In humans, one feedback mechanism is to either sweat or shiver, depending on the body temperature. Sweating helps lower the body's temperature, and shivering helps raise the body's temperature.
Answer:
Devices used to convert thermal energy to mechanical energy are called heat engines.
The answer is heat engines.
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<span>A. to produce ATP and NADPH for the light-independent reactions
Remember, the purpose of photosynthesis is to provide energy for the plant to perform other chemical reactions during the process of growing. So now, let's take a look at the possible answers and see why they do or do not make sense.
A. to produce ATP and NADPH for the light-independent reactions
* Both of these are nice high energy compounds produced directly by photosynthesis. Unless we see a better option later, this looks like a good choice.
B. to convert carbon dioxide into water
* Does this provide energy to the plant? No it does not. So this is a bad choice.
C. to release oxygen into the atmosphere
* This is a happy side effect of the process for us mammals, but it's not the main purpose of photosynthesis and in fact doesn't provide energy to the plant. So wrong choice.
D. to break down glucose into pyruvic acid
* This does produce energy. But doesn't require light. So it has nothing to do with photosynthesis. Wrong choice.</span>
DNA is not in all our food because DNA is used in organisms. For example an organge has DNA because it comes from a tree which is alive a Has organisms so it can stay alive. Meanwhile a chocolate doesn’t have DNA because it’s a man made food
There are 3 kinds of contraction in skeletal muscle:
Concentric contraction: The muscle in this contraction will gives force more than the load gives. This will make the muscle shorten as it pulling the load.
Eccentric contraction: In this contraction, the force given by muscle is not enough to pull the load. This causes the load pulling the muscle instead. So the muscle will be lengthened as the load moving away.
Isometric contraction: In this contraction, the length of the muscle will be kept same by adjusting the force given to be equal to the force needed.
