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Which of the following statements about cholesterol biosynthesis is FALSE?
a) The first steps of cholesterol biosynthesis resemble the first steps of ketogenesis.
b) The production of mevalonate controls the production of cholesterol.
c) All of the carbon atoms found in cholesterol come from malonyl-CoA.
d) The thioester bond in acetyl-CoA is a source of free energy that drives the synthesis of cholesterol.
Answer: c) All of the carbon atoms found in cholesterol come from malonyl-CoA.
Category: Biology
Do Keto Diets make you stupid?
The whole deal behind keto diets is that you dont eat carbs so your body goes into ketogenesis and starts using your fat stores as energy. Now Ive heard that during the diet it makes you slower...
I fully believe this! If your brain is used to working of carbs, then suddenly its energy source changes to fat, things can stay exactly the same. Now the question is are these effects permanent? Im in a bachelor of engineering program and I cant afford to get dumber just to lose some body fat.
Thanks :)
Answer: no they don't
Category: Diet & Fitness
How To Make Ketogenesis Work For You
If you take out carbs from your diet and replace them with protein, you will lose weight at the fastest rate possible. The bad news here is that most people do not know how to stay in ketogenesis the right way. ...
Ketogenesis - Wikipedia, the free encyclopedia
Jump to: navigation, search. Ketogenesis Pathway. Ketogenesis is the process by which ketone bodies are produced as a result of fatty acid breakdown. ...
Pentose phosphate pathway
Processing overview; Ketogenesis and utilization. Processing Overview. TAG. FA. Ketone Bodies. adipose tissue. muscle ...
What is Ketogenesis
This condition is termed as ketogenesis or ketosis wherein the body is totally dependent on fats for obtaining energy and sustaining life. ...
Dont you find it ridiculous how people say that eating less causes muscle loss and no fat loss?
Put it this way, its as ridiculous as how if a hiker packs a weeks worth of food in his backpack, and when he has no food, he starts to chop off and cook his own body parts and eats it instead of eating the food he has packed already.
Even Dr. Joel Fuhrman says that the body burns its own fat reserve(ketogenesis) during long periods of fasting or starvation as an attempt to preserve muscle tissue.
Category: Diet & Fitness
ketogenesis - Definition of ketogenesis at YourDictionary.com
Meaning of ketogenesis. Pronunciation of ketogenesis. Definition of the word ketogenesis. Origin of the word ketogenesis ... Browse dictionary definitions near ketogenesis ...
why ketogenesis do not occur in type 2 diabetes mellitus?
what it is relation with insulin
Category: Diabetes
biochem pheochromocytoma mcq need confirmation of answer please?
A middle-aged man presents to his physician because of anxiety attacks accompanied by profuse sweating and heart palpitations.
His physician documents a high blood pressure of 175/110 (hypertension) and orders ultrasound studies that show an adrenal tumor called pheochromocytoma.
The man has also noted weight loss and fatigue over the past month when the attacks began.
Knowing that pheochromocytoma releases epinephrine from the adrenal medulla, alteration of which of the following metabolic processes best explains symptoms of decreased energy and weight loss?
A.
Glycolysis
B.
Lipolysis
C.
Gluconeogenesis
D.
Glycogenolysis
E.
Ketogenesis
heres how i thought about this q: man has an excess of epi released from adrenal medulla so fight or flight response is increased. i ruled out ketones being formed from this and lipolysis because i thought epi doesnt have a direct effect on those processes. glycolysis provides energy so i omitted that too. so its between glycogenolysis and gluconeogenesis...since the latter is used to make glucose from non glucose sources that would cause breakdown of protein and could contribute to the mans weight loss and decreased energy. any help is appreciated...i think its gluconeogenesis as the right answer but im not 100% sure.
Answer: epinephrine acts on the adipocytes directly to increase the formation of cAMP (same mechanism for glucagon; insulin does just the oppposite) and that increases the intracellular mobiliation of TAG.
for the complete set of info please refer to my blog:
medicalresourcesforfree.blospot.com
PS there's no such thing such as beta 3 ceptor
Category: Medicine
Conversion of amino acids to oxaloacetic acid to glucose 6-phosphate is an example of?
