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Bio 137

Chapters 6-10

Sources: Food, Drink and Biosynthesis Body Content: 60% of body weight Lose Thru: Urine, Sweat, Breath or Feces Water Homeostasis
Water 60% Fat 17% Protein 15% Minerals 5% Chemical Composition of the Body
National Academy of Sciences: 1mL of water per Kcal burned How Much Water do we Need?
Raw tomatoes 94% Raw Carrots 88% Whole Milk 87% Apple 84% Foods are mostly Water (By Weight)
Baked Potato 75% Cook Beans 69% Fried Steak 55% Peanut Butter 2% Foods are mostly Water (By Weight) cont
Thirsty- Reflex may be block by illness, exercise or old Sweating- (or will be) Heavy sweating loss of 2 liters of water (4-5 pounds per hour) Produce < 2 cups of urine per day Drink More Water if you are
Water Carbs, Sugar (Exercise beyond one hour) Electrolytes, Salts (Exercise beyond 2 hours) Prehydration to counteract Dehydration (Order of Importance for a athlete)
Caffeine can enhance performance in short duration events Diuretics (substance, promotes production of urine) Lessen the amount of diuretics you consume and retain Caffeine and Alcohol
> 20liters a day Hyponatremia (to little soda in the blood) Mental Dulling Can I intake to much Water (Water intoxication)
Confusion Coma Convulsions Death Water Intoxication
40% Intracellular Fluid 20% Extracellular Fluid 60% of Body Weight (Water) Breakdown
Regulates what can move in and out of a cell Plasma Membrane
Na+ C1- Glucose Ca++ Composition of Extracellular Fluid
K+ Protein- Phosphate mg++ Sulfate Composition of Intracellular Fluid
Gated channels that determine when solutes Na+ - C1- passes thru a cell Membrane Channels
When concentration is unequal cell membrane will diffuse to equal out the concentration Osmosis
Osmorecptor Anti-diuretic Hormone (ADH) Activate Thirst Receptors Regulation of ECF Osmolarity
ECF 9 g per liter Fresh Water 0.06 g per liter Sea Water 30 g per liter Salt NaC1 Concentration
Standard Saline Solution 0.9% 5% Glucose Ringers Solution (Na, K, Ca, C1 Solutions Isotonic (solutions that will not disrupt) to ECF
OH- (Hydroxide Ion) and H+ (Hydrogen Ion) Ionization of Water
0 Acidic 7 Basic 14 (Sour) (Bitter) pH Scale
Lower the pH of a Solution Acids (HC1, H2CO3, H2SO4, CO2)
Raises the pH of a solution Bases (NaOH, NH3, KOH)
7.4 Slightly Alkaline Human pH Level
2 on pH Scale Gastric Juice HCI (Fluid in stomach)
6/7- Death 7/7.35- Acidosis 7.35/7.45- Normal pH 7.45/7.8- Alkalosis 7.8/9- Death Why is pH Important (Blood pH Levels)
Source of change and regulation of pH Respiratory Acidosis/Alkalosis (CO2 + H20 <> H2CO3 <> HCO3- + H+ Lungs10% Muscle70%
Holding your breath What can Cause pH to Drop
Acid formation during exercise Vomiting (Loss of Gastric Juice) Starvation/Low Carb Diet Untreated Diabetes Mellitus Metabolic Acidosis/Alkalosis
Created by: myrnasGirl3