Homeostasis is the ability of an organism or system to maintain a stable, internal environment despite external changes. It is a fundamental biological concept that is crucial for the proper functioning of living organisms. Homeostasis is maintained through the coordinated actions of various physiological mechanisms that work to keep certain parameters within a specific range.
In the human body, examples of systems that are maintained in a state of homeostasis include body temperature, blood pressure, blood glucose levels, pH balance, and fluid balance. For example, when body temperature rises, the body initiates sweating, which helps to cool the body down and maintain its temperature within a narrow range.
Homeostasis is essential for the survival of living organisms, as even small variations from the optimal range can have significant negative consequences. Imbalances or disruptions of homeostasis can result in diseases or disorders, such as hypertension, diabetes, and acid-base imbalances. Therefore, understanding and maintaining homeostasis is critical to achieving and maintaining optimal health.
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- You are designing an experiment to determine if you can make desert kangaroo rats active at noon. At noon the ground and air are warmer than the internal temperature of the rats. You decide to provide the kangaroo rats with enough water to ensure they can maintain body temperature homeostasis. Based on a simplified model, you determine that at noon, kangaroo rats: - Absorb 8 watts of radiation - Generate 1 watt of metabolic heat - Re-radiate 1 watt - Exchange a total of 2 watts with the surrounding desert ground and air via conduction - Exchange 4 watts through convective processes The kangaroo rat is not in energy balance. Since kangaroo rats lose 1 watt through latent heat (i.e. evaporative cooling) with each 2 ml of water consumed, how much water would you need to provide the kangaroo rat so that it can reach homeostasis? 04 8. O 12 O24 O 28 32arrow_forwardhelparrow_forwardQuestion 2 O F2 W S X Homeostasis is the ability of the body to Selected Answer: Answers: Question 3 #3 Positive feedback: 20 F3 E D $ 4 C mical signals and neurotransmitters are electrical signals Hormones travel through the blood, neurotransmitters travel through the interstitial fluid Hormones are part of the bodys response to a stimulus, and neurotransmitters are not keep conditions in the internal environment exactly the same at all times keep conditions in the internal environment exactly the same at all times quickly restore changed conditions to normal ignore external stimuli to remain in a state of rest F4 R prevent excessive blood loss prevent the external environment from changing F do L % ů F5 T 6 MacBook Air F6 Y 7 G H F7 U * 00 8 DII F8 1 9 ▷▷ V B N M F9 J J K O O F10 L L *arrow_forward
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