8 Responses – Biology Students’ Assignment


1) J.W      Re: Topic 5 DQ 1

Don't use plagiarized sources. Get Your Custom Essay on
8 Responses – Biology Students’ Assignment
Just from $10/Page
Order Essay

Professor and class,

Homeostasis is important to the organism, it keeps the state of the internal conditions of the organism stable. Two forms of feedback help in this process, they are negative and positive feedback loops. These loops help to control the body’s temperature, pressure, blood and tissue chemistry. The control center for the feedback loops are found in the brain. (BiologyDictionary, 2018) When disruptions occur the brain sends messages to the body’s organs alerting them to return to the normal range. Negative feedback loops act to stop or reverse processes which go outside the body’s normal range achieving equilibrium, whereas positive feedback intensifies the change in the body’s physiological condition thus pushing it out of range. (BiologyDictionary, 2018) Negative feedback occurs more frequently in the body when disease interrupts its mechanisms bringing it back to equilibrium. Positive feedback amplifies disruptions and thus may lead to even more problems, even death. Positive feedback usually needs an external interruption to occur for it to stop whereas negative feedback ends on its own when stability is achieved. Negative feedback resists change whereas positive feedback supports it and thus may lead to instability.

Some examples of negative feedback loops are the regulation of blood pressure, blood sugar, blood gases, blood pH, fluid balance, and erythropoiesis (red blood cell production). In terms of thermoregulation, when it is very hot, the body activates the sympathetic nervous system to cause sweat glands to produce sweat which evaporates and thus cools down the skin and blood vessels. When it is cold outside, the body shivers creating vasoconstriction which reduces blood flow to the limbs and redirects it to the veins and arteries in the blood transferring heat and creating warmth for the body. Some examples of positive feedback loops are blood clotting and the release of hormones via the endocrine system. This system releases oxytocin which increases contractions during childbirth to help to push the baby out. Blood clotting occurs as a series of events via the positive feedback loop when the body tissues are damaged in order to form clots and stop bleeding.

2) A.W       Re: Topic 5 DQ 1

Negative feedback loops control most process in our bodies. These are done to help maintain homeostasis or a specificlevel that the body needs to be at in order to function properly. Temperature and blood pH levels are examples things that need to be maintained and stay at a specific range or the body will shut down. If acid builds up and can’t be lowered you can become confused, tired, get a headache, increased heart rate, and have fruity breath (Allen, 2018). If this happens a negative feedback will occur that will cause the body to lower the pH in the blood. Negative feedback loops are so good at this since it reacts to a scale and if it getstoo high or too low the body does what it needs to bring it back to the comfort range (Khan Academy, 2021). It takes less energy to react and fix something then to constantly maintain the system. If the system needs a push to complete a positive feedback loop can be started. This happens during childbirth when the baby’s head starts to push on the cervix. This startsa reaction of hormones that help with contractions that don’t stop till the baby is out (Khan Academy, 2021).

Allen, Suzanne. 2018. Healthline. Acidosis. Retrieved on 2/17/2021 from https://www.healthline.com/health/acidosis

Khan Academy. 2021. Homeostasis. Retrieved on 2/17/2021 from https://www.khanacademy.org/science/high-school-biology/hs-human-body-systems/hs-body-structure-and-homeostasis/a/homeostasis

3) T. M.     Re: Topic 5 DQ 1

Homeostasis is when the body is kept at a stable place by reacting to negative and positive loops. Negative feedback Is a process where the body will respond to a variable to bring it back to homeostasis. The body will reverse the change. Body temperature is a good example. When your body goes up in temperature the body begins to sweat to cool you off or you may enter a room that is air-conditioned and the body will begin to shake, you get chills and this reaction causes the muscles to react and this makes your body warm again. These actions will bring the body back to homeostasis with the negative loop system,

With the positive feedback loop, positive feedback will trigger another reaction until reaction. A positive feedback example is with childbirth. When a woman is in labor she has contractions to help dilate her uterus. With every contraction, oxytocin is released bringing on more contractions causing dilation, and eventually birth after birth the body returns to a homeostatic state.  Sometimes other negative feedback will react to positive feedback.


