Preview

homeostasis

Good Essays
Open Document
Open Document
729 Words
Grammar
Grammar
Plagiarism
Plagiarism
Writing
Writing
Score
Score
homeostasis
Homeostasis maintains the body’s internal environment it allows organs and cells to function at their best. It keeps the body at steady state, this refers to the fact that conditions need to remain constant, if not then normal function would be disrupted. However there is a certain limit set , this is due to the changing values , rather they are maintained around an ideal value which is also known as the set point.
The skin regulates most of the body temperature and uses a mechanism called negative feedback with a control centre , receptor and effector in the nervous system, this is to reverse any change. The skin is divided into two layers: the epidermis and the dermis. The epidermis is the outer layer, this contains pores which sweat exits the body from. The dermis is the second layer underneath; this has most of the effectors used to control the body’s temperature.
With the change of body temperature, receptors, normally nerve endings, in the dermis encounter the change, then sends an impulse to the hypothalamus, the control centre in the brain. An impulse is then sent to the effectors in the skin and will respond in either increasing or decreasing temperature; this would depend on the change. Responses are carried out by the structure in the dermis. When temperature goes back to its set point the hypothalamus then stops sending impulses to the effectors. This process is the negative feedback.
Hair follicles are seen on the outside of the skin and are the root of the hairs. With the decrease of temperature, muscles attach to the follicle. The erector Pilli cause the hair to stand through contracting which in turn traps hair which acts as an insulator. With the increase of temperature the erector Pilli relaxes and hairs naturally lie flat. Blood vessels within the human body also play a vital part for the homeostasis of the body. Parker (2007) demonstrates the vasodilation process; this is dilation of the blood vessels once body temperature increases,

You May Also Find These Documents Helpful

  • Better Essays

    P5 Unit 5 homeostasis

    • 1143 Words
    • 4 Pages

    There are capillaries underneath your skin that can be filled with blood if you get too hot…

    • 1143 Words
    • 4 Pages
    Better Essays
  • Powerful Essays

    P5 - Homeostasis

    • 3122 Words
    • 13 Pages

    Homeostasis by definition is the technical term for the process of maintaining a constant internal environment despite changes in the external environment. The internal environment comprises of blood, tissue fluid, body cell contents and all metabolic processes taking place inside the body. This process is essential to the survival of a person and to our species as a whole. The liver, the kidneys, and the…

    • 3122 Words
    • 13 Pages
    Powerful Essays
  • Good Essays

    To maintain a constant body temperature feedback is needed. There are 3 types of feedback which are negative, positive and feedforward information. Negative feedback suggests that the process should be reduced, positive feedback tells the system to increase a response and feedforward information tells the system to change the set-point.…

    • 302 Words
    • 2 Pages
    Good Essays
  • Good Essays

    At higher body temperatures, more sweat is produced by sweat glands that cool the body when it evaporates. Therefore, blood vessels supplying the capillaries of the skin dilate, vasodilation, in which allows an increased blood flow through the skin’s capillaries which increases energy loss.…

    • 468 Words
    • 2 Pages
    Good Essays
  • Powerful Essays

    Homeostasis In Biology

    • 2110 Words
    • 9 Pages

    Homeostasis is the ability of an open system to regulate its internal environment to maintain stable conditions by means of multiple dynamic equilibrium adjustments controlled by interrelated regulation mechanisms. All living organisms, whether unicellular or multicellular, exhibit homeostasis.[35]…

    • 2110 Words
    • 9 Pages
    Powerful Essays
  • Good Essays

    Fig.10.3 The structure of the skin. 3. When the body is exercising vigorously or when the surrounding is hot: 1) Thermoreceptors in the skin detect an increase in environmental temperature or heat sensors in the hypothalamus detect a rise in the temperature of the blood. 2) The sweat glands increase the production of sweat. 3) Vasodilation, increases the internal diameter of blood vessels so that more blood is brought to the capillaries. 4) Body loses heat as sweat evaporates. 5) Body loses heat as more blood is brought to the skin surface, leading to increased heat loss by conduction, convection and radiation. 6) Metabolic rate is lowered leading to the decreased heat production by cells. 7) Body temperature is lowered. 4. When the body is at rest or when the surrounding is cold: 1) Thermoreceptors in the skin detect decrease in the environmental temperature or heat sensors in the hypothalamus detect drop in temperature of blood. 2) The sweat glands stop production of sweat. 3) Vasoconstriction, reduces the internal diameter of blood vessels so that less blood is brought to the capillaries. 4) Body gains heat as erector muscles in the skin contract causing the hairs to stand up, creating a layer of air which will act as insulation. 5) Skeletal muscles contract and relax repeatedly; this shivering resulting in production of heat. 6) Less blood is brought to the skin surface…

