Topic: Nutrition Aim: Explain nutrition & the 2 types of digestion Do Now: Protists Questions HW: Coloring Activities due Monday. ( Cut out five food labels of foods you eat regularly. Bring them in by Wednesday.)

Review: 1.Ameba ingest large pieces of food by the process of _______. 2.Once food is ingested by a paramecium, the food is surrounded by a _________. 3.A paramecia uses ________ for movement and capturing food. 4.The process which moves cytoplasm around the protist is known as _______. 5.Some protists remove excess water with the help of _______. 6.Paramecia expel wastes through the ____.

Nutrition When organisms take in & use materials needed for energy & all life processes

2 types of nutrition 1.Autotrophic Nutrition: produce food from substances taken from the environment

Examples of autotrophs: Plants, Algae (Photosynthesis)

2. Heterotrophic nutrition: Organisms must ingest food already made in the environment

3 processes involved in heterotrophic nutrition: –Ingestion: take IN food

–Digestion: breakdown of food –Egestion: removal of undigested food (solid waste)

Mechanical Digestion Large pieces of food are broken down into smaller pieces

Increases surface area of food to speed up chemical digestion

Example: Teeth

Chemical Digestion COMPLEX molecules (carbs, proteins, lipids) are broken down into smaller molecules

HOW? By using digestive enzymes

Carbohydrates  simple sugars (glucose)

Proteins  amino acids

Lipids  glycerol and fatty acids

Review: 1.During nutrition, explain what the substances taken from the environment are used for. 2.Explain the difference between autotrophic and heterotrophic nutrition. 3.Explain the difference between mechanical and chemical digestion. 4.Where does mechanical digestion occur in our bodies? Chemical digestion?

Identify the type of nutrition and digestion that is being described. 1.Food is broken down into smaller pieces. 2.Organisms make their own food. 3.Carbohydrates are broken down into simple sugars. 4.Increases surface area for chemical digestion. 5.Proteins are broken down into amino acids. 6.Teeth are used to break down food. 7.Enzymes are used.