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Water
average adult is 50-60% water
Muscles is
75% water and fat tissue 20%
Water is important for
Maintaining equal distribution of all bodily fluids
Water is balanced amoung
Intracellular fluid, extracellular fluids, and intersitial fluids
Electrolytes
Minerals important for fluid balance
Electrolytes examples
Sodium, potassium, phosphate, magnesium, calcium, and chloride
Roles of water
Universal solvent, transport medium, maintains body temp, and lubricant and protective solution
Universal solvent
Liquid that acts as a medium for substances to dissolve
Transport medium
water in blood and lymph help transport substances through your body
Blood
helps transport oxygen, nutrients, and waste products
Lymph
Helps transport proteins to bloodstream, absorption of fats, and transports waste and microbes through lymph nodes
Lymph nodes
Cleaning stations
Water in blood
Absorbs, carries, and releases heat
During physical activity
Increased heat breaks water molecules on skin apart transforming them into a liquid (sweat) to a vapor to cool down
On a cold day
Less blood flows to your body surfaces so your core stays warm
Water as a lubricant
water combines with other molecules to act as a lubricant for your joints
Water in tears lubricates your eyes and helps flush out dust and debris
Part of saliva that moistens your mouth and the mucus that lubricates your intestinal tract
Main part of fluid that surround organs including your brain acting as a cushion
During pregnancy, developing fetus is surrounded by watery amniotic fluid
Water balance
amount of water consumed is equal to amount of water lost
Water is lost through
Kidneys: Urine
Large intestine: Stool (usually a small amount unless you have diarrhea)
Lungs: Water that evaporates as you exhale
Skin: When you release heat produced by your body’score
Dehydration can cause
Weight loss ,fever, dizziness, confusion, impaired physical coordination, and in extreme situations, death
Hyponatremia
State in which you drink so much water that your blood is diluted to a point that your sodium levels are too low
Insensible water loss
Water lost through skin and exhaling
Hyponatremia 1
swelling of body tissue (brain) and can cause confusion, disorientation, and death
When dehydrated
blood volume decreases and sodium concentration increases in blood, so Brain triggers thirst mechanism
Thirst mechanism
Secretion of antidiuretic hormone (ADH) to reduce urine output and Fluid inside cells moves into blood
Water needs men
16 cups/day (about 13 cups of beverages)
Water needs women
12 cups/day (about 9 cups of beverages)
Minerals
Inorganic elements essential to the nutrition of humans
Minerals are found in
Plant and animal foods. Best sources are vegetables, legumes, milk, and meats
Mineral functions
Plays a role in fluid balance, acts as enzymes, works with immune system, and part of your structural growth
Major minerals
Sodium, Potassium, Calcium, Phosphorus, Magnesium , Chloride , Sulfur
Sodium
Major electrolyte in blood and outside the cell, Helps regulate body water and blood pressure, Transports substances (i.e. amino acids) across cell membranes
Sodium daily needs
1,500 mg/day for adults under 51
Sources of sodium
Processed foods, table salt, meat,seafood, milk, cheese, and eggs
Overconsumption of sodium/Hypertension
UL: 3,600 milligrams/day
Potassium
Major electrolyte inside cells
Helps keep blood pH and acid-basebalance correct
Needed for muscle contraction and nerveimpulses
Can help lower high blood pressure
Helps increase bone density
Reduces kidney stones by helping to excrete citrate
Potassium daily needs women
2,600 mg/day
Major minerals/Macrominerals
Needed in amounts greater than 100 milligrams/day
Trace minerals/microminerals
Needed in amounts less than 15 milligrams/day
Daily needs potassium males
3,400 mg/day
Sources of potassium
Potatoes, melons, citrusfruits, most fruits and vegetables,meat, milk, and legumes
Overconsumption of potassium/Hyperkalemia
Can cause irregular heartbeats, damage to heart, and can be life-threatening
Underconsumption of potassium/hypokalemia
Can cause muscle weakness, cramps, irregular heartbeats, and paralysis
Can occur as result of excessive vomiting and/or diarrhea, anorexia and/or bulimia eating disorders
Calcium is the
Most abundant nutrient in the body
Calcium roles
Helps build strong bones and teeth
Plays a role in muscles, nerves, and blood
May help lower high blood pressure
May fight colon cancer
May reduce risk of kidney stones (supplements have opposite effect)
Daily needs calcium
1,000 to 1,200 mg/day
Sources calcium
Milk and dairy products, leafy greens, broccoli, salmon, sardines, and tofu
