Lipids
Energy Storage
• Triglycerides - stored in adipose tissue
– Huge form of energy storage
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Fat cell mobilizes triglycerides
Breaks fatty acids off glycerol molecule
Become free fatty acids and sent to bloodstream
Free fatty acid taken up by cell (i.e. muscle cell)
Broken down into 2 carbon units at a time by beta-oxidation
2 carbon piece becomes Acetyl-CoA
Acetyl-CoA enters citric acid cycle
Citric acid cycle leads to ETC which forms ATP
(Sanders, 2014)
Saturated vs. Unsaturated Fatty Acids
SATURATED
UNSATURATED
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•
•
•
•
•
•
•
•
•
Same conformation
No double bonds
Mostly from animal sources
Solid at room temp
Cheese, butter , bacon
Irregular conformation
Have double bonds
Mostly from plant sources
Liquid at room temp
Olive oil, peanut oil
(Sanders, 2014)
3-D Model Saturated Fatty Acid
(Lyman, 2013)
3D Model Unsaturated Fatty Acid
(Lyman, 2013)
Role of Fatty Acids
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•
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Make large amounts of ATP
Store energy
Insulates and protects organs (adipose tissue)
Make up cell membrane with phospholipids
Absorption of fat soluble vitamins A,K,D,E
(Sanders, 2014)
Fluid Mosaic of Cell Membrane
(Sanders, 2014)
No-Fat Diet
• Malaise
– Large amount of ATP made when fatty acids are broken down
• Without ATP the body would have no energy source and the result would be hunger, fatigue and possible depression
• Vitamin deficiencies
– Fat-soluble vitamins can not be absorbed by body (A,K,E, & D)
• Issues with skin, eyes, bones, depression and fatigue
• Increased risk of diabetes
– High carbohydrates in most no fat foods
• Increased sugar intake
(Sanders, 2014)
Bibliography
• Lyman, E. (2013). Model building lipids [Web]
Retrieved from http://youtu.be/4km6BOaj9pg
• Sanders, J (2014 February 3). Lipids
[Webinar]. Retrieved from
http://wgu.adobeconnect.com/p46oj5ulh8z/
• Triglycerides - stored in adipose tissue
– Huge form of energy storage
•
•
•
•
•
•
•
•
Fat cell mobilizes triglycerides
Breaks fatty acids off glycerol molecule
Become free fatty acids and sent to bloodstream
Free fatty acid taken up by cell (i.e. muscle cell)
Broken down into 2 carbon units at a time by beta-oxidation
2 carbon piece becomes Acetyl-CoA
Acetyl-CoA enters citric acid cycle
Citric acid cycle leads to ETC which forms ATP
(Sanders, 2014)
Saturated vs. Unsaturated Fatty Acids
SATURATED
UNSATURATED
•
•
•
•
•
•
•
•
•
•
Same conformation
No double bonds
Mostly from animal sources
Solid at room temp
Cheese, butter , bacon
Irregular conformation
Have double bonds
Mostly from plant sources
Liquid at room temp
Olive oil, peanut oil
(Sanders, 2014)
3-D Model Saturated Fatty Acid
(Lyman, 2013)
3D Model Unsaturated Fatty Acid
(Lyman, 2013)
Role of Fatty Acids
•
•
•
•
•
Make large amounts of ATP
Store energy
Insulates and protects organs (adipose tissue)
Make up cell membrane with phospholipids
Absorption of fat soluble vitamins A,K,D,E
(Sanders, 2014)
Fluid Mosaic of Cell Membrane
(Sanders, 2014)
No-Fat Diet
• Malaise
– Large amount of ATP made when fatty acids are broken down
• Without ATP the body would have no energy source and the result would be hunger, fatigue and possible depression
• Vitamin deficiencies
– Fat-soluble vitamins can not be absorbed by body (A,K,E, & D)
• Issues with skin, eyes, bones, depression and fatigue
• Increased risk of diabetes
– High carbohydrates in most no fat foods
• Increased sugar intake
(Sanders, 2014)
Bibliography
• Lyman, E. (2013). Model building lipids [Web]
Retrieved from http://youtu.be/4km6BOaj9pg
• Sanders, J (2014 February 3). Lipids
[Webinar]. Retrieved from
http://wgu.adobeconnect.com/p46oj5ulh8z/
Bibliography: • Lyman, E. (2013). Model building lipids [Web] Retrieved from http://youtu.be/4km6BOaj9pg • Sanders, J (2014 February 3). Lipids [Webinar]. Retrieved from http://wgu.adobeconnect.com/p46oj5ulh8z/