parr- minerals

What are the seven essential macro-minerals in animal nutrition?

Calcium, Phosphorus, Magnesium, Sulfur, Sodium, Potassium, and Chloride.

What are the nine essential micro-minerals (trace minerals) in animal nutrition?

Manganese, Zinc, Iron, Copper, Selenium, Iodine, Cobalt, Molybdenum, and Chromium.

What is the primary quantitative difference between macro-minerals and micro-minerals in small animal diets?

Macro-minerals are required in larger amounts (typically grams/day), whereas micro-minerals are required in minute amounts (typically milligrams or micrograms/day).

What defines a nutrient deficiency versus a nutrient toxicity?

Deficiency occurs when nutrient intake falls below the minimum requirement resulting in clinical signs; toxicity occurs when intake exceeds the maximum tolerable level or safe upper limit.

What is the recommended Calcium to Phosphorus (Ca:P) ratio range in dog and cat diets according to AAFCO?

Minimum Ca:P ratio of 1.0:1.0 and a maximum Ca:P ratio of 2.0:1.0.

Which specific minerals and vitamins have maximum recommended levels established by AAFCO for dogs?

Calcium, Phosphorus, Iodine, Selenium, Vitamin A, and Vitamin D (with a lower Calcium maximum for large-breed puppies).

Which specific minerals and vitamins have maximum recommended levels established by AAFCO for cats?

Phosphorus, Iodine, Vitamin A, and Vitamin D.

What percentages of body Calcium and Phosphorus are stored in bones and teeth as hydroxyapatite?

Approximately 99% of total body Calcium and 80% of total body Phosphorus.

What are the physiological roles of the 1% ionized Calcium present in blood and extracellular fluid?

Blood clotting, muscle contraction, nerve signal transmission, and cell membrane permeability.

What are the major physiological functions of Phosphorus outside of bone structure?

Energy metabolism (component of ATP), genetic material (component of DNA and RNA), and cell membrane structure (phospholipids).

Which hormones regulate Calcium and Phosphorus homeostasis in the body?

Parathyroid Hormone (PTH, increases blood Ca), Calcitonin (lowers blood Ca), and active Vitamin D (increases GI absorption of Ca and P).

What structural and metabolic functions are performed by Magnesium?

Forms bone matrix with Ca and P, acts as an enzyme cofactor (e.g., alkaline phosphatase), supports ATP energy production, and aids muscle and nerve function.

Where is Sulfur structurally incorporated in the animal body?

Skin, hair, wool, feathers, cartilage (chondroitin sulfate), connective tissues, sulfur amino acids (methionine, cysteine, taurine), and vitamins (thiamin, biotin).

What are the body distribution reserves for macro-minerals versus electrolytes?

Macro-minerals (Ca, P, Mg, S) have large structural reserves in bones; electrolytes (Na, K, Cl) have no structural reserves and must be supplied daily in the diet.

Which electrolytes serve as the major cations and anions in extracellular versus intracellular fluids?

Extracellular fluid: Major cation is Sodium (Na+) and major anion is Chloride (Cl-); Intracellular fluid: Major cation is Potassium (K+).

What is the function of the Na+/K+ ATPase pump in cell membranes?

Pumps 3 Sodium ions (Na+) out of the cell and 2 Potassium ions (K+) into the cell to maintain membrane potential, nerve transmission, and osmotic balance.

What are the major functions and storage sites of Manganese (Mn)?

Functions in Mn-superoxide dismutase, bone/cartilage matrix development, and lipid/cholesterol synthesis; stored in bone and liver.

What factors inhibit intestinal Zinc (Zn) absorption?

Dietary phytates (found in grains, cereals, legumes, and nuts) and high dietary Calcium levels (which form insoluble Ca-Zn-phytate complexes).

What is the primary homeostatic mechanism for regulating Iron (Fe) levels in the body?

Regulating intestinal Iron absorption (because the body has very limited capacity to excrete excess iron).

What type of anemia is caused by dietary Iron (Fe) deficiency?

Microcytic, hypochromic anemia (smaller RBCs with reduced hemoglobin).

What essential copper-containing protein is required for Iron utilization and hematopoiesis?

Ceruloplasmin (ferroxidase activity).

What type of anemia can result from Copper (Cu) deficiency?

Anemia that may be microcytic, normocytic, or macrocytic.

How do Selenium (Se) and Vitamin E interact in cellular antioxidant defense?

Selenium (as part of glutathione peroxidase) and Vitamin E work synergistically to protect cells from oxidative damage, effectively sparing each other.

What are goitrogens and how do they interfere with Iodine (I) function?

Naturally occurring compounds (found in Brassica plants like kale, cabbage, and turnips) that interfere with thyroid hormone iodination, leading to goiter.

Why is Cobalt (Co) an essential trace mineral in ruminant nutrition?

Cobalt is a necessary constituent of Vitamin B12; deficient Cobalt leads to impaired ruminal B12 synthesis, impaired propionate metabolism, and hypoglycemia.

How does excess Molybdenum (Mo) induce secondary Copper deficiency?

Excess Molybdenum binds Copper in the blood to form an insoluble complex and inhibits intestinal Copper absorption.

What is the definition of an anti-nutritional factor in food?

Naturally occurring substances in food that interfere with the digestion, absorption, or metabolic utilization of essential nutrients.

Which anti-nutritional factors specifically impair Iron, Biotin, and Thiamine absorption or function?

Tannins decrease Iron absorption; Avidin (in raw egg whites) binds Biotin; Thiaminases (in raw fish/certain plants) destroy Thiamine (Vitamin B1)