Anatomy and Physiology. ( 2013) , May 18. Homeostasis: positive/ negative feedback mechanism. Homeostasis: positive/ negative feedback mechanisms : Anatomy & Physiology (anatomyandphysiologyi.com)

4)J.W  Re: Topic 5 DQ 1

Hello Marie,

The endocrine system plays a very significant role maintaining homeostasis in the body. It uses the feedback loop system in order to function effectively. This system which is composed of glands produce hormones that control our bodily functions. “The feedback loop acts like a “thermostat” which responds to changes in the temperature and informs the furnace when to switch it on or off.” (Thyroid Advisor, 2019) The hypothalamus acts like the thermostat of feedback systems and the endocrine system acts like the air conditioner or heater. Hormones are either released or stop being produced in response to messages sent by the hypothalamus. When a signal is received, a hormonal response takes place and a reaction occurs. Glands which do not constantly secrete hormones rely on the presence or absence of hormones in the blood to turn their secretions on or off. If there is not enough secretion in the blood, the gland makes more, increasing blood hormone level. If there is too much hormone, the gland stops making it thus leading to lower blood hormone levels. The feedback system is the basis for the mechanism of the endocrine system.



Thyroid Advisor (2019, April 9) What You Need To Know About The Thyroid Feedback Loop. Retrieved from https://thyroidadvisor.com/know-thyroid-feedback-loop/#:~:text=Feedback%20loops%20refer%20to%20the%20manner%20that%20the,are%20responses%20that%20trigger%20other%20processes%20and%20activities.

Tulane University (n.d) E. Hormone. A Gateway To Environmental Signaling. Endocrine System: Feedback Loops. Retrieved from http://e.hormone.tulane.edu/learning/feedback-loops.html


1) A.W       Re: Topic 5 DQ 2

Osmoregulation is the process that allows us to maintain the level of fluids in our bodies. We need proper balance of fluids for our cells and organs to work properly. Water pressure goes from high to low or least amount of resistance. To change these levels the body can send out hormones that regulate pressure to help dictate where the fluid needs to go in order to maintain homeostasis. Another process that mammals use to maintain fluid levels is changing the size of the arteries (NCBI, 2021). By constricting the artery, you increase the pressure and by dilating them you decrease the pressure. This changes the flow and helps balance out the fluids.

2) J.W     Topic 5 DQ 2

Professor and class,

Osmoregulation is very important to the survival of living things, and mammals have specially designed systems in place to make sure that this process works efficiently to maintain homeostasis within the body. Osmoregulation is the process by which the body regulates the osmotic pressure of fluids. It does this by keeping the water level constant (cells remain isotonic) and thus maintaining homeostasis. (Homeostasis in Humans, n.d) This process maintains a proper balance of electrolytes and non-electrolytes (solutes which dissociate in to ions when dissolved in water and those that do not dissociate when dissolved, respectively) within the cells, tissues and in interstitial fluid by diffusion of water or solutes, and osmosis. Water movement due to osmotic pressure across membranes alter the fluid compartment (blood plasma, cytosol, interstitial fluid) within the body which influences medical issues such as blood pressure. Water balance is regulated by urination, defecation, sweating and respiration. (Boundless, 2020) Within the body, the tissues and organs are immersed in fluid which helps to maintain homeostasis. Some solutes within the body which are involved in osmoregulation are salts and sugars. Osmoregulation maintains salt and water balance. Mammals regulate their osmotic pressure by maintaining normal levels of concentrations of electrolytes found in plasma, extracellular and intracellular fluid. When disease or trauma affects the body’s ability to carry out the process of osmoregulation many issues may arise such as the accumulation of toxic waste or water which may cause edema (swelling). When a person’s kidneys are failing, the body’s ability to regulate fluid balance and excrete toxic waste are affected, thus their osmoregulation and homeostasis become inefficient leading to other medical problems.



