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Course: Middle school biology - NGSS > Unit 3
Lesson 2: Food and energy in organismsFood and energy in organisms
Review your understanding of food and energy in organisms in this free article aligned to NGSS standards.
Key points:
- All living things need food. Plants make their own food through photosynthesis. Animals get food by eating other living things.
- Some important food molecules are fats, proteins, and sugars. These all contain carbon atoms.
- In animals, large food molecules are broken down into smaller molecules during digestion. These smaller molecules eventually make it inside cells. Here, chemical reactions rearrange the molecules’ atoms, forming new molecules.
- Many of these new molecules can become part of an organism's cells and tissues. This helps the organism grow bigger and stay healthy.
- Other molecules from food are used for energy. This occurs through the process of cellular respiration.
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if a dog eats a cat is the dog a herbivore(10 votes)
Herbivores eats only plants.(30 votes)
So if i am what i eat, would i be 60% Pizza? or just bread, sauce,Cheese, and whatever topping i eat along with it?(10 votes)
Umm no.. that's not what they mean by "you are what you eat" they mean we have the same molecules as the food we eat not the same ingredients.(43 votes)
- Why is it that when you get older you usually get smaller?(16 votes)
Well, there is something between your bones. You could say it’s a cushion that keeps your bones from rubbing together. Over time this cushion maintains less water and decays. As your bones settle in together, you lose a few millimeters at a time. It is normal to shrink by about one inch as you age. Hope this helps!
-π(13 votes)
what do you get when you eat fish?(8 votes)
Usually you get the protein, sugar, and energy from the food. It depends on what you put on the fish. You digest it, and bring all of the good molecules to the cells.(7 votes)
- I do not think you should put sugar in bread; why it it classified as a 'sugar' ?(8 votes)
- You do put sugar in most breads, and it is a carbohydrate, which is a type of sugar.(7 votes)
what is the difference between cellular respiration and normal respiration(9 votes)
Cellular respiration generally describes how your cells make ATP, where ATP refers to a molecule used to provide the energy for performing chemical reactions. On the contrary, breathing or respiration refers to how your body gets oxygen into its lungs from the outside air.(4 votes)
- what if someone absorbs too many molecules or their stomach digest too much food?(8 votes)
- Probably a stomach ache or vomiting.(4 votes)
what do sugar proteins and fats do for our body(5 votes)- To put it simply, sugar and fats mainly give us energy. Proteins are also used for the same, but help the development and growth of muscles and hormones too.(8 votes)
how do they know what the things give off of ?(5 votes)- There are a few ways you can check this:
1) With a microscope XD
2) If you don't have a microscope, you can submerge a plant completely underwater. Soon, you will see bubbles. Those bubbles are oxygen bubbles.
Of course, it is best to do both of these, for it proves both of the outputs.(7 votes)
- how to breathe? I don't know how to(5 votes)
That is very concerning...(5 votes)
