SEHS Topic 3: Energy systems:
ATP-PC
Lactic acid
Aerobic
Simple reaction
More complex
Very complex reaction
Very quick energy
Quick energy
Stores available
Limited stores
Stores available
Efficient use of stores
Seconds of energy
Onset of lactic acid
House of storage
-
ATP-PC:
1. stored ATP
Fuel: creatine phosphate
2. ATP-PC system
Duration: up to 10 seconds
3. Lactic acid system
Intensity: initial/max exercise
4. Aerobic system
Amount of ATP per PC: 1
By Products: none
-
Lactic Acid:
Fuel: glucose (glycogen)
Duration: up to 75 seconds
Intensity: 70%-90% max hr
Amount of ATP per PC: 2-3
By Products: lactic acid
-
Aerobic:
Fuel: glucose, lipids, protein
Duration: 75 seconds plus
Intensity: 60%-80% max hr
Amount of ATP per PC: 34
By Products: carbon dioxide, water, heat
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Ribosomes – site for genetic coding into proteins
Rough endoplasmic reticulum – responsible for manufacturing, processing and transporting
proteins for cell utilization both in and out of the cell
Lysosomes – site for digestion of cell nutrients, excretion, and cell renewal
Golgi Apparatus – transports, modifies, and packs proteins and lipids into the Golgi vesicles to
deliver them to their target sites
Mitochondrion – generates energy for the cell
Nucleus – information center of the cell that controls and regulates cell activities of growth and
maintains cell metabolisms
At rest:
O2 consumption = 3.5 x 1 kg of body weight in 1 min
Example: How much oxygen does this person consume in 1hr at rest?
weight = 65kg
V(O2) = 3.5 x 65 x 60 ml
= 13,650 ml = 13. 65 L of O2
Aerobic
Glucose  pyruvate (by glycolysis)
Pyruvate  Acetyl CoA
Acetyl CoA  H+ + electron carriers  ATP + CO2 +H2O
(Kreb’s cycle)
ETC (electron transport chain)
Location: mitochondria
Anaerobic glycolysis
Glucose  pyruvate + 2ATP (by glycolysis)
Pyruvate  lactic acid = CO2
Location: cytoplasm