Photosynthesis
carbon dioxide, water and sunlight
The products of combustion/respiration are... (Hint: What do fires produce?)
carbon dioxide, water and ATP (Heat is a form of ATP)
This is a type of feedback that continues to amplify the reaction, incresing it.
Positive feedback
A baby being born.
Positive
Plants take carbon dioxide to make sugar
photosynthesis
The products of photosynthesis are ...
glucose (a form of sugar), oxygen and ATP
The reactants of combustion/cellular respiration are... (Hint: What do you need to light a fire?)
sugar (a carbon source) and oxygen
This is an example of positive feedback...
Baby birth
Blood clotting
Global warming
Thermoregulation (regulation of internal temperatures) through shivering and sweating to maintain 98.6F.
Negative
Fires produce carbon dioxide, water and ATP
Where do plants get the carbon from to make sugar?
They obtain carbon from the atmosphere in the form of carbon dioxide.
The science word for energy
ATP
This is a type of feedback that increases and decreases to maintain homeostasis.
Negative feedback
Temperatures increase from more peat thawing and decaying as it realeases carbon dioxide into the atmosphere. Temperatures increase due to more carbon dioxide. Is this positive or negative? Why?
Positive because temperatures continue to rise
Animals break down sugar to make carbon dioxide, water and ATP
Respiration
Photosynthesis happens in this organelle inside the plant.
Chloroplast
Cellular respiration happens inside of this organelle inside the cell.
Mitochondria
This is an example of negative feedback.
Temperature regulation
Insulin regulation in diabetes
You get a cut. The brain detects the cut in the skin and sends chemical messengers to signal platelets to the site of the cut. More platelets arrive to stop the bleeding and then more chemicals are sent. The feedback shuts off once bleeding stops. Is this positive or negative feedback? Why?
Positive because more and more platelets are sent and then the bleeding stops.
Taking carbon dioxide from the atmosphere to make sugar, and oxygen.
Photosynthesis
Why did the spinach leaves float to the top during photosynthesis?
They took the baking soda and water and light to make glucose and oxygen. They oxygen helped them to float to the top.
What is the chemical equation for cellular respiration? (Hint: What do fires need to burn and what do they produce?)
Forest fires
carbon source + oxygen = carbon dioxide + water + ATP (energy)
Cellular respiration
glucose + oxygen = carbon dioxide + water + ATP (energy)
Is the following positive or negative feedback?
The brain senses the female is going to ovulate and sends a chemical messenger to the ovaries to produce estrogen. The estrogen causes the brain to produce less chemical messengers, helping the female to stop ovulating and menstrating.
Negative feedback, ovulation stops when less chemicals are produced.
How are positive and negative feedback different from one another?
Positive feedback goes up and up and up. Negative feedback goes up and then down, up then down.
Plants take sugar and make carbon dioxide and water and ATP
Cellular respiration