I'm studying for my Personal Training certificate, and I see this goddamn term used over and over again
what does it mean? I keep seeing terms like puryvate (sp?) = energy substrate deemed as end product of glycosis
I googled it and none of the answers made any sense
12-28-2009, 09:32 PM #1
What the hell does the word Substrate (ie energy substrate) Mean ?
12-28-2009, 09:34 PM #2
- Join Date: Sep 2006
- Age: 29
- Stats: 6'4", 265 lbs
- Posts: 6,970
- BodyPoints: 18279
- Rep Power: 1204
12-28-2009, 09:47 PM #3
12-28-2009, 10:08 PM #4
- Join Date: Oct 2008
- Location: Kansas City, Missouri, United States
- Age: 46
- Stats: 6'2", 220 lbs
- Posts: 631
- Rep Power: 1001
Pyruvate is a by-product of the gycolysis process, where one molecule of glucose produces 2 ATP. If you look at the definitions of pyruvate, you'll find it's the simplest alpha-keto acid. Cells can actually metabolize pyruvate (or use as energy) following a chemical enzymatic reaction. Excess pyruvate becomes lactic acid.
One definition of "substrate" I've found in biochemistry is: "a molecule upon which an enzyme acts. Enzymes catalyze chemical reactions involving the substrate(s). In the case of a single substrate, the substrate binds with the enzyme active site, and an enzyme-substrate complex is formed."
So basically, what your material is saying is that the simple acid, pyruvate, is a molecule on which an enzyme acts as a catalyst in the production of energy. At least that's what I think is being said and someone can correct me if I'm wrong. I've been going through the whole bionergetic continuum stuff myself just today.
Last edited by torn8o; 12-28-2009 at 10:11 PM.NASM CPT
So many of our dreams at first seem impossible, then they seem improbable, and then, when we summon the will, they soon become inevitable. -Christopher Reeve
12-29-2009, 12:25 AM #5
Macronutrients are the three calorie containing nutrients (fats, proteins, and carbohydrates).
They are also the energy substrates that can be broken down in our cells to release their stored energy. Each of our cells contain chemical pathways that convert these substrates to energy that can be used by that cell and other cells of the body.
Glycolysis produces pyruvate (aka pyruvic acid). The fate of pyruvate will be determined by the rate of ATP utilization and the presence of oxygen. In fast glycolysis, pyruvate will be converted to lactic acid then to lactate which can then leave the cell. In slow glycolysis, pyruvate will be converted to acetyl CoA and enter the Krebs Cycle. You produce more ATP per glucose with slow glycolysis but the rate of ATP production is much slower.
12-29-2009, 10:05 AM #6
- Join Date: Jun 2009
- Location: San Antonio, Texas, United States
- Age: 39
- Stats: 5'11", 193 lbs
- Posts: 747
- Rep Power: 250
12-29-2009, 10:34 AM #7
- Join Date: Feb 2007
- Location: Minnesota, United States
- Stats: 6'0", 185 lbs
- Posts: 9,378
- BodyPoints: 628
- Rep Power: 21644
12-29-2009, 11:00 AM #8
So happy I passed Organic Chem and Bio Chem. Never to go back, phew.http://sagefit.wordpress.com/
Becoming A Success In The World Of Fitness
Learn how to make a six figure salary in the world of fitness. Tips for personal trainers, fitness business owners and more.
BS Exercise Physiology
ACSM Certified PT
Owner of Sage: Exclusive Fitness Center in Whitestone, NY and Sage Studios in Astoria, NY.
By INWARI in forum Teen BodybuildingReplies: 16Last Post: 01-25-2015, 01:58 PM
By Benny__Blanco in forum Misc.Replies: 4Last Post: 11-23-2009, 08:26 PM
By DecemberDays86 in forum Misc.Replies: 12Last Post: 10-18-2004, 11:15 AM
By Kid Loops in forum Misc.Replies: 1Last Post: 02-21-2004, 03:06 PM