Metabolism Definition and 28 Threads

This question might sound silly, but I think I am really missing some points about the energy requirements of metabolism. Please help me to understand better. It is said that all catabolic (break down) reactions are inherently exergonic, ie., they release energy. Similarly, all anabolic...

Hi everyone Could someone explain what happens in the body when metabolism speeds up? For example, does it produce more stomach acid? Or does it produce more concentrated stomach acid? Thanks

Are you like me and think biology can be messy and difficult? Well, you're right. :nb) Here is a very cool, very large interactive map of metabolic pathways, which a friend of mine sent to me today: http://metabolic-pathway.com/fullMap.html And if you want to be extremely careful with your...

Can anyone explain why an artificial magnetic field may or may not promote an increase in cellular metabolism?

I have a few questions on energy from foods. Do we have any other macronutrients that contribute energy to the body other than carbohydrates, proteins and fats in our body? What is the role of Hydrochloric acid (HCL) in our stomach? Is the HCL involved in all three above macronutrient digestion?

I am trying to understand about glucose metabolism! I have been researching this stuff forever! X( Would you see if my explanations are right, and if not, tell my why? Thank you SO much! That would be a HUGE help! Is it true that uptake and release of gas/nutrients only occur in the...

Carbon monoxide can make carboxyhemoglobin in the human body. Do plants have a similar composition? Would smoke from fires and exhaust from fossil fuel engines have an effect on a plants ability to absorb the CO2 or O2 it needs?

Hello, I'm asked to write about the following: "High fructose corn syrup and margarine are two commonly used food ingredients that contribute to both inflammation and obesity." Write one page each on the metabolism of each of these foods in your body, and cite at least one recent paper...

Hello, I'm an atheist: a mentally disabled one with depression and no future. So perhaps this may bias my point of view: When we atheists die, we will have no memories and conscious awareness of our success and failures in life because our consciousness and memories are lost for eternity...

Homework Statement A model for the basal metabolism rate, in kcal/h, of a young man is given by the formula below, where t is the time in hours measured from 5:00 AM. What is the total basal metabolism of this man over a 24 hour period? R(t) = 85 - 0.18cos (Pi*t/12) ∫(0to24) R(t)dt= ...

Integrin-PI3K-Akt signal transduction is well known. Akt signaling has been heavily reviewed and is well known to play a role in metabolism. So why do I have difficulty finding any research that has linked cell adhesion to metabolism? It would make sense. If a cell became cancerous, one way...

What does that mean. Transfer of 1-carbon unit. What is a 1-carbon unit, are they referring to carbon number 1(according to nomenclature) of the molecule being transferred or a single carbon atom from the molecule is transferred? Can anyone explain. Thanks :smile:

Homework Statement The metabolism of glucose, C6H12O6, yields Co2(g) and H2O(l) as products. Heat released in the process is converted to useful work with about 70% efficiency. Calculate the mass of glucose metabolized by a 59.0-kg person in climbing a mountain with an elevation gain of...

So i have an organic chemical in a bio-film reactor being diffused into a bio-film and also being metabolized at constant rate R by bacteria. the concentration into the reactor Cin = 2mg/L with f-in at 20 m^3/hr the concentration in the reactor is C1 C3 is the concentration in the...

As a species evolves away from maladaptive forms, there may be occasional reversions. A well-known example is the tail in humans. A very small percentage of humans are born with a tail. My question is this. The appendix is possibly a vestige of an era when human ancestors were able to digest...

Is it safe to assume that catabolic reactions are always exergonic and anabolic reactions are always endergonic? Also, I had a question on energy metabolism. Since the mitochondria is where energy is stored, does that mean that metabolic (energy) pathways only occur in the mitochondria? Or is...

Hi, Does anybody know or have a link on the chemical/metabolic pathways for human body fat? I've been trying to look this up and can't seem to find an answer. I'm curious about this concept. Human body fat is a form of animal fat, so metabolizing it should raise your LDL cholesterol...

I am studying for an exam tomorrow and am having a hard time understanding a couple of things. What exactly if the difference in the chemistry and metabloic role of NADH and NADPH? and How are metabolic pathways (glycolysis, PPP, gluconeogenesis, citrc acid cycle, and oxid...

When a person consumes less than 1000-1200 for a long period of time, their body inturn goes to starvation mode right? And your metabolic rate slows down? Then, by exercising your metablism will increase. If you lower your intake but increase the amount of exercise (or even taken to the extreme...

When does your metabolism typically begin to slow down and gaining weight becomes easier?

Anyone know any good ways to inhibit the P450 enzyme in order to slow down drug metabolism? I know that cannabidiols can be used to inhibit P450, but are there any other ways?? Anyone have any good journal references (I don't have access to scifinder)? Any help would be appreciated...

I can't seem to get this problem to work out...any suggestions? -HOw much water would have to evaporate from the skin/min to take away all of the heat generated by basl metabolism (60kcal/hr) for a 65Kg person.

Hey guys; I've always heard things similar to that instead of eating three meals a day, you should spread the same amount of food over say five meals a day. Eat smaller portions, but more often. I don't understand why (if) this works. If you keep eating small amounts all day long, you...

Hello. Lately, every night before I slept, I felt very hungry. It use to be solved by just eating a piece of bread. But now, I ate a very big serving for dinner and is still hungry before I slept, even toasting some bread wouldn't help. Not just in the evening, now, when I wake up, afternoon, I...

Hey there, My boyfriend is going to be coming home in roughly 3 weeks. I was wondering if it would be possible to lose and inch or so off my waist before he comes home. Is that a realistic achieveable goal? :rolleyes: Your thoughts would most appreciated. Suggestions on how to do this would...

Not sure you guys have seen or talked about this already, but I just got on-line access to New Scientist Magazine. The Feb 12 2005 issue was about creating artificial life. Here's a short summary about a Los Alamos team's attempt to do so: The key difference between life and non-life is...

Please help, I have some problems with understanding bacterial metabolism. If we have bacteria who for example gets energy by oxidizing H2S to S, and than we have one that gets it’s energy by reducing S to H2S, doesn’t that seems like perpetuum mobile. I’m probably missing something here, but I...

Greetings. Recently, my Biology teacher was explaining about metabolism (unlike my other teachers, this one is a good teacher). He said : "catabolism produces energy on the form of ATP because it involves breaking chemical bonds". Now i feel a little confused about this. As far as i know...