Homeostasis: Negative Feedback, Body Temperature, Blood Glucose

Edited by Jamie (ScienceAid Editor), Rj, SmartyPants, Jen Moreau and 6 others

Contents
Ad

Homeostasis and Hormones

Homeostasis is the maintenance of a constant internal environment in response to a changing external environment. Hormones have an important role in this system. Hormones are made of proteins, they are released by glands into the bloodstream, where they reach target cells. A specific hormone will fit a specific receptor protein, and this brings about a change in that cell.

Was this helpful? Yes | No| I need help

Negative Feedback

Negative feedback is the mechanism by which the body maintains conditions within particular limits. The body will do this by opposing a change that deviates from the normal. The diagram below helps to explain this using the example of body temperature.

Was this helpful? Yes | No| I need help

negative feedback

Note that the opposite change takes the level too far below the normal, therefore a negative response backup will occur, and the process repeats itself, so that over time the temperature oscillates about the normal, within small limits.

Was this helpful? Yes | No| I need help

Body Temperature

It is important to maintain a constant temperature so that living organisms can maintain metabolism. There are two types of heat regulation: endothermic where the species controls their own temperature (mammals, birds), and ectothermic where temperature reflects the environmental temperature (lizards, fish).

Was this helpful? Yes | No| I need help

The temperature in mammals is detected by thermoreceptors in the skin and the hypothalamus which is in the brain. Changes in temperature bring about nerve impulses from the brain to the muscles and glands which will bring about changes depending on whether it is hot or cold.

Was this helpful? Yes | No| I need help


thermoregulation

Blood Glucose

The amount of glucose in your blood is carefully controlled. Again, this uses the hormonal system. The hormones responsible for regulating blood glucose are produced in the pancreas in particular areas called islets of Langerhans.

Was this helpful? Yes | No| I need help

the islets of langerhans

After you have eaten a meal, the blood glucose levels will begin to rise because the carbohydrates in the food are digested and absorbed. This rise is detected by beta cells, which then will produce more insulin. This insulin then binds to receptor proteins in cell membranes (particularly in the liver). This causes more protein channels to open so that more glucose can enter the cell. As well as this, insulin encourages enzymes to convert glucose to glycogen (glycogenesis) for storage.

Was this helpful? Yes | No| I need help

If however, you have been doing a lot of exercises, and glucose is being used up, then alpha cells will produce glucagon, this causes the release of an enzyme that breaks glycogen to glucose (glycogenolysis [gli-ko-jen-oh-li-sis]).

Was this helpful? Yes | No| I need help


Questions and Answers

Does sweating involve both the endocrine system and the nervous system?

Silly question, but is sweating an example of where both the nervous system and endocrine system work together? Electrical signals are sent to sweat glands, but as they're glands, surely that also makes it endocrine as well due to the secreting? (or exo as nothing is being secreted into the blood). In the hot/cold table, it is not clear which involves the endocrine system, and which involves the nervous system

Was this helpful? Yes | No| I need help

Sweating involves both the endocrine and the nervous systems. To regulate the body temperature, the following process happens. There are sensory receptors (part of the nervous system) that can feel the increase of body temperature. Once the body temperature increases, these small receptors feel the increase of the body temperature and send a message to the hypothalamus through sensory neurons. The hypothalamus (belongs to both endocrine and nervous systems), after interpreting the signal secretes a hormone that is carried out by the blood vessels to the sweat glands (effector organ). Once the sweat glands become activated by this hormone, they secrete sweat, thus releasing heat and reducing the body temperature to its normal.

Was this helpful? Yes | No| I need help

How does homeostatic help control my body temperature?

Using the terms receptors, control center, and effector, explain the homeostatic mechanisms involved in controlling body temperature. Need it for revision on the upcoming exam, don't fully understand it yet. I have tried: Reading other articles, visiting various sites, going over uni lectures. I think it was caused by: I don't understand the explanation, too much information, the way in which my lecturer explains it to me.