Boundless. (2020, August 15) Biology LibreTexts. Introduction to Osmoregulation. Retrieved from https://bio.libretexts.org/Bookshelves/Introductory_and_General_Biology/Book%3A_General_Biology_(Boundless)/41%3A_Osmotic_Regulation_and_the_Excretory_System/41.1%3A_Osmoregulation_and_Osmotic_Balance/41.1A%3A_Introduction_to_Osmoregulation

Homeostasis in Humans (n.d) Homeostasis. Blood Water Homeostasis or Osmoregulation. Retrieved from https://homeostasisinhumans.weebly.com/osmoregulation.html

3) missing , coming back later

4) missing , come back later

Get Professional Assignment Help Cheaply


Are you busy and do not have time to handle your assignment? Are you scared that your paper will not make the grade? Do you have responsibilities that may hinder you from turning in your assignment on time? Are you tired and can barely handle your assignment? Are your grades inconsistent?

Whichever your reason may is, it is valid! You can get professional academic help from our service at affordable rates. We have a team of professional academic writers who can handle all your assignments.

Our essay writers are graduates with diplomas, bachelor’s, masters, Ph.D., and doctorate degrees in various subjects. The minimum requirement to be an essay writer with our essay writing service is to have a college diploma. When assigning your order, we match the paper subject with the area of specialization of the writer.

Why Choose Our Academic Writing Service?


  • Plagiarism free papers
  • Timely delivery
  • Any deadline
  • Skilled, Experienced Native English Writers
  • Subject-relevant academic writer
  • Adherence to paper instructions
  • Ability to tackle bulk assignments
  • Reasonable prices
  • 24/7 Customer Support
  • Get superb grades consistently

How It Works

1. Place an order

You fill all the paper instructions in the order form. Make sure you include all the helpful materials so that our academic writers can deliver the perfect paper. It will also help to eliminate unnecessary revisions.

2. Pay for the order

Proceed to pay for the paper so that it can be assigned to one of our expert academic writers. The paper subject is matched with the writer’s area of specialization.

3. Track the progress

You communicate with the writer and know about the progress of the paper. The client can ask the writer for drafts of the paper. The client can upload extra material and include additional instructions from the lecturer. Receive a paper.

4. Download the paper

The paper is sent to your email and uploaded to your personal account. You also get a plagiarism report attached to your paper.

Order a unique copy of this paper
(550 words)

Approximate price: $22

Basic features
  • Free title page and bibliography
  • Unlimited revisions
  • Plagiarism-free guarantee
  • Money-back guarantee
  • 24/7 support
On-demand options
  • Writer’s samples
  • Part-by-part delivery
  • Overnight delivery
  • Copies of used sources
  • Expert Proofreading
Paper format
  • 275 words per page
  • 12 pt Arial/Times New Roman
  • Double line spacing
  • Any citation style (APA, MLA, Chicago/Turabian, Harvard)

Our guarantees

We value our customers and so we ensure that what we do is 100% original..
With us you are guaranteed of quality work done by our qualified experts.Your information and everything that you do with us is kept completely confidential.

Money-back guarantee

You have to be 100% sure of the quality of your product to give a money-back guarantee. This describes us perfectly. Make sure that this guarantee is totally transparent.

Read more

Zero-plagiarism guarantee

The Product ordered is guaranteed to be original. Orders are checked by the most advanced anti-plagiarism software in the market to assure that the Product is 100% original. The Company has a zero tolerance policy for plagiarism.

Read more

Free-revision policy

The Free Revision policy is a courtesy service that the Company provides to help ensure Customer’s total satisfaction with the completed Order. To receive free revision the Company requires that the Customer provide the request within fourteen (14) days from the first completion date and within a period of thirty (30) days for dissertations.

Read more

Privacy policy

The Company is committed to protect the privacy of the Customer and it will never resell or share any of Customer’s personal information, including credit card data, with any third party. All the online transactions are processed through the secure and reliable online payment systems.

Read more

Fair-cooperation guarantee

By placing an order with us, you agree to the service we provide. We will endear to do all that it takes to deliver a comprehensive paper as per your requirements. We also count on your cooperation to ensure that we deliver on this mandate.

Read more

Calculate the price of your order

550 words
We'll send you the first draft for approval by September 11, 2018 at 10:52 AM
Total price:
The price is based on these factors:
Academic level
Number of pages
error: Content is protected !!
Open chat
You can contact our live agent via WhatsApp! Via +1 817 953 0426

Feel free to ask questions, clarifications, or discounts available when placing an order.

Order your essay today and save 30% with the discount code STARS