CELLULAR RESPIRATION Unit 6: Life Science ,

POINTS TO CONSIDER How do we gain the energy we need from the food we eat? Which do you think provides more energy – a bowl of pasta or a small piece of candy? What “waste” gas do you exhale?

Cellular Respiration Lesson Objectives: The student will: 1. Write and explain the formula for cellular respiration 2. Explain the states of cellular respiration

WHAT IS CELLULAR RESPIRATION? How does the food you eat provide the energy you need? When you need a quick boost of energy, you might reach for an apple or candy bar. But the cells do not eat candy bars or apples, These foods have to be broken down in order to produce the energy needed for that boost. Through the process of cellular respiration, the energy in the food is changed with the energy that the cells need to perform their functions. https://www.youtube.com/watch?v =nyNNNSTKjnw

WHAT IS CELLULAR RESPIRATION? https://www.youtube.com/watch ?v=4Eo7JtRA7lg In cellular respiration, glucose and oxygen are converted into ATP, carbon dioxide, and water. ATP is a nucleic acid and the energy that cells can use. ATP is the chemical energy that cells use to perform work such as moving your muscles as you walk down the street.

THE PROCESS OF CELLULAR RESPIRATION Glucose is broken down in the cytoplasm of the cells and then transported to the mitochondria, the energy powerhouses of the cells. Inside the mitochondria, the broken down glucose is further broken down to release ATP. Oxygen is needed in order to break down glucose and produce ATP. The initial step releases 2 molecules of ATP for each glucose. The later steps release much more ATP.

THE REACTANTS Oxygen and glucose are both reactants in the process of cellular respiration. Oxygen enters the body when the organism breathes in. Glucose enters the body when the organism eats food. We are what we eat. The food will provide the energy needed for cellular functions.

THE PRODUCTS & CHEMICAL REACTION The main product of cellular respiration is ATP. Waste products include carbon dioxide and water. Carbon dioxide is transported from the mitochondria out of your cell, and back to your lungs to be exhaled. When one molecule of glucose is broken down, it can be converted to a net total of 36 or 38 molecules of ATP. This only occurs in the presence of oxygen.

CONNECTING CELLULAR REPIRATION AND PHOTOSYNTHESIS https://www.youtube.com/watch?v =gBz8DvyenlM&t=3s Notice that the equation for cellular respiration in in direct opposite of photosynthesis. While water was broken down to produce oxygen during photosynthesis, in cellular respiration oxygen is combined with hydrogen to produce water. While photosynthesis requires carbon dioxide and releases oxygen, cellular respiration requires oxygen and releases carbon dioxide. This exchange for carbon dioxide and oxygen is what helps to keep the atmospheric levels stable.