Unit 5 biology Lipids Flashcards

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1
Q

Describe the solubility of lipids

A

Insoluble in water
soluble in organic solvents (solvents)

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2
Q

What are the most common types of lipids?

A

Triglycerides

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3
Q

How are Triglycerides formed?

A

Formed by one glycerol and three fatty acids by condensation

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4
Q

How can they be broken down?

A

Hydrolysis

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5
Q

What are triglycerides called at room temperature?

A

Fats(from animals)

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6
Q

What are triglycerides called when liquids?

A

Oil (mainly from plants, fatty meats, seeds, nuts, milk, and dairy products)

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7
Q

What is the function of lipids?

A

Energy reserves

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8
Q

Where are lipids stored in our body?

A

In adipose tissues as energy reserves

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9
Q

Where is adipose tissues found?

A

Under the skin as subcutaneous fat or around the internal organs.
(can be broken down to provide energy)

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10
Q

What is the second function of lipids?

A

As a shock absorber

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11
Q

How do lipids absorb shock?

A

Fat stored in adipose tissues around the internal organs acts