A. deamination.
B. glycolysis.
C. beta oxidation.
D. ketogenesis.
E. gluconeogenesis.
Answer: e gluconeogenesis (or b or c my brother guessed this)
Category: Biology
Ketogenesis | Define Ketogenesis at Dictionary.com
Copy & paste this link to your blog or website to reference this page. Added to Favorites. Related Searches. Process of ketogenesi... Gluconeogenesis ...
During starvation, a decrease insulin-to glucagon ration and a decrease in circulating substrates causes all?
of the following EXCEPT?
A) Glycogenesis
B) Protein deamination
C) Gluconeogenesis
D) Lipolysis
E) Ketogenesis
Answer: I'm going to guess, C) Lipolysis... Based on my weak knowledge of endocrinology.
What I'm not going to do is research this for you. I'm sure your teacher would prefer that you do that yourself.
Category: Diabetes
The process of forming glucose from amino acids or glycerol is called?
A. Gluconeogenesis
B. Glycogenesis
C. Ketogenesis
D. Deamination
E. Glycogenolysis
Answer: Gluconeogenesis
Category: Biology
Metabolic map about ketogenesis - Blogger
Metabolic map about ketogenesis. Here it is one metabolic map about the ketone bodies synthesis, a process that occurs in the mitochondria of hepatocytes… http://www.biocarta.com/genes/Metabolism.asp ...
mTORC1 controls fasting-induced ketogenesis and its modulation by ...
Dec 23, 2010 ... During periods of fasting the liver produces ketone bodies, which the peripheral tissues can use as a source of energy.
Another Saturday Team WoD, and some thoughts about paleo and ...
Still better long-term energy than with a Standard American Diet (SAD) with all the carbs and all....but without the headache of a <100 gram carb, ketogenic diet. I'm still leaning more ketogenic, but with some extra carbs thrown in. ...
MitoSciences: Ketogenesis Pathway Diagram
Ketogenesis Pathway Diagram - The common starting point for ketone body formation, fatty acid synthesis along with steroid formation including the synthesis ...
ketogenesis.com: The Leading Diabetes Site on the Net
Ketogenesis definition, the production of ketone bodies in the body, as in diabetes mellitus or low-carbohydrate weight-loss diets. See more.
Word of the Day: Ketogenesis | PEACE LOVE LUNGES
KETOSIS (kee • toh • sis) is a metabolic state in the human body made possible by the process of KETOGENESIS, characterized by elevated levels of ketone.
Ketone body metabolism?
Fatty acids are metabolised into acetyl-Coa by B-oxidation. The acetyl-Coa then enters the citric acid cycle unless there is inadequate glucose, in which case the oxaloacetate enters gluconeogenesis and the fatty acids are oxidised to ketones. These ketones then, apparently, enter the citric acid cycle of other cells. I thought the only reason for ketogenesis was because the citric acid cycle was inactivated...? Any ideas?
Thanks in advance for any and all help.
Answer: Ketone bodies are really just a way to distribute acetyl-CoA to areas of the body that cannot carry out beta oxidation by themselves, and therefore cannot otherwise utilize fatty acids (notably the brain). It's a means to keep the TCA cycle going - the reason the cycle is inactivated in the first place is because it is running low on glucose, and and glycolysis is normally what provides the acetyl-CoA.
The key point to remember is that the TCA cycle (and the electron transport chain) must be kept going in a cell at all times, because that is the only way that the cell can create enough ATP to live. Second point is that nothing in the TCA is actually consumed, except for acetyl-CoA, from which the 2 carbons are transferred to 2 CO2 molecules - everything else just temporarily carries the carbons from acetyl-CoA around.
So, keeping in mind those two points, gluconeogenesis is kind of related, but not in the way you understand it - oxaloacetate does form the substrate for gluconeogenesis, but you can't pull it out of the TCA cycle, or the gluconeogenic cell will die - therefore, new oxaloacetate to be used for gluconeogenesis has to be created from something else (mostly glucogenic amino acids, and to a much smaller extent, the glycerol backbone from fatty acids as well as any odd chain fatty acids that form propionyl-CoA) - I won't try to explain that here. But the point is, you have to look at this oxaloacetate as a separate supply, dedicated to gluconeogenesis, that has to be created by breaking down something else, since you can't take away what is being used in the TCA cycle. So, during fasting, when glucose is limited, you end up having to break down body proteins (mostly from the muscles) in order to create more glucose. Therefore cells that are able to use acetyl-CoA as fuel in the TCA cycle switch to that instead, either by carrying out beta oxidation themselves, or having another cell do the oxidation and export it to them in the form of ketone bodies. This way, the amount of protein that is broken down to create glucose is minimized, and the small amount of glucose is reserved for the cells that absolutely need it.