Was this helpful? Yes | No| I need help

To regulate the body temperature, the following process happens. There are sensory receptors that can feel the increase of body temperature. These sensory receptors are like small detectors that can sense any change in the temperature of the body. Once the body temperature increases, these small receptors feel the change and send a message to the hypothalamus through sensory neurons. The hypothalamus (the control center in the brain for the regulation of homeostasis), after interpreting the signal secretes a hormone that is carried out by the blood vessels to the sweat glands (effector organ). Once the sweat glands become activated by this hormone, they secrete sweat, thus releasing heat and reducing the body temperature to its normal.

Was this helpful? Yes | No| I need help

See more questions like this: Thermoregulation: Describe how the body's homeostatic mechanisms respond to a rise in temperature?

Describe generally how a NEGATIVE feedback loop works it comes to temperature regulation of the body?

Describe generally how a NEGATIVE feedback loop works it comes to temperature regulation of the body. Nerves and Hormones. . . HW PROBLEM. The question is not directly covered

Once the body temperature increases, the hypothalamus is activated that in turn activates the sweat glands to release sweat and reduce the body temperature. When the body temperature decreases, this message is sent to the hypothalamus by a negative feedback to stop activating the sweat glands. Thus, when the sweat glands are not activated, no sweat is released and the temperature returns to its normal value. (Remember the body temperature should remain constant at all times, therefore, after some time the release of heat should stop and this is done by a negative feedback mechanism)

Was this helpful? Yes | No| I need help

See more questions like this: Why is blood temperature a negative feedback loop?

An important aspect of homeostasis is maintaining a normal body temperature?

An important aspect of homeostasis is maintaining a normal body temperature. Describe the homeostatic feedback system that would be activated in response to a decreased external temperature

Yes, homeostasis is important to keep everything in the body balanced. The temperature of the body is around 37ºC at all times. If this temperature decreases, it will result in hypothermia (low body temperature), and when it increases it will result in hyperthermia (high body temperature). Both cases are not healthy for the body to function properly and can lead to problems and diseases. When it is cold outside, our body temperature also drops (below 37ºC). The receptors on the blood vessels, that detect these signals, are activated and transmit signals to activate the hypothalamus. The hypothalamus will send signals to the blood vessels. The blood vessels will start constricting to retain heat. It also sends signals to the sweat glands and as a result, these glands will stop secreting sweat. The skeletal muscles are also alerted by the hypothalamus that starts shivering to warm up the muscles and produce heat.

Was this helpful? Yes | No| I need help

Describe the homeostatic feedback system that would be activated in response to a decreased external temperature?

ScienceAid QnA. This section is not written yet. Want to join in? Click EDIT to write this answer.

See more questions like this: Homeostasis feedback system respond to a decreased external temperature?

Hi Jamie, I need some more information about Negative feedback in homeostasis?

I have a 400 essay about negative feedback of homeostasis. I am searching to find some useful information to add into my essay. if you have academic sources, I would be more than happy to have them. thanks

Was this helpful? Yes | No| I need help

Hi, In order to write a good essay about negative feedback of homeostasis, first you should start your essay by defining homeostasis. Then, explain the two types of homeostasis. Talk briefly about positive feedback, and then mention that this essay is about the negative feedback. After explaining negative feedback mechanism, give examples to go deeper into how negative feedback works. And as a conclusion end your essay about the importance of negative feedback mechanism.

Was this helpful? Yes | No| I need help

I don't know if you are at school or university or college to give you links to reference your essay. You can use the references listed at the bottom of this page. If you are at university and want to go deeper into research and explanation, you can access scientific journals and articles through PubMed, and if you are at school, then refer to your book or check encyclopedia online.

Was this helpful? Yes | No| I need help

See more questions like this: Negative feedback in homeostasis the role it plays?

Hi Jamie, what is the role in the homeostatic negative feedback system for decreased in external temperature?

During cold weather, our body's become cold. How does our body generate heat through the use of the 3 components receptors, effectors and response?

ScienceAid QnA. This section is not written yet. Want to join in? Click EDIT to write this answer.

How is skin involved in either in negative or positive feedback mechanisms?

In details, how is skin involved in either negative or positive feedback mechanisms

ScienceAid QnA. This section is not written yet. Want to join in? Click EDIT to write this answer.

The brain responded to the demands of exercise by increasing respiration and heart rate. How do these changes contribute to the maintenance of homeostasis?

Must discuss oxygen levels, CO2 levels, cellular respiration, skeletal muscles

ScienceAid QnA. This section is not written yet. Want to join in? Click EDIT to write this answer.

