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After a meal, most of the fat that eventually empties into the blood is in the form of particles known as
A compound composed of carbon, hydrogen, and oxygen with 3 fatty acids attached to a molecule of glycerol would be known as a
How is soluble fiber in the diet thought to help lower blood cholesterol level?
It enhances excretion of bile leading to increased cholesterol turnover
Oil that is partially hydrogenated sometimes changes one or more of its double bond configurations from
cis to trans
What characteristics is shared by olive oil and canola oil?
both contain high levels of monounsaturated fatty acids
What describes a feature of cis-fatty acids and trans-fatty acids?
In the body, trans-fatty acids are metabolized more like saturated fats than like unsaturated fats
What is a characteristic of lipids
corn oil and sunflower are more prone to spoilage than palm kernel oil
What is a characteristic of the lipase enzymes?
Salivary gland lipase (lingual lipase) plays an active role in fat digestion in infants
What is a conjugated linoleic acid?
A fatty acid with the chemical make-up of linoleic acid but with a different configuration
What is another feature of cholesterol?
only about 10% of the body's total cholesterol is extracellular
What is descriptive of fatty acid configuration?
Naturally occurring trans-fatty acids are found in dairy products
What is NOT a characteristic of hydrogenated oils including...
products containing them become rancid sooner, contributing to a shorter shelf life
What is NOT used by food processors to stabilize the lipids in food products
addition of oxidizing chemicals
What part of the gastrointestinal tract is the predominant site of dietary fat hydrolysis?
What structural feature of fatty acids determines their susceptibility to spoilage by oxygen?
Number of double bonds
What would be least effective at preventing oxidation of the polyunsaturated fatty acids in processed foods?
addition of phosphorus
What would be the least effective method to control blood cholesterol levels?
eat more insoluble fiber
When stored at room temperature in loosely capped containers, which of the following dietary lipids would turn rancid in the shortest time?
Your aunt Gladys has a family history of heart disease. She decides to begin eating a bowl of oatmeal every morning to help lower her blood cholesterol. After about a month of following this routine, her cholesterol declined about 5 points. Which of the following is the most likely explanation for this effect?
Oatmeal is high in soluble fibers that trap bile, causing the body to use more cholesterol for bile replacement
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