https://www.khanacademy.org/science/ap-biology/cell-communication-and-cell-cycle/feedback/v/homeostasis 2023-08-07T17:09:37.131449861Z Homeostasis Homeostasis, or maintaining a steady body temperature, is achieved through feedback mechanisms. Exposure to extreme temperatures triggers physiological responses like shivering or sweating, ensuring a constant core temperature. Homeostasis also extends to regulating blood pressure and sugar levels. MIT+K12 video https://cdn.kastatic.org/googleusercontent/JAsQfmwdw08JzT_LPjuy_hv1s-mjxTQSOLsTIpFFNQnMwoK60U0B5-thJW-M96J827v1fNFCUEw8Z5bGV5GJbQ_Y Homeostasis Homeostasis, or maintaining a steady body temperature, is achieved through feedback mechanisms. Exposure to extreme temperatures triggers physiological responses like shivering or sweating, ensuring a constant core temperature. Homeostasis also extends to regulating blood pressure and sugar levels. https://cdn.kastatic.org/ka-youtube-converted/rSBbnHLR_cg.mp4/rSBbnHLR_cg.mp4 220 Maintaining homeostasis https://www.khanacademy.org/science/ap-biology/cell-communication-and-cell-cycle/feedback/a/homeostasis 2021-04-29T08:03:23Z Homeostasis Learn how organisms maintain homeostasis, or a stable internal environment. article https://www.khanacademy.org/science/health-and-medicine/advanced-muscular-system/skeletal-system-introduction/v/skeletal-endocrine-control 2023-08-17T23:33:36.770424498Z Skeletal endocrine control Uncover the pivotal role of the skeletal system in our body, from offering structure to facilitating motion. Learn how bones, cartilage, and ligaments synergize, and investigate the minute structure of bone. Delve into the endocrine regulation of the skeletal system and its significance for overall wellness. Tracy Kim Kovach video https://cdn.kastatic.org/googleusercontent/woBpIViMO_vSssamtlFcjGkMOivaa_WieNcROP4yFRKiseFDiRnHUeK1S754pDgT1N1byI3yaxgIWpLe1zNqd8GG Skeletal endocrine control Uncover the pivotal role of the skeletal system in our body, from offering structure to facilitating motion. Learn how bones, cartilage, and ligaments synergize, and investigate the minute structure of bone. Delve into the endocrine regulation of the skeletal system and its significance for overall wellness. https://cdn.kastatic.org/ka-youtube-converted/csp08ICfOC4.mp4/csp08ICfOC4.mp4 502 Maintaining homeostasis https://www.khanacademy.org/science/health-and-medicine/circulatory-system/circulatory-system-introduction/v/thermoregulation-in-the-circulatory-system 2023-08-17T23:33:36.770424498Z Thermoregulation in the circulatory system Explore how the body maintains its core temperature during exercise. Discover the role of skin acting as insulation and how blood vessels, through vasodilation and vasoconstriction, regulate heat loss. Understand why maintaining a body temperature of 98.6 degrees Fahrenheit is crucial for optimal chemical reactions. Patrick van Nieuwenhuizen video https://cdn.kastatic.org/googleusercontent/ZoV8jV0r8Ts9FxUs3rbv34JZycn4wiKsYDA-c7yEWZKZzZoFODBLwBFRIEux5uBLNMZYX1sfqjCvfNV9ddczRjs Thermoregulation in the circulatory system Explore how the body maintains its core temperature during exercise. Discover the role of skin acting as insulation and how blood vessels, through vasodilation and vasoconstriction, regulate heat loss. Understand why maintaining a body temperature of 98.6 degrees Fahrenheit is crucial for optimal chemical reactions. https://cdn.kastatic.org/ka-youtube-converted/C_LiAEjuIIc.mp4/C_LiAEjuIIc.mp4 422 Maintaining homeostasis https://www.khanacademy.org/science/health-and-medicine/human-anatomy-and-physiology/lung-introduction/v/thermoregulation-in-the-lungs 2023-08-17T23:33:36.770424498Z Thermoregulation in the lungs Discover how dogs and humans use their respiratory systems for thermoregulation. Learn why panting helps dogs cool down, and how humans also expel heat through breathing. Explore the concept of thermoregulation in the lungs and its role during exercise. Patrick van Nieuwenhuizen video https://cdn.kastatic.org/googleusercontent/J0sbQrKqTKUWLlCzvN0LY0xY6EEuuzOtrhdQD30WsAKwIgQx6CNObnCPFHBTQTBwwavsTCaERyvziQQveq3jO9Q Thermoregulation in the lungs Discover how dogs and humans use their respiratory systems for thermoregulation. Learn why panting helps dogs cool down, and how humans also expel heat through breathing. Explore the concept of thermoregulation in the lungs and its role during exercise. https://cdn.kastatic.org/ka-youtube-converted/Iya-2bS14ho.mp4/Iya-2bS14ho.mp4 