop.
In a negative feedback loop, a stimulus, such as a hormone or a neurotransmitter, causes the
release of a product, such as estrogen. When the product reaches a certain level in the bloodstream, it signals to the hypothalamus and anterior pituitary to stops further release of the stimulating hormone or neurotransmitter and thereby leads to reduced levels of the product. A positive feedback loop is the opposite loop. A product signals to produce more of the stimulating hormone or neurotransmitter which causes a continuous increase of the product.
Can we control hormones? In this simulation you will learn different hormones’ influence on fertility. We will perform animal friendly virtual experiments on some beautiful bunnies to try to
keep the petting zoo population from getting out of control!
Assignment: Part 1
Complete the Labster " Endocrinology: Learn how contraceptives work”
Have the lab report with you as you go through the lab to record data. The theory section is a helpful resource.
Part 2
Complete the lab report.
Endocrine System Lab Report
1.
What hormones were used in the fertility experiments? (2 points)
The hormones used in the experiment were testosterone, progesterone, and GnRH.
2.
Data: (2 points; ½ point each)
Endometrial thickness (0-6) Control
6
GnRH
4
Progesterone
0
Testosterone
0
3.
What is the importance of a having a control in an experiment? (2 points)
A control ensures that what is claimed to be tested is what is being tested. It minimizes the effects of other factors besides what is being tested.
4.
What effect does an increase in GnRH release from the hypothalamus have on the pituitary? (2 points)
GnRH stimulates the pituitary gland to produce Follicle Stimulating Hormone (FSH), which causes oocyte (egg) development and an increase in estrogen levels.
5.
a. Which of the hormones tested would likely decrease fertility in females? (2 points)
Follicle Stimulating Hormone (FSH) would decrease fertility in females as it is the hormone that causes the development of the oocyte (egg).
b. Which of the hormones tested would likely decrease fertility in males? (1 point)
Follicle Stimulating Hormone (FSH) would decrease fertility in males as it is the hormone that causes sperm development in males.
6.
Why might testosterone not be an ideal contraceptive choice for females? (2 points)
Testosterone is not an ideal contraceptive choice in females because too much testosterone may cause a woman to have stronger male features such as a deep voice, excessive body hair, balding, increased muscle mass, decreased breast size and an enlarged clitoris. It can also cause infertility and obesity.
7.
Discuss an example of a negative hormonal feedback mechanism other than those involving the reproductive system. (2 points)
Regulation of Blood Glucose Levels:
1)
Increase in blood glucose level.
2)
Pancreas release insulin into the blood.
3)
Some glucose is stored in the liver as glycogen, while the rest is taken up by the cells and used for energy.
4)
Blood glucose levels decrease.
5)
Body is back in homeostasis.
Grading Rubric for Lab Report
Activity
Deliverable
Points
Part 1
Complete Labster
15
Part 2
Complete lab report 15
Total
Complete all lab activities
30
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Related Questions
HELP ASAP
Explain using an example how hormones can have an inhibitory response and why this would happen in the human body (3-4 sentences)
arrow_forward
What does the feedback loop for Vincent look like?
be sure to indicate all the hormones and glands involved in the feedback loop.
indicate whether the hormone levels are increasing or decreasing.
use arrows to indicate the direction of influence and label whether it is a negative or positive feedback.
arrow_forward
Topic: Endocrine Physiology
1. Give 3 examples of lipid-soluble hormones and water-soluble hormones
2. What three types of signals control hormone secretion
arrow_forward
asap please
arrow_forward
Activity
Direction: Answer the following question.
1. What is the Endocrine system?
2. Define Hyperthyroidism and explain why
one of its symptoms is weight loss.
3. What is the primary role of the
parathyroid gland?
4. How do hormones differ from the nervous
system?
5. How many hormones are secreted by the
anterior lobe of the pituitary gland?
arrow_forward
Topic: Endocrine Physiology
1. What three types of signals control hormone secretion
arrow_forward
Please specify how hyperthyroidism and hypothyroidism occur.
