Photosynthesis & Respiration Cells & Heredity Chapters 2.1 and 2.2 Pages 50-59 Begin class by sitting calmly for a few moments. Ask students what they’re doing – breathing. Why?

Photosynthesis The process by which plants make food Photo Synthesis Light Synthesis Putting together

Capturing Light Sunlight is used to carry out reactions Chloroplast in leaves captures the light Another plant-only organelle Green color is the pigment of chlorophyll.

Making the Food Plant gathers water (H2O) from roots Takes in carbon dioxide (CO2) via stomata Small openings on the underside of leaf H2O and CO2 undergo reactions driven by light energy to create sugars.

Eating Sunlight

Respiration Starts in the Cytoplasm where glucose is broken down Then, in the Mitochondria, oxygen is added and energy is released.

Fermentation Releasing energy from sugars without using oxygen Used by organisms where there is little / no O2 Alcoholic: releases alcohol and CO2 (yeast)

How are Respiration and Energy connected? After you eat food, your body breaks it down and stores it as carbs / starches Just as a plant

Fermentation Lactic-Acid Created when cells are using oxygen faster than it can be replaced Instead of respiration, Fermentation occurs Byproduct of lactic acid causes soreness.

Due: Friday, September 28th What to Work On Read pages 50-59 Section 2.1 Review page 54 Questions 1 and 3 Section 2.2 Review page 59 Questions 1, 2 & 4 Due: Friday, September 28th