How does the body maintain the blood gas concentrations?

Why do the pH values matter during exercise, I'm not quite sure about these questions

ScienceAid QnA. This section is not written yet. Want to join in? Click EDIT to write this answer.

Can you explain negative feedback steps for homeostasis of blood glucose levels including effector input/output etc?

Having trouble figuring out which receptors are involved! Just need a wee bit more detail in blood glucose regulation - also is there another name for the Isle of Langerhans? I have tried: Have researched online but using different terminology. I think it was caused by: Maybe difference in terminology, just need to detail with 5 steps

Was this helpful? Yes | No| I need help

ScienceAid QnA. This section is not written yet. Want to join in? Click EDIT to write this answer.

See more questions like this: Draw a diagram to illustrate the role of negative feedback in homeostasis. On your diagram explain the role of receptors, control center, and effectors?

Hi Jamie.Why do body cells need glucose?Which system activated in response to elevated blood sugar level?

Sorry my question is why do body cells need glucose?

ScienceAid QnA. This section is not written yet. Want to join in? Click EDIT to write this answer.

Negative feedback mechanism in thyroid gland? homeostasis definition and how does it influence the body?

How the thyroid gland stimulated to secrete its hormone, which hormone is mostly secreted by the thyroid gland, Under which influence is the hormone secreted? what influence does it have to body?. . in details. I just want to know how the whole process works in our body.

Was this helpful? Yes | No| I need help

ScienceAid QnA. This section is not written yet. Want to join in? Click EDIT to write this answer.

See more questions like this: How the feedback mechanism works and how it helps keep the body in homeostasis?

What kind of feedback mechanism acts on regulating blood temperature?

Negative or positive feedback system according to hypothalamus function?

ScienceAid QnA. This section is not written yet. Want to join in? Click EDIT to write this answer.

See more questions like this: Mechanism that helps in temperature regulation in the body of living organisms?

Homeostasis and thermoregulation are related to each other?

How is thermoregulation is negative feedback ( push ). No, it is same but unable to co- relate these two concepts. I have tried: I am working on thermoregulation and I read few articles on it. I think it was caused by: I think I didn't understand negative feedback. So please tell me about negative feedback

Was this helpful? Yes | No| I need help

ScienceAid QnA. This section is not written yet. Want to join in? Click EDIT to write this answer.

I want to know more thyroid gland and its hormone?

When does thyroid gland release the hormone? How does the hormone work in the body? Examples of when it is released. Where can I find that information because I have not found it yet? I have tried: I just looked in this article of homeostasis but I do not see anything about thyroid gland. I think it was caused by: But I do not see the heading of thyroid, or can you please tell me what can I search in order to get it

Was this helpful? Yes | No| I need help

ScienceAid QnA. This section is not written yet. Want to join in? Click EDIT to write this answer.

Referencing this Article

If you need to reference this article in your work, you can copy-paste the following depending on your required format:

APA (American Psychological Association)
Homeostasis: Negative Feedback, Body Temperature, Blood Glucose. (2017). In ScienceAid. Retrieved Jul 20, 2017, from https://scienceaid.net/biology/humans/homeostasis.html

Was this helpful? Yes | No| I need help

MLA (Modern Language Association) "Homeostasis: Negative Feedback, Body Temperature, Blood Glucose." ScienceAid, scienceaid.net/biology/humans/homeostasis.html Accessed 20 Jul 2017.

Chicago / Turabian ScienceAid.net. "Homeostasis: Negative Feedback, Body Temperature, Blood Glucose." Accessed Jul 20, 2017. https://scienceaid.net/biology/humans/homeostasis.html.

If you have problems with any of the steps in this article, please ask a question for more help, or post in the comments section below.

Comments

ScienceAid welcomes all comments. If you do not want to be anonymous, register or log in. It is free.

Article Info

Categories : Humans

Recent edits by: Bokolo, Sharingknowledge, Nikam

Share this Article:

Thanks to all authors for creating a page that has been read 20,753 times.

Do you have a question not answered in this article?
Click here to ask one of the writers of this article
x

Thank Our Volunteer Authors.

Would you like to give back to the community by fixing a spelling mistake? Yes | No