293 Maintaining homeostasis https://www.khanacademy.org/science/health-and-medicine/gastro-intestinal-system/gastrointestinal-intro/v/endocrine-pancreas 2023-08-17T23:33:36.770424498Z Endocrine pancreas The endocrine pancreas, a key player in diabetes, releases hormones that travel throughout the body. It houses alpha, beta, and delta islet cells, each with unique roles. Alpha cells release glucagon, which breaks down glycogen into glucose. Beta cells release insulin, which builds glucose into glycogen and is crucial in diabetes management. Delta cells release somatostatin, inhibiting other hormones. Understanding these functions is essential for tackling diabetes. Raja Narayan video https://cdn.kastatic.org/googleusercontent/mSirEEtMGKetZXMEmeyM_zElPyynGEcM0hfjxAVqQ05SCcLLnFtha2Be82t7156NL0Y_NeLQeSwO-0P_Wd2_YrMn Endocrine pancreas The endocrine pancreas, a key player in diabetes, releases hormones that travel throughout the body. It houses alpha, beta, and delta islet cells, each with unique roles. Alpha cells release glucagon, which breaks down glycogen into glucose. Beta cells release insulin, which builds glucose into glycogen and is crucial in diabetes management. Delta cells release somatostatin, inhibiting other hormones. Understanding these functions is essential for tackling diabetes. https://cdn.kastatic.org/ka-youtube-converted/xNf--q0YMq8.mp4/xNf--q0YMq8.mp4 410 Maintaining homeostasis https://www.khanacademy.org/science/shs-biology-2/x2ea931c66bba6acd:unit-1-name/x2ea931c66bba6acd:homeostasis/a/hs-body-structure-and-homeostasis-review 2021-04-29T07:57:02Z Body structure and homeostasis review article https://www.khanacademy.org/science/shs-biology-2/x2ea931c66bba6acd:unit-1-name/x2ea931c66bba6acd:homeostasis/e/body-structure-and-homeostasis 2021-04-29T07:57:48Z Body structure and homeostasis Test your knowledge of body structure and homeostasis! Ashley exercise https://www.khanacademy.org/science/shs-biology-2/x2ea931c66bba6acd:unit-1-name/x2ea931c66bba6acd:homeostasis/e/hs-body-structure-and-homeostasis 2022-10-17T09:39:47.683040654Z Body structure and homeostasis Test your knowledge of body structure and homeostasis! Ashley exercise https://www.khanacademy.org/science/ap-biology/cell-structure-and-function/plasma-membranes/v/fluid-mosaic-model-of-cell-membranes 2024-06-28T21:04:33.970147436Z Fluid mosaic model of cell membranes The fluid mosaic model explains the structure of cell membranes. These membranes are composed of phospholipids, forming a bilayer with hydrophilic heads facing outwards and hydrophobic tails facing inwards. Proteins, glycolipids, glycoproteins, and cholesterol are embedded within this bilayer, creating a diverse "mosaic". The "fluid" aspect refers to the flexibility and movement within the membrane, maintaining separation between the cell's interior and exterior. Sal Khan video https://cdn.kastatic.org/googleusercontent/OANXnaQoXmd-6-vlyX0lVAIuHYjNz65PuAzGhdele8AZ4fFSOjGFkL2gFnm9426GD_RyuWvmqnxBbgxqkXnFNLGb Fluid mosaic model of cell membranes The fluid mosaic model explains the structure of cell membranes. These membranes are composed of phospholipids, forming a bilayer with hydrophilic heads facing outwards and hydrophobic tails facing inwards. Proteins, glycolipids, glycoproteins, and cholesterol are embedded within this bilayer, creating a diverse "mosaic". The "fluid" aspect refers to the flexibility and movement within the membrane, maintaining separation between the cell's interior and exterior. https://cdn.kastatic.org/ka-youtube-converted/cP8iQu57dQo.mp4/cP8iQu57dQo.mp4 527 Maintaining homeostasis https://www.khanacademy.org/science/ap-biology/cell-structure-and-function/membrane-transport/v/introduction-to-passive-and-active-transport 2023-09-14T11:22:40.102153098Z Introduction to passive and active transport Active transport requires energy to move substances against a concentration or electrical gradient, like a canoeist paddling upstream. Passive transport, on the other hand, does not require energy as substances move along their gradient, similar to a canoeist drifting downstream. The sodium-potassium pump is a key example of active transport. Sal Khan video https://cdn.kastatic.org/googleusercontent/fdWO9Yuei6p31qnT761hfXD49OujsJrLlCUkyOZ9fqqBliHjpxCgUmtZzli5EqJlXRbf1Jwzc8Zps-EiJpi5IDvW Introduction to passive and active transport Active transport requires energy to move substances against a concentration