MINERAIS (sais minerais) - Aula para ensino superior

In this essential video, we explore the inorganic substances that your body cannot produce but are vital and must be ingested through food. Classified as micronutrients, we will uncover why tiny amounts of these elements have a gigantic impact on your health. What you will learn in this lesson: 1. Classification of Essential Minerals Definition: Minerals are essential inorganic substances, classified as Macrominerals and Microminerals or trace minerals. Electrolytes: Understand what they are (Ca²⁺, K⁺, Na⁺, Cl⁻, Mg²⁺) and their fundamental role in osmotic pressure and water balance in the body, especially after exercise. 2. Detailed Macrominerals: Functions and Implications for Health Calcium (Ca): The most abundant mineral, with 98% stored in bones. It is crucial for blood clotting, a component of hydroxyapatite (bone and teeth rigidity), and acts as a second messenger and signaling molecule for muscle contraction. Its deficiency can lead to osteoporosis and rickets. Phosphorus (P): Essential for the intracellular buffer, it makes up fundamental molecules such as ATP, nucleic acids, membrane lipids, and is central to metabolic regulation (enzymatic control via phosphate). Magnesium (Mg): Cofactor of more than 300 enzymatic reactions, vital for energy metabolism (such as in glycolysis) and essential for the synthesis of DNA and RNA. Sodium (Na) and Chloride (Cl): The main electrolytes of the extracellular environment. Sodium is crucial for the transport of nutrients and nerve impulses, while Chloride participates in the formation of hydrochloric acid in the stomach. Excess sodium is linked to hypernatremia and increased blood pressure. Potassium (K): The main intracellular ion, responsible for maintaining membrane potential. It is vital for the electrical activity of neurons and muscle fibers (including cardiac muscle) and helps regulate blood pressure. Sulfur (S): Primarily integrated into amino acids (cysteine ​​and methionine). It is crucial for the three-dimensional stability of proteins (disulfide bridges, e.g., insulin) and is a component of the antioxidant glutathione. 3. Essential Microminerals: From O₂ to DNA Iron (Fe): Approximately 70% is in hemoglobin, being the atom that effectively transports oxygen and electrons (in cytochromes). Understand the absorption mechanism regulated by hepcidin and the risks of deficiency (microcytic anemia) and excess (hemochromatosis). Zinc (Zn): Cofactor in more than one hundred enzymes and essential for the formation of "zinc fingers," protein domains that regulate gene expression by binding to DNA. Iodine (I): Essential for the synthesis of thyroid hormones T3 and T4, which regulate basal metabolism. Its deficiency can cause goiter (enlargement of the thyroid gland) and hypothyroidism. Copper (Cu): Essential for the synthesis of neurotransmitters (norepinephrine) and crucial for the mobilization of iron in the blood through ceruloplasmin. Its deficiency can lead to anemia. Selenium (Se): Used to form selenoproteins (e.g., glutathione peroxidase), key enzymes in antioxidant defense and thyroid health. Manganese (Mn) and Molybdenum (Mo): Manganese is a cofactor for enzymes in the urea cycle and mitochondrial antioxidant defense. Molybdenum is necessary for the enzyme sulfite oxidase (preventing the accumulation of toxic sulfites) and xanthine oxidase (uric acid production). Watch until the end for a brief mention of other important minerals such as Fluorine (dental protection) and the list of minerals considered toxic (Aluminum, Lead, Mercury, Cadmium). 👍 Leave your Like to support the channel! 💬 Write a Comment to interact with us! 🔔 Subscribe to the channel and activate notifications to strengthen the channel and not miss any biochemistry lessons! Happy studying! #BiochemistryOfEssentialMinerals, #EssentialMinerals, #Macrominerals, #Microminerals, #FunctionOfMinerals, #Electrolytes, #Calcium, #Phosphorus, #Magnesium, #Sodium, #Potassium, #Iron, #Zinc, #Iodine, #Copper, #Selenium, #Nutrition, #Health, #Metabolism, #BiochemistryLesson, #Micronutrients, #MineralDeficiency, #Supplementation Chapters 00:19 - Classification of Essential Minerals 04:11 - Calcium 09:25 - Phosphorus 12:16 - Magnesium 14:42 - Sodium and Chloride 18:54 - Potassium 21:24 - Sulfur 26:40 - Iron 35:31 - Zinc 38:06 - Iodine 41:10 - Copper 47:25 - Selenium 50:35 - Manganese 53:16 - Molybdenum 56:03 - Other minerals