Lecture 18Learning ObjectivesIdentify the micronutrients related to bone healthKnow timeline of bone growth and bone massIdentify functions and food sources of calciumIdentify functions and sources of vitamin D as well as risk factors and vulnerable groups for vitamin D deficienciesKnow outcome of inadequate vitamin D and calciumFunctions of BoneSupport – musclesProtection – organs (rib cage, skull)Storage reservoir for many mineralsProduction of blood cells (bone marrow)Calcium99% of body calcium is found in boneBlood calcium level tightly controlledAdequate intake values:1000mg to 1,200mg per day for adultsToo little: osteoporosisMajor source: milk, products, some fish, some legumesFunctions:Form and maintain bones and teethTransmission of nerve impulsesAssists in muscle contractionsBone healthPeak bone mass/density: Age 30Bone Density decreases after age 40Bone growth (0 – 14/17 years old)Determines bone sizeBegins in wombContinues until early adulthoodBone modeling (young adult)Determines bone shapeBegins in wombContinues until early childhoodBone remodeling (throughout life)Maintains integrity of boneReplaces old bone with new bone to maintain mineral balanceInvolves bone reabsorption and formationOccurs predominantly during adulthoodNutrition 130 1st EditionThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute. Lecture 18 Learning Objectives- Identify the micronutrients related to bone health- Know timeline of bone growth and bone mass- Identify functions and food sources of calcium- Identify functions and sources of vitamin D as well as risk factors and vulnerable groups for vitamin D deficiencies- Know outcome of inadequate vitamin D and calcium Functions of Bone- Support – muscles- Protection – organs (rib cage, skull)- Storage reservoir for many minerals- Production of blood cells (bone marrow) Calcium- 99% of body calcium is found in bone- Blood calcium level tightly controlled - Adequate intake values:o 1000mg to 1,200mg per day for adults- Too little: osteoporosis- Major source: milk, products, some fish, some legumes- Functions:o Form and maintain bones and teetho Transmission of nerve impulseso Assists in muscle contractions Bone health- Peak bone mass/density: Age 30- Bone Density decreases after age 40- Bone growth (0 – 14/17 years old)o Determines bone sizeo Begins in wombo Continues until early adulthood- Bone modeling (young adult)o Determines bone shapeo Begins in wombo Continues until early childhood- Bone remodeling (throughout life)o Maintains integrity of boneo Replaces old bone with new bone to maintain mineral balanceo Involves bone reabsorption and formationo Occurs predominantly during
View Full Document
Unlocking...