Why is the iodine important for homeostasis?
What is the appropriate drugs to treat hyperthyroidism and hypothyroidism among the below drugs:
Peroxidine: A drug that inhibits thyroid peroxidase from functioning
Cimigine: A drug that inhibits potassium/iodine cotransporter
Iodimine: A drug that inhibits iodinase from functioning
Aldosine: A drug that inhibits production of angiotensinogen from the liver
Aldoramine: A drug that inhibits sodium/iodine cotransporter
Thyromine: A drug that stimulates thyroglobulin production
Thank you,
arrow_forward
Functions of Various Hormones
1. Increases water reabsorption in the kidney tubules
2. Promotes the reabsorption of sodium by the kidneys to increase water reabsorption
3. Regulates secretion of hormones by anterior pituitary gland
4. Stimulates mitosis and promotes bone and muscle growth
5. Raises blood glucose level in response to long-term stress
6. Triggers fight-or-flight response for short-term stress
Match four of the functions numbered above with the
rmones given below.
Function:
Antidiuretic
Hormone:
Cortisol
Aldosterone
Epinephrine
hormone
arrow_forward
Describe how the nervous system and the endocrine system work together in the
fight-flight response. Be specific with what parts of the nervous system are at play,
the signal pathway, what is released/secreted and what response they create.
arrow_forward
Name the pituitary hormone responsible for the following action:
• stimulates cells to increase in size and divide more rapidly.
arrow_forward
Q1/ Describe the hypothalamic-pituitary-gonadal axis of hormone secretions and indicate the
negative feedback look on this pathway.
arrow_forward
Note: Explain and summarize the terms and ideas.
arrow_forward
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Quizzes 2
Which endocrine organ has these three roles?
Acts as an endocrine organ releasing ADH and OXT at the posterior lobe of the
pituitary gland
Secretes regulatory hormones which control activity of the anterior lobe of the
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arrow_forward
Name the pituitary hormone responsible for the following action:
• stimulates secretion from thyroid gland.
arrow_forward
Can please check and see if sort the hormones correctly and asnwr the questions. Thank you
Know which hormone is released by the hypothalamus and which is released by the anterior pituitary. Know whether the hypothalamic hormone is a releasing or inhibiting hormone. What are the targets in the body of the anterior pituitary hormones and what do those targets secrete? What is the final target and response? Make sure you know both the abbreviations and the full names of the hormones.
Dopamine, prolactin: produced by the hypothalamus
Somatostatin, GHRH, GH, insulin-like growth factors: GHRH produced by the hypothalamus GH and insulin-like growth factor: anterior pituitary
TRH, TSH, thyroid hormone:TRH produced by the hypothalamus TSH and thyroid homes: prouded by the anterior pituitary
CRH, ACTH, and cortisol CRH: hyptahlmus ACTH and cortisol: anterior pituary
GnRH, FSH, LH, estrogen, progesterone, testosterone
GnRH produced by the hypothalamus
FSH, LH, estrogen, progesterone,…
arrow_forward
Please match the following hormones with their functions.
Increases thyroid hormone
secretion
1. ADH
Regulates cell metabolism
2. Glucagon
Increases milk production in
females
3. Oxytocin
Prolongs sympathetic
response
4. Epinephrine
Increases uterine
5. Thyroxine
contraction
6. Prolactin
Increases blood sugar
7. ACTH
Decreases urination
8. TSH
Stimulates tissue growth
9. GH
Increases steroid release
arrow_forward
Identify the hormones released from the anterior pituitary lobe• Describe how their secretion is controlled and their general physiological effects.
arrow_forward
Identify and answer plz.
arrow_forward
#Q03
arrow_forward
Could you please assist with the matching?
arrow_forward
Topic: Oxytocin
arrow_forward
-_3_You have Define hyperthyroidism and explain why one of its symptoms is weight loss.
