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metabolism Metabolism is the set of chemical reactions that occur in living organisms in order to maintain life. These processes allow organisms to grow and reproduce, maintain their structures, and respond to their environments. Metabolism is usually divided into two categories. Catabolism breaks down large molecules, for example to harvest energy in cellular respiration. Anabolism, on the other hand, uses energy to construct components of cells such as proteins and nucleic acids. The chemical reactions of metabolism are organized into metabolic pathways, in which one chemical is transformed into another by a sequence of enzymes. Enzymes are crucial to metabolism because they allow organisms to drive desirable but thermodynamically unfavorable reactions by coupling them to favorable ones. Enzymes also allow the regulation of metabolic pathways in response to changes in the cell's environment or signals from other cells. The metabolism of an organism determines which substances it will find nutritious and which it will find poisonous. For example, some prokaryotes use hydrogen sulfide as a nutrient, yet this gas is poisonous to animals. The speed of metabolism, the metabolic rate, also influences how much food an organism will require. A striking feature of metabolism is the similarity of the basic metabolic pathways between even vastly different species. For example, the set of carboxylic acids that are best known as the intermediates in the citric acid cycle are present in all organisms, being found in species as diverse as the unicellular bacteria Escherichia coli and huge multicellular organisms like elephants.These striking similarities in metabolism are most likely the result of the high efficiency of these pathways, and of their early appearance in evolutionary history. Uploaded by tirtha9 (409) • 3 months ago Tags: metabolism, catabolism, health, workout tirtha9 (409)

Overeating can throw off your metabolism?

I guess it makes sense. What do you think? Do any of you have experience with this?New research shows that overeating triggers a metabolic response normally dormant in the hypothalamus region of...

Energy pills. Did they ever work for you?

I am one of those poor souls that has fallen victim to energy supplements. I used to work in a convenient store where I would take "stackers":5 hour energy" and so on. I also drank 10 red bulls in...

Exercise.... It could slow down the metabolism?

I hear people say it's not good to exercise because once you stop, your metabolism becomes slower than your normal. Is there any truth to this belief? I understand it would slow down but I don't...

how do i know if my metabolism is slow??

hmmmm..i'm just wondrin' if how would i know if i have a slow metabolism???does having a slow metabolism bad for the health???

how do you feel that you can loose weight?

I have a past experience when I reduced my diet, that helped me to loose weight drastically. I also continuously taking only foods which contain neither salt nor oil.. It was awful for first few...

Breakfast Important for Fat Burning!

I get very frustrated with my clients when they tell me they don’t eat breakfast. If you think about it, your body has been in a fast for anywhere from 8-10 hours! That is a long time for your...

How to increase Metabolism?

This is Part 2 of Body Metabolism How to increase Metabolism: 1) Build up on lean, mean body mass. How? => Match the amount of eating to the amount of activity one has. Here are some...

Why Is 1 Pound Of Muscle So Very Important?

Duration 2:42Resources:Start Strong MondaysStart Strong ArchivesRed Hot MetabolismMy Interview With ShawnThe answer:Strength Training builds lean muscle, the most metabolically active tissue in your...

You skinny chicks need to go eat a sandwich

Ok, I have been holding this in for a while, and I would like to vent, so please excuse my angry attutude. I was recently reading Seventeen magazine, ( Such a weird thing to do for a semi-punk girl...

Follow The 3 by 3 Meal Frequency Rule

Duration 3:45Resources:Start Strong MondaysStart Strong ArchivesRed Hot MetabolismMy Interview With ShawnTom BilellaNutrition Treatment CenterWhat Is the 3 by 3 and 5 by 9 rule?Dr Tom Bilella, D.C.,...