Category: Biology
Ketogenesis
Ketogenesis The production of ketone bodies (as in diabetes mellitus) ... Ketogenesis is the process by which ketone bodies are produced as a result of fatty acid breakdown. ...
What two substrates can be used for gluconeogenesis to provide glucose and oxaloacetate for the Krebs cycle?
When ketogenesis is providing fuel during the scenario of insufficient carbohydrate intake, what two substrates can be used for gluconeogenesis to provide glucose and to provide oxaloacetate for the Krebs cycle?
Answer: Try http://themedicalbiochemistrypage.org/gluconeogenesis.html
http://library.thinkquest.org/C004535/aerobic_respiration.html
http://journals.cambridge.org/download.php?file=%2FPNS%2FPNS40_01%2FS0029665181000165a.pdf&code=4fe28d8cc99cb66574f024857fd4885c
I have a vague memory of this when studying for a PTI course. Long time ago, hope the above helps.
Category: Diet & Fitness
Ketogenesis - WrongDiagnosis.com
Ketogenesis information including symptoms, causes, diseases, symptoms, treatments, and other medical and health issues.
Ketogenesis | Define Ketogenesis at Dictionary.com
Ketogenesis definition, the production of ketone bodies in the body, as in diabetes mellitus or low-carbohydrate weight-loss diets. See more.
Diet Tube - Ketogenesis: what is it
Ketogenesis. Ketogenesis. what is ketogenesis. In physiological ... A positive sign of ketogenesis testifies a proper functioning of the therapy. ...
Fatty Acid Oxidation
Regulation of Ketogenesis. The fate of the products of fatty acid metabolism is determined ... Ketogenesis takes place primarily in the liver and may by affected by ...
Targeted Ketogenesis | Exercise and the 4 Hour Body Slow Carb Diet
The selective use of carbohydrate loading using targeted ketogenesis with the Tim Ferris 4-Hour Body Slow-Carb Diet.
Wouldnt the use of statins lead to build up of HMG-CoA, promote ketogenesis and increase risk of ketoacidosis?
Statins inhibit HMG-CoA reductase which is the enzyme in melavonate pathway for cholesterol synthesis.
http://en.wikipedia.org/wiki/Statin
HMG-CoA is also in ketogenesis pathway.
http://en.wikipedia.org/wiki/Ketogenesis
Wouldnt the use of statins lead to build up of HMG-CoA, and wouldnt this promote ketogenesis and ketoacidosis?
Answer: Only if the problem is chronic and modified insulin release could not deal with the problem.
Category: Chemistry
ketogenesis - Wiktionary
ketogenesis (uncountable) (physiology, biochemistry) The metabolic breakdown of fatty ... Retrieved from "http://en.wiktionary.org/wiki/ketogenesis" ...
Rage-chan: β-oxidation of FFA and ketogenesis
Ketogenesis is regulated at 1. mobilization of FFA from adipose tissues 2. FFA transport in mitochondria and 3. partition of acetyl-CoA between TCA cycle and ketogenesis. Ketosis occurs in starvation. ...
MitoSciences: Ketogenesis Pathway
Processing of acetoacetyl-CoA to more complex molecules occurs in the cytosol using the key enzymes shown in the ketogenesis pathway diagram. ...
Ketogenesis - Wikipedia, the free encyclopedia
Ketogenesis is the process by which ketone bodies are produced as a result of ... Ketogenesis may or may not occur, depending on levels of available ...
which of the following will be activated in long term starvation condition?
which of the following will be activated in long term starvation condition?
A.Liver glycogenesis
B.Adipose lipogenesis
C.Liver glycolysis
D.Liver ketogenesis
E.Liver protein biosynthesis
Answer: D
Category: Medicine
ketogenesis - definition of ketogenesis in the Medical ...
What is ketogenesis? Meaning of ketogenesis medical term. What does ketogenesis mean? ... In the Ketogenesis process, incomplete fat oxidation stimulates the liver to convert ...