ANSWERS SHOULD INCLUDE:
Meaning of the term "hyperthyroidism ", and state the common causes .
Explain effects of T3 and T4 (i.e. basal metabolic rate, consumption of calories and heat production)??
arrow_forward
a) How does the body's hormonal response to short-term stress differ from the
body's hormonal response to long-term stress? In your answer, provide the names of
the hormones released, the glands from which they are released, and the effects on
the body.
b) Provide 2 reasons (as discussed in class) why long-term stress is harmful to our
physical health.
arrow_forward
Hormones release question.
arrow_forward
SEE MORE QUESTIONS
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Related Questions
- HELP ASAP Explain using an example how hormones can have an inhibitory response and why this would happen in the human body (3-4 sentences)arrow_forwardWhat does the feedback loop for Vincent look like? be sure to indicate all the hormones and glands involved in the feedback loop. indicate whether the hormone levels are increasing or decreasing. use arrows to indicate the direction of influence and label whether it is a negative or positive feedback.arrow_forwardTopic: Endocrine Physiology 1. Give 3 examples of lipid-soluble hormones and water-soluble hormones 2. What three types of signals control hormone secretionarrow_forward
- asap pleasearrow_forwardActivity Direction: Answer the following question. 1. What is the Endocrine system? 2. Define Hyperthyroidism and explain why one of its symptoms is weight loss. 3. What is the primary role of the parathyroid gland? 4. How do hormones differ from the nervous system? 5. How many hormones are secreted by the anterior lobe of the pituitary gland?arrow_forwardTopic: Endocrine Physiology 1. What three types of signals control hormone secretionarrow_forward
- Please specify how hyperthyroidism and hypothyroidism occur. Why is the iodine important for homeostasis? What is the appropriate drugs to treat hyperthyroidism and hypothyroidism among the below drugs: Peroxidine: A drug that inhibits thyroid peroxidase from functioning Cimigine: A drug that inhibits potassium/iodine cotransporter Iodimine: A drug that inhibits iodinase from functioning Aldosine: A drug that inhibits production of angiotensinogen from the liver Aldoramine: A drug that inhibits sodium/iodine cotransporter Thyromine: A drug that stimulates thyroglobulin production Thank you,arrow_forwardFunctions of Various Hormones 1. Increases water reabsorption in the kidney tubules 2. Promotes the reabsorption of sodium by the kidneys to increase water reabsorption 3. Regulates secretion of hormones by anterior pituitary gland 4. Stimulates mitosis and promotes bone and muscle growth 5. Raises blood glucose level in response to long-term stress 6. Triggers fight-or-flight response for short-term stress Match four of the functions numbered above with the rmones given below. Function: Antidiuretic Hormone: Cortisol Aldosterone Epinephrine hormonearrow_forwardDescribe how the nervous system and the endocrine system work together in the fight-flight response. Be specific with what parts of the nervous system are at play, the signal pathway, what is released/secreted and what response they create.arrow_forward
- Name the pituitary hormone responsible for the following action: • stimulates cells to increase in size and divide more rapidly.arrow_forwardQ1/ Describe the hypothalamic-pituitary-gonadal axis of hormone secretions and indicate the negative feedback look on this pathway.arrow_forwardNote: Explain and summarize the terms and ideas.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Biology 2eBiologyISBN:9781947172517Author:Matthew Douglas, Jung Choi, Mary Ann ClarkPublisher:OpenStaxBiology: The Dynamic Science (MindTap Course List)BiologyISBN:9781305389892Author:Peter J. Russell, Paul E. Hertz, Beverly McMillanPublisher:Cengage Learning
Biology 2e
Biology
ISBN:9781947172517
Author:Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher:OpenStax
Biology: The Dynamic Science (MindTap Course List)
Biology
ISBN:9781305389892
Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher:Cengage Learning