Nutrition+class+notes+BH

Why do we need to eat? energy and matter.. you must consume matter in order to keep matter. we break down matter--> loosing cells, part of decay (eating helps you have building blocks to build more cells)

--> calories(how much energy is in a food) sometimes we consume to may calories.

--> fat (insulation, cell membrane) every cell has a fat barrier on it. not all fats are good (sat. fats--> come from animals and are solid at room temperature) (trans. fat--> (preserves food) man made fat that is particularly bad for you.

unsaturated fat is good. foods like olive oil, sunflower oil, vegetable oil, ect.

True or False?

to much dietary fat causes heart disease lack of dietary fiber causes colon cancer Fiber(bran, salad, greens) Sodium- provides salt in your diet, but you don't want to much of it. (associated with hgih blood pressure Carbohydrates--> good carb. vs. bad carb, (good--> fiber (plants, whole wheat multi grain breads) Protein--> proteins are what helps us get stuff done. --> protein is really important. (amino acids--> building blocks to make our own protein)

essential amino acids--> eating other animals (cooking their muscles and eating them ) muscles are a big source of proteins

vegetarians eat dairy, nuts, ect.

Low carb. diet--> eting no refined sugar.

vitamin A--> molecule involved in vision vitamin C--> may help ammune system (making a protein called collagen) colagen is about 25% of human protein it's a filler, its in your lips, nose, it's in connective tissue it's basically a filler protein.

usually at the bottom of a label they will say these are based on a 2000 cal. day diet.

digestive system--> its a tunnel that runs through your body, it's lined with cells that extract cells then th rest exits the body. mechanical digestion--> breaking food up into smaller pieces (your mouth) your food goes down the tube and enters the stomache. the acid in the stomach churns the food and makes a sloshy concoxion. (protein can be digested in your stomache)

you can't digest fiber so the bacteria eats it within our bodies, water is absorbed. when it reaches your large intestine. Diahrrea is when your body doesn't absorb the water.

it spends about 27 hrs. in the large intestine.