Cellular Cellular Respiration Respiration Unit 3Unit 3

Cell Growth ReviewCell Growth Review1.Cells grow and divide by 1.Cells grow and divide by

mitosis and meiosis (more mitosis and meiosis (more cells made).cells made).

In order to grow and do In order to grow and do work, cells need energy. work, cells need energy.

2. Cell energy comes from 2. Cell energy comes from food. food.

Cell GrowthCell Growth

3. Cells grow just like organisms do. 3. Cells grow just like organisms do.

They do the following:They do the following:

A. Take in nutrientsA. Take in nutrientsB. Release energy from foodB. Release energy from foodC. Get rid of wasteC. Get rid of waste

What is Food?! What is Food?! Where do you think all of the energy to Where do you think all of the energy to

create food comes from? create food comes from?

How do you think our bodies turn food How do you think our bodies turn food into energy? into energy?

What is Food?! What is Food?! You probably know “food” to be any of You probably know “food” to be any of

the nutrients that are required for plants the nutrients that are required for plants and animals to grow and survive.and animals to grow and survive.

In scientific terms, the definition of food is In scientific terms, the definition of food is a bit different. a bit different.

What is Food?! What is Food?!

1. In scientific terms, food is only the 1. In scientific terms, food is only the substances, such as substances, such as carbohydrates, carbohydrates, proteins and lipids (fats)proteins and lipids (fats) that organisms that organisms get the energy they need to grow.get the energy they need to grow.

2. Food gives molecules the fuel they need 2. Food gives molecules the fuel they need to build new material for all organisms. to build new material for all organisms.

How Plants Use FoodHow Plants Use Food1. Plants use the energy from the sunlight to 1. Plants use the energy from the sunlight to

make sugars (glucose) out of carbon dioxide make sugars (glucose) out of carbon dioxide and water (photosynthesis-transfers light and water (photosynthesis-transfers light energy into chemical energy). energy into chemical energy).

2. The food can be used immediately or can be 2. The food can be used immediately or can be stored for later use. stored for later use.

Minerals and other nutrients in the soil are not Minerals and other nutrients in the soil are not food (don’t give energy), but are needed for food (don’t give energy), but are needed for plants to make complex molecules. plants to make complex molecules.

Cellular RespirationCellular Respiration

1. Matter is transferred FROM organisms to 1. Matter is transferred FROM organisms to the physical environment (plants, air etc) the physical environment (plants, air etc) when molecules from food react with when molecules from food react with oxygen to produce carbon dioxide and oxygen to produce carbon dioxide and water. water.

Basically, cellular respiration is the Basically, cellular respiration is the opposite of photosynthesis. opposite of photosynthesis.

Are these equations balanced?!

What similarities and differences do you observe?

Cellular RespirationCellular Respiration

2. It is through the process of cellular 2. It is through the process of cellular respiration that cells convert glucose to a respiration that cells convert glucose to a usable form of energy (ATP-Adenosine usable form of energy (ATP-Adenosine Tri-Phosphate).Tri-Phosphate).

3. The energy stored in ATP is how cells 3. The energy stored in ATP is how cells are able to grow, develop and moveare able to grow, develop and move