Quizzes Flashcards
In terms of energy delivery, please list the systems following from fastest to slowest
ATP Pool
PCr System
Glycolysis
Oxidative metabolism
During the hydrolysis of ATP, ATP become -
`ADP
At Best case, the human body is_____% efficient
25
of mechanical, chemical, thermal etc, which form of energy could you use to define the food we eat?
chemical
how does an enzyme help the rate of a reaction?
lowers the energy of activation
what is the gibbs free energy ^G for the hydolysis of ATP
-7.3 kcal/mol
How many kcal of energy content in 1 gram of carbs?
4
the Q10 effect relates to
enzyme rate in respect to temperature
during the transfer of energy, some will useful while some will contribute to the randomness of a system. the latter is termed?
entropy?
a reaction in which the products aid in an additional reaction is called?
coupled
During exercise, the rate of exercise will dictate the need for energy. as individuals exercise faster, they will rely more on the fast actin anaerobic systems. these systems work in order during intense exercise meaning only one system is supplying energy at one time - this statement is
false.
all systems work at the same time just at different rates
at the muscle the hydrolysis of ATP …
places the myosin head into a high energy state
both the PCR and adenylate kinase systems are extremely fast at replenishing ATP. What else do the two systems have in common?
both are water soluble and occur in the cytosol of the cell
what is the enzyme responsible for breaking down carbohydrates in the mouth?
AMylases
Excess CHO can be stored in adipose sites (fat) or as glycogen in muscle, and the
liver
The process of oxidation and reduction is essential to glycolysis. NAD+ during glycolysis is reduced (hydrogen added) to NADH. Within the process of glycolysis, pyruvate is formed. If not immediately used, pyruvate can quickly become lactate. During this process NADH is oxidised to form NAD+ thus helping to maintain the process of glycolysis. This Statement is;
true
The key to the removal of lactate from a muscle is;
blood flow
% of the glucose that is utilised during glycolysis comes from glycogen stores.
80
Approximately… grams of glycogen is stored in the liver while approximately…… grams are stored in the muscle.
100
400
The enzyme …..
is the major site of regulation for glycolysis.
PFK
phosphofructokinase
If the energy charge of a cell is greater than 0.8, this indicates a greater amount of what compared to what?
ATP compared to ADP & AMP
In the conversion of pyruvate to Acetyl-CoA, CO2 and what are two bi-products.
NADH
A high redox state will …….. glycolysis.
slow down