Hypercalcemia (UL: 2,500 mg/day)
Impaired kidney function, calcium deposits in blood
Underconsumption of calcium/Osteoporosis
decreased bone density that can result in fractures
Phosphorus is the
2nd most abundant mineral in the body
Phosphorus roles
Needed for bones and teeth
Important component of cell membranes
Needed for energy metabolism and stores
Helps maintain blood pH
Part of DNA and RNA
Daily needs phosphorus
700 mg/day
Phosphorus sources
Meat, fish, poultry, eggs, dairy, and cereals
Hyperphosphatemia (UL: 4,000mg/day)
Calcification of tissues
Underconsumption of phosphorus causes
Muscle weakness, bone pain, rickets, confusion, and death
Magnesium functions
Helps more than 300 enzymes,including those related to energymetabolism
Used in synthesis of protein
Helps muscles and nerves functionproperly
Maintains healthy bones andregular heartbeat
May help lower high blood pressure and reduce risk of type 2 diabetes
Magnesium daily needs male
400 mg/day
Magnesium daily needs females
310 mg/day
Magnesium sources
Meat, seafood, nuts, legumes, dairy, and whole grains
Overconsumption of magnesium
Large intakes from supplements can cause diarrhea, cramps, and nausea
Underconsumption of magnesium
Very rare, but can cause muscle weakness, seizures, fatigue, depression, and irregular heartbeats
Chloride function
Part of hydrochloric acid in the stomach Helps maintain fluid and acid-base balance
Chloride daily needs
300 mg/day
Sources chloride
Comes from sodium chloride, sosame sources that your find sodium
Overconsumption of chloride
UL: 3,600 mg/day
Sulfur functions
Is a part of vitamins and amino acids. Helps give some amino acids their three- dimensional shape allowing them to perform their roles
Sulfities
based substances that help preserve food
Trace minerals
Iron, Copper, Zinc, Selenium,Fluoride, Chromium, Iodine, Manganese, Molybdenum
Iron is the
Most abundant mineral on earth and main trace mineral in the body
Iron functions
Oxygen transport and storage and Aids brain function by helping enzymes that make neurotransmitters
Types of iron
Heme iron and Nonheme iron
Heme iron
Comes from animal sources and is more easily absorbed (part of hemoglobin and myoglobin)
Nonheme iron
come from plant foods and is not as easily absorbed
Iron daily needs
8 to 18 mg/day
Iron sources
Meat, fish, poultry, enriched and fortified breads and cereals
Overconsumption of iron can lead to
Vomiting, nausea, diarrhea, constipation, organ damage including the kidney and liver (UL: 45 mg/day)
Underconsumption of iron
Most common nutritional deficiency int he world. Causes fatigue, iron-deficiency anemia, growth retardation in infants
Copper functions
Important for iron absorption and transfer
Aids in synthesis of hemoglobin and redblood cells
Helps generate energy in cells,
Helps synthesize melanin
Links the proteins collagen and elastintogether in connective tissues
Helps enzymes protect cells from freeradicals
Role in blood clotting and maintaining healthy immune system
Copper daily needs
900 micrograms/day
Copper sources
Organ meats, nuts, seeds, cocoa, whole grains, legumes, and shellfish
Copper overconsumption
Vomiting, abdominal pain, nausea, diarrhea, liver damage (UL: 10,000micrograms/day)
Copper underconsumption
Impaired growth and development
ZInce roles
DNA synthesis, growth, anddevelopment
Healthy immune system and woundhealing
Taste acuity
May reduce risk of age-related macular degeneration
Zinc daily needs
8 to 11 mg/day
Overconsumption Zinc
Nausea, vomiting, cramps, diarrhea, and impaired immune function (UL: 40mg/day)
Can inhibit copper absoprtion
Underconsumption zinc
Skin rash, hair loss, diarrhea, and loss of taste and smell
Selenium roles
Help regulate thyroid hormones
Act as antioxidants
May help fight cancer
Daily needs selenium
55 micrograms/day
Sources selenium
Meat, seafood, fish, eggs, and whole grains
Overconsumption selenium/Selenosis
brittle hair and nails, skin rash, garlic breath odor, and fatigue (U L: 400 micrograms/day)
Underconsumption selenium/Keshawn Disease
causes heart damage
Fluoride roles
Makes teeth stronger
Daily needs flouride
3 to 4 mg/day
Sources fluoride
Fluoridated water and tea or other foods made with the fluoridated water
Fluorosis/Overconumption fluoride
Skeletal fluorosis – stiffness and pain in joints, osteoporosis, calcification of ligaments (UL: 10 mg/day)
Underconsumption fluoride
Increased susceptibility to dental carvities
Chromium roles
Improves insulin response
Daily needs chromium
20-35micrograms/day
Chromium sources
Pork, egg yolks, wholegrains, and nuts
Underconsumption of chromium may increase
insulin resistance
Iodine role
Needed by thyroid to make essential hormones