or electrical gradient, like a canoeist paddling upstream. Passive transport, on the other hand, does not require energy as substances move along their gradient, similar to a canoeist drifting downstream. The sodium-potassium pump is a key example of active transport. https://cdn.kastatic.org/ka-youtube-converted/TsoAA7zOyj8.mp4/TsoAA7zOyj8.mp4 486 Maintaining homeostasis https://www.khanacademy.org/science/strengthened-shs-biology-2/x62f5297cda63eb8d:plant-organ-systems/x62f5297cda63eb8d:maintaining-homeostasis/a/homeostasis-and-cellular-transport 2026-03-25T13:20:47.939559562Z Homeostasis and cellular transport Learn about passive transport, active transport, bulk transport, and what can happen when cellular transport is disrupted. article https://www.khanacademy.org/science/strengthened-shs-biology-2/x62f5297cda63eb8d:plant-organ-systems/x62f5297cda63eb8d:maintaining-homeostasis/e/understand-homeostasis-and-cellular-transport 2024-06-28T21:04:33.970147436Z Understand: homeostasis and cellular transport Check your understanding of homeostasis and cellular transport in this set of free, standards-aligned practice questions. Megan Cohn exercise https://www.khanacademy.org/science/strengthened-shs-biology-2/x62f5297cda63eb8d:plant-organ-systems/x62f5297cda63eb8d:maintaining-homeostasis/e/apply-homeostasis-and-cellular-transport 2024-06-28T21:04:33.970147436Z Apply: homeostasis and cellular transport Apply your understanding of homeostasis and cellular transport in this set of free, standards-aligned practice questions. Megan Cohn exercise https://www.khanacademy.org/science/ap-biology/cell-communication-and-cell-cycle/feedback/v/hormone-concentration-metabolism-negative-feedback 2023-08-01T14:47:57.913483072Z Hormone concentration metabolism and negative feedback Hormone concentration in our bodies is tightly regulated through metabolism, excretion, and feedback loops. The liver, kidneys, and sweat glands help remove excess hormones. Negative feedback loops, where hormone action suppresses further hormone release, play a crucial role in maintaining hormonal balance and homeostasis. Ryan Scott Patton video https://cdn.kastatic.org/googleusercontent/dTt_UyOZpUUvjybfXrqdrJeZK_Q101pmh05goXA8tbglzdYKLEk86XxLMf4r4eshPMP05-p2P-TThzFKZNmdcgaLkQ Hormone concentration metabolism and negative feedback Hormone concentration in our bodies is tightly regulated through metabolism, excretion, and feedback loops. The liver, kidneys, and sweat glands help remove excess hormones. Negative feedback loops, where hormone action suppresses further hormone release, play a crucial role in maintaining hormonal balance and homeostasis. https://cdn.kastatic.org/ka-youtube-converted/RycF0ub2Al0.mp4/RycF0ub2Al0.mp4 287 Maintaining homeostasis https://www.khanacademy.org/science/hs-bio/x230b3ff252126bb6:from-cells-to-organisms/x230b3ff252126bb6:homeostasis/a/homeostasis-and-feedback-loops 2024-05-09T17:42:08.599818576Z Homeostasis and feedback loops Learn about homeostasis in organisms, and about negative and positive feedback loops. article https://www.khanacademy.org/science/hs-bio/x230b3ff252126bb6:from-cells-to-organisms/x230b3ff252126bb6:homeostasis/a/positive-feedback-loop-examples 2024-05-09T17:42:08.599818576Z Positive feedback loop examples Learn about the positive feedback loops that aid in childbirth, fruit ripening, and blood clotting. article https://www.khanacademy.org/science/hs-bio/x230b3ff252126bb6:from-cells-to-organisms/x230b3ff252126bb6:homeostasis/a/negative-feedback-loop-examples 2024-05-09T17:42:08.599818576Z Negative feedback loop examples Learn about the negative feedback loops that maintain body temperature, breathing rate, blood glucose levels, and more. article https://www.khanacademy.org/science/hs-bio/x230b3ff252126bb6:from-cells-to-organisms/x230b3ff252126bb6:homeostasis/e/understand-homeostasis-and-feedback-loops 2026-04-08T01:15:04.085520103Z Understand: homeostasis and feedback loops Check your understanding of homeostasis and feedback loops in this set of free, standards-aligned practice questions. Megan Cohn exercise https://www.khanacademy.org/science/hs-bio/x230b3ff252126bb6:from-cells-to-organisms/x230b3ff252126bb6:homeostasis/e/apply-homeostasis-and-feedback-loops 2026-04-07T22:23:57.656416987Z Apply: homeostasis and feedback loops Apply your understanding of homeostasis and feedback loops in this set of free, standards-aligned practice questions. Megan Cohn exercise