The regulation of ketogenesis.
The regulation of ketogenesis. Foster DW, McGarry JD Ciba Found Symp 1982;87:120 -131. Ketone bodies accumulate in the plasma in conditions of fasting and ...
World of Biochemistry (blog about biochemistry): Ketogenesis (main ...
Ketogenesis - Type of metabolic pathway: anabolic - Main goal: Ketone bodies synthesis from acetyl-CoA - Subcellular localization: mitochondrial matrix - Number of biochemical reactions: 4 (until acetoacetate) ...
ketogenesis - definition of ketogenesis in the Medical dictionary ...
ketogenesis /ke·to·gen·e·sis/ (-jen´ĕ-sis) the production of ketone bodies. ketogenet´icketogen´ic. ke·to·gen·e·sis (k t -j n -s s) ...
the process that uses amino acids and glycerol to form glucose is?
ketogenesis
glycogenesis
lipogenesis
gluconeogenesis
glycolosis
Answer: i am pretty sure is gluconeogenesis ...the definition is production of glucose from non carbohydrate precursors .............amino acids and glycerol are non carbohydrate precursors
Category: Biology
ketogenesis - definition of ketogenesis by the Free Online ...
Translations of ketogenesis. ketogenesis synonyms, ketogenesis antonyms. Information about ketogenesis in the free online English ...
In Ketogenesis, why does the 3rd acetyl coA attack the 2nd carbonyl rather than the one closest to -S-CoA?
Is simply a matter of how the molecule is being held by the enzyme? If there were no set enzyme, would there be any preference in attack? My intuition is that the carbonyl closest to the CoA would actually be more partially positive (and thus more prone to to attack by the 3rd acetyl CoA).
For reference,
http://upload.wikimedia.org/wikipedia/commons/a/ab/Ketogenesis.png
The specific enzyme in question is HMG-CoA Synthase... though my question is more of a "thought" level.
Im sorry if perhaps I wasnt clear: My question is why to Acetoactyl-CoA does the 3rd acetyl coA add in the way it does. (There are two carbonyls on the acetoactyl... why is one favored over the other... is it simply a matter of steric hindrance?)
Answer: it is because,the carbonyl group has a double bond, and as acetyl coA is a electronrich moeity, the double bond between the carbon and oxygen breaks,and the carbon bears a positive charge, where the enzyme can bind without any steric hindrance.
Category: Chemistry
ketogenesis: Definition from Answers.com
ketogenesis n. The formation of ketone bodies, as occurs in diabetes. ketogenic ke togen ic
What Is Ketogenesis?
Ketogenesis is the release of ketones into the body when fat is broken down for energy. ... As of 2010, ketogenesis has been found to be a healthy reaction in the body. ...
How To Make Ketogenesis Work For You | My Affliliate Niche
How To Make Ketogenesis Work For You. Posted on July 1, 2011 by Katherine Crawford. Powered by Max Banner Ads. If you take out carbs from your diet and replace them with protein, you will lose weight at the fastest rate possible. ...
What triggers ketogenesis in your metabolism?
What triggers ketogenesis?
Answer: When you work out you build fatty acid in the body and that the sore feeling you get. If the body does not use or waste the fatty acid then ketogenesis happens. Ketone bodies are produced mainly in the mitochondria of liver cells. Its synthesis occurs in response to low glucose levels in the blood, and after exhaustion of cellular carbohydrate stores, such as glycogen. The production of ketone bodies is then initiated to make available energy that is stored as fatty acids.
Category: Diet & Fitness
All of these processes occur exclusively in liver cells except one, which occurs in all body cells.this is one?
A. Gluconeogenesis
B. Beta oxidation of fats
C. Ketogenesis
D. Deamination and conversion of ammonia to urea
E. Krebs Cycle
Answer: The Krebs cycle occurs in all cells (except erythrocytes) as part of aerobic respiration...
Category: Biology
Ketogenesis
Ketogenesis is the process by which ketone bodies are produced as a result of ... Ketogenesis may or may not occur, depending on levels of available ...
Ketogenic Diets for Weight loss and Epilepsy
Recently, new vocabulary, such as ketogenic, ketosis, and low carbohydrate have stepped into the dieter's world and questioned, or rather challenged, ...