Chapter 7 Flashcards
Energy Metabolism
How body obtains & uses energy
from food
Liver cells
most versatile & metabolically active(a lot of reactions and gluconeogenesis
Anabolism (and requires what)
- building up of body compounds
- Requires energy (building reaction)
Catabolism(releases what)
breaking down of body compounds
-Releases -energy (breakdown reaction
Coupled Reactions
– Hydrolysis (breakdown) of ATP occurs at same time as reactions that will USE energy to build compounds
What is ATP used for?
Body uses ATP to transfer the energy released during CATABOLIC reaction to power its anabolic reaction
“Energy” to ATP
50%
Coenzymes
- Organic – but not PROTEINS
- B vitamins can act as coenzymes
Whats derived from CHo
glucose
Whats derived from PRO
amino acids
Whats derived from TG
glycerol and fatty acids
Discuss pyruvate in general
- 3-carbon structure
- can be used to make glucose
Discuss Acetyl CoA
- 2 carbon structure
- cannot be used to make glucose
Where are the hydrogen atoms carried?
to the electron transport chain
What is glucose splitting
glycolysis
Can pyruvate be converted back to glucose?
yes
Two Pyruvate Energy Need Options
- anaerobic
- aerobic
Anaerobic
- pyruvate to lactate
- quick energy need
- makes quickly but doesn’t last long
ex. 200-800m run
Aerobic
slower energy needs
-pyruvate to acetyl COa
Pyruvate to Lactate Effects
-hydrogen(which causes burning)
- acidity
- fatigue
Cori Cycle
lactate taken to liver and reconverted into glucose
Where does pyruvate enter and what’s removed?
- pyruvate enters mitochondria of cell
- carbon removed ……becomes carbon dioxide
What makes acetyl Coa and is it undoable?
- 2 carbon compound
- irreversible
Acetyl Coa’ options
- synthesize fats when ATP is abundant
2. generate ATp through TCA cycle
