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Transcript
Energy
Metabolism
Transformations
and
Interactions
Absorption
To Blood
system
To lymphatic
system
1
Metabolic Processes
 Fuel (Carbohydrates,
(Carbohydrates Lipids
Lipids,
Proteins)
 Metabolism – Transfer of food
energy and nutrients into form
that cells can use
 Maintenance – repairing
i i body
b d
parts and keeping organs
functioning
Adenosine Triphosphate - ATP
ADP
AMP
ATP
2
Reactions – Energy
Common metabolic block
Acetyl CoA
O
CH3 C
S
C A
CoA
3
Metabolic Reactions
Anabolism
– Reactions that build complex molecules from small one
Anabolism
4
Glycogenesis
Metabolic Reactions
Catabolism
– Reactions that break down compounds into small units
5
Catabolism
Glycogenolysis
6
Nutrients & Energy
Metabolic processes producing energy:
Glycolysis
Glucose
Pyruvate
Acetyl CoA
 TCA (Tricarboxylic Acids) cycle
 Electron transport chain
Intermediates
Glucose
yields
energy
Glycolysis
y y
7
Glucose
 The fate of pyruvate
– Anaerobic vs. aerobic pathways
Glucose
 The fate of pyruvate
Anaerobic
 Pyruvate to lactic acid
–Cori cycle
8
Pyruvate to Lactic Acid (Anaerobic)
Cori Cycle
Glucose
The fate of pyruvate
Aerobic
Pyruvate to acetyl CoA
9
Pyruvate
to
Acetyl CoA
(Aerobic)
Energy balance
from glucose
aerobic
metabolism
10
Fatty Acids to Acetyl CoA
Fats Enter the Energy Pathway
β
β-Oxidation
11
The Carbons of a Typical Triglyceride
Glycerol
Fatty acids
18 C
18 C
18 C
3C
54 C
27 Acetyl CoA
Energy balance
from fat
aerobic
metabolism
27
54
81
27
180
Acetyl CoA
27 Acetyl CoA
from C18:1 TG
Fat
12
Amino Acids
Many amino
acids are
transferred
into glucose Glucogenic
Some amino
acids are
Directly
transferred
into acetyl CoAKetogenic
Some amino acids
can enter directly
TCA cycle Glucogenic
Amino Acids
Deamination
Amino acids synthesis
– Keto acid
– Ammonia
13
Amino Acids
Ammonia
to
urea
Urea
excretion
via
kidneys
14
The Sources of Pyruvate and Acetyl CoA
Glutamic Acid
Arginine
Histidine
Glutamine
Proline
Alanine
Cysteine
Glycine
Serine
Threonine
β-oxidation
Phenylalanine
Tyrosine
Leucine
Lysine
Tryptophan
15