Cell Energy and Transport Storyboard Project--Madelyn Scholle
טקסט Storyboard
- Wow, seems like you’re really struggling there, Clary. I can help tutor you after school if you’d be up for it!
- Hey Sonia! I just got out of biology class and my teacher was droning on about cellular respiration! I don't get it at all! And don’t even get me started on photosynthesis--it’s too wackadoo to comprehend!
- Cool! We can meet at my house after school, I’ve got a test on Monday and I know you can help me!
- Okay, we should probably start with cell transport. This is how energy and materials get inside of cells! There are 2 kinds: passive transport and active transport.
- Passive transport is when molecules move from an area of high concentration, that means there’s LOTS of other molecules that are like them, to areas of low concentration. This type of transport goes along with something scientists call the “concentration gradient.” Passive transport doesn’t require any energy. 3 examples of this are diffusion, which is when a solute moves from high to low concentrations, and osmosis, which is when water moves from a high concentration of other water molecules to an area of low concentration of water molecules. Facilitated diffusion is when particles use a protein to get in or out of the cell.
- I’m following…and now I get it!
- Now the second type of cell transport is called active transport. This kind of transport is when molecules move against the concentration gradient, from areas of low concentrations to areas of high concentrations. 3 kinds of this transport are endocytosis, exocytosis, and a pump.
- They are! Endocytosis is when really big particles, these can be solid or liquid, get into the cell using ATP energy. They are put into a vesicle and basically swallowed by the cell membrane! That’s how they enter the cell! Exocytosis is when materials leave the cell using ATP energy. They move into the cell’s external environment. Pump is a kind of active transport where particles use a protein to move against the concentration gradient.
- Cells can do so much! So passive transport is from high to low and doesn’t use ATP energy, and active transport is from low to high and uses ATP energy?
- Those sound cool!
- Yep! We should talk some about how cells get their energy. Plant cells make their own food called glucose through a process called photosynthesis.
- Glucose is a simple sugar. Plants convert glucose into an energy they can use through a different process called cellular respiration.
- Well, this happens in small organelles in plant cells called chloroplasts. Chloroplasts are green. They take carbon dioxide from the atmosphere, water, and light energy from the sun and create glucose and oxygen. The first 3 parts of this reaction are called the reactants. During photosynthesis, the reactants undergo a light dependent and light independent reaction to produce products. Plants then release oxygen back into the atmosphere.
- Wait, but there were 2 products. What happens to the glucose?
- How the heck….?
- Don’t worry, it’s simple once you get the hang of it!
- You’re really getting the hang of this! Cellular respiration takes place in a cell’s mitochondria. This is a special organelle that can be described as “the powerhouse of the cell.” There are 2 kinds of cellular respiration: aerobic, which needs oxygen, and anaerobic, which doesn’t use oxygen. Technically, aerobic respiration is more efficient and produces more ATP, but we’re mainly going to focus on anaerobic respiration. This can also be referred to as fermentation.
- During cellular respiration, plant cells convert chemical energy from glucose into energy the plant can use. This is called Adenosine triphosphate, but can be shortened to ATP energy! There are 3 stages of cellular respiration, glycolysis, the Krebs cycle, and an electron transport chain.
- That makes so much more sense! Where does all of this fancy stuff take place? Also, aren’t there different kinds of respiration?
- So. Many. Processes. My head hurts!
- There are also 2 types of fermentation. Neither type uses oxygen, and both convert glucose into a few ATP energy molecules. Alcoholic fermentation occurs in yeast. It turns glucose into ethanol, carbon dioxide, and 2 ATP molecules. The carbon dioxide released makes bread rise!
- Lactic acid fermentation occurs in your muscle cells. This kind of fermentation takes glucose and converts it into lactic acid and 2 ATP molecules. Sometimes, when muscles have no oxygen available, they will use this type of respiration. If the muscles are overworked, they may start to burn because lactic acid builds up inside cells.
- Yes! Photosynthesis yields the products of oxygen and glucose. Oxygen is released into the atmosphere for other organisms to use, while glucose is converted into carbon dioxide, water, and energy through cellular respiration. the plant will eventually need these products again, as reactants for photosynthesis again. Everything is connected! It’s just one big rotation over and over again. This cycle keeps plants healthy, and cellular respiration is used in all kinds of organisms!
- Wowsers. Okay, I just have one more question. How do photosynthesis and respiration connect? Is there a cycle or something…?
- I can’t believe it! You’ve taught me our entire biology unit in like, 2 hours! Thank you so much!
- Okay, okay
נוצרו מעל 30 מיליון לוחות סיפור
אין הורדות, אין כרטיס אשראי ואין צורך בכניסה כדי לנסות!
