4/4/2017 1 Energy Systems PSK 4U Mr. S. Kelly North Grenville DHS Review… I hope… Three key energy nutrients we get in our food: Carbohydrates: 4.1cal/g Protein: 4.3 cal/ g Fats: 9.3 cal/ g All three are used in various ways to build, re - synthesize, and expend energy.
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Energy Systems - WordPress.com 5 ATP-PC (Anaerobic-Alactic) Pathway cont’d PC is in short supply in muscles After 10-15s of activity, athlete must rely on a secondary system to resynthesize
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4/4/2017
1
Energy Systems
PSK 4U
Mr. S. Kelly
North Grenville DHS
Review… I hope…
Three key energy nutrients we get in our
food:
Carbohydrates: 4.1cal/g
Protein: 4.3 cal/g
Fats: 9.3 cal/g
All three are used in various ways to build,
re-synthesize, and expend energy.
4/4/2017
2
Carbohydrates
Derived from foods that originate as plants
The usual form is glucose, which is stored
in skeletal muscles as glycogen.
Glycogen can be broken down and used
as an energy source during muscular
activity
Metabolism refers to the process by which
the body is supplied with energy through
the assimilation of energy-rich materials.
ATP ADP + P + energy Adenosine triphosphate is the common
energy molecule for all living things
(Lipmann and Kalckar, 1941)
Used to fuel cellular processes
3 phosphates attached by high-energy
bonds to adenine, ribose (a building block
that helps attach adenine and phosphates)
Energy is released when the trailing
phosphate is broken from the ATP.
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Energy Systems? Why? ATP supplies are used very quickly because this