Photosynthesis and Respiration

Photosynthesis and Respiration

2 Sides of the Same Coin

2 Sides of the Same Coin

• Both Processes require a source of energy

• What is the source of energy for photosynthesis?

• What is the source of energy for Respiration?

Open Ended

Let's say you are starving, is there anything you can do to gain energy without eating, drinking, or using stored energy? What organism if any can?

• In addition to plants, some protists such as algae and bacteria can undergo photosynthesis

Open Ended

So what is Photosynthesis?

Photosynthesis

• Photosynthesis is the process plants use to make their own “food” from the sun's energy, carbon dioxide, and water.

• During photosynthesis, carbon dioxide and water combine with solar energy to create glucose, a carbohydrate (C6H12O6), and oxygen.

• in the presence of sunlight, carbon dioxide + water → glucose + oxygen.

Food for Thought

• Can any organisms eat food that didn't at some point get its energy from an autotroph/ photosynthetic organism?

• It's not always sunny, what do plants do then?

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Let's Break it Down Now

Multiple Select

What reactants do plants need to complete the photosynthesis reaction?

• Carbon Dioxide

• Oxygen

• Water

• Soil

Multiple Choice

Plants can't start the photosynthesis reaction without what energy source?

• Glucose

• ATP

• Light Energy

• Oxygen

Multiple Choice

Photosynthesis occurs in the?

• Stomata

• Chloroplast

• Root

• Chlorophyll

Multiple Select

The products of photosynthesis include?

• Glucose

• Water

• Carbon Dioxide

• Oxygen

Respiration is Photosynthesis Backwards?

• How plants produce energy without the light

• How Heterotrophs obtain energy

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Cellular Respiration

• Through the process of cellular respiration, the energy in food is changed into energy that can be used by the body's cells.

•  The sugars in the food you eat are digested into the simple sugar glucose, a monosaccharide.

• During cellular respiration, glucose and oxygen are converted into carbon dioxide and water, and the energy is transferred to ATP.

• glucose + oxygen → carbon dioxide + water

What is ATP

• During cellular respiration, the energy stored in glucose is transferred to ATP

• ATP, or adenosine triphosphate, is chemical energy the cell can use. It is the molecule that provides energy for your cells to perform work.

• Examples of work?

• Both Plants and Animals use ATP to do Work

Where do these processes happen?

• Photosynthesis occurs in the Chloroplasts of plants

• Cellular Resperiation occurs in Mitochondria in both humans and plants

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Summary

• 1. Plants use sunlight to convert water and carbon dioxide into glucose and oxygen.

• 2. Plants can store glucose and use it with oxygen to perform cellular respiration to produce water, carbon dioxide, and generate ATP which is used to create energy for actual work.

• 3. Animals obtain glucose from plants, oxygen from the air, then perform cellular respiration to generate ATP to make energy for actual work. The by products (carbon dioxide and water) are released by the body.

Can You Model It?

Think about how you would

Open Ended

Lets say you eat meat, where does the energy that meat contains come from?

Multiple Choice

Organisms can perform all of its functions (functions such as growth) because of the energy stored directly in

• Glucose

• ATP

• Chlorophyll

• Oxygen