    • 4975 Words
    • 20 Pages
    Good Essays
  • Good Essays

    Our body also responds to temperature change (heat loss/gain). This is shown when we are cooling down as the metabolism speeds up, we shiver to produce heat and we experience vasoconstrictions which is the blood diverting through the lower skin levels to lessen the heat lost. It is also shown when we are warming up as the metabolism slows down, we sweat, we lose insulation by the relaxation of the hair erector lowering the hair meaning there is less of an insulating layer of warm air next to the skin and we experience vasodilatation which is when the blood comes to the surface and heat can be radiated…

    • 1604 Words
    • 7 Pages
    Good Essays
  • Better Essays

    It produces heat as a waste product which can make a rise in our body temperature. In order to maintain homeostasis, the blood vessels in our skin dilate to allow more blood flow to the surface of our body removing heat and causing sweat glands in the skin to release more sweat. The evaporation of sweat and breathing out warm air also help to cool our body which will help to maintain a constant temperature.…

    • 1787 Words
    • 8 Pages
    Better Essays
  • Good Essays

    1. I was sweating after jogging a mile because my body's internal temperature had gotten too high and I needed to cool down so my body used the extra internal heat to release sweat and at the same time keep homeostasis. The systems involved were my nervous system and my integumentary system.…

    • 520 Words
    • 2 Pages
    Good Essays
  • Satisfactory Essays

    Homeostasis Analogy

    • 323 Words
    • 2 Pages

    The stimulus: a decrease in external temperature causing a decrease in body temperature. The physiological responses will reverse the original stimulus, and the internal body temperature will begin to increase. The receptors are where the cells detect and register a change. It includes the Thermoreceptors in the skin, abdominal organs, spinal cord, and hypothalamus which will detect the decrease in temperature. The modulator is the where change is processed and information is relayed on. It includes the Hypothalamus which sends information from the nerve and hormonal systems to effectors. The effectors include skeletal muscles, blood vessels in the skin, cerebral cortex, and body cells that help adjust the amount of secretions the body puts out.…

    • 323 Words
    • 2 Pages
    Satisfactory Essays
  • Satisfactory Essays

    Homeostasis

    • 803 Words
    • 6 Pages

    the heat produced by the furnace shuts the furnace down through the thermostat. 2. the original stress is reduced, i.e., the room warms up. Homeostatic mechanisms that show these two characteristics are operating by negative feedback Homeostatic Regulation of Body Temperature through Negative Feedback Hyperthermia…

    • 803 Words
    • 6 Pages
    Satisfactory Essays
  • Satisfactory Essays

    Homeostasis is maintaining an Internal Balance. If we fail to maintain an internal balance every system inside of our body will be disrupted.…

    • 466 Words
    • 2 Pages
    Satisfactory Essays
  • Better Essays

    Negative feedback will occur when something changes from its normal in the body. The body then will come back with a response to cancel out the difference to bring it back to its normal. An example of this is if blood glucose level falls the body will then convert the glycogen in the body to glucose which will bring back the energy in the cells to its normal amount. This system requires receptors so that they are able to detect the change in your body. As well as receptors it also needs a control centre so that the information that has just been received can be processed to then give the correct response of what the body should do. Most of the control centres can be found in the brain. It will also need effectors so that after the change has happened and the body is back to normal it can reverse the change to keep the body at its original state.…

    • 1675 Words
    • 7 Pages
    Better Essays
  • Good Essays

    Hypothalamus

    • 267 Words
    • 2 Pages

    Cells in the anterior and posterior hypothalamic areas detect blood temperature and have connections that allow them to adjust to different body temperatures. Neural activity in the anterior area activates systems for heat loss, dilating blood vessels of the skin and causes sweating and panting. Neurons in the posterior hypothalamus help to preserve heat by constricting blood vessels of the skin, causing shivering and slows down your…

    • 267 Words
    • 2 Pages
    Good Essays
  • Good Essays

    Homeostasis is maintain by negative and positive feedback mechanism. Most homeostatic control mechanisms are negative feedback mechanisms. In these system, the output shut off the original stimulus or reduce its intensity. These mechanisms cause the variable to change in a direction opposite to that of the initial change, returning it to its “ideal” value, thus the name “negative” feedback mechanism. In positive feedback mechanisms, the result or response enhances the original stimulus so that the response is accelerated.…

    • 770 Words
    • 4 Pages
    Good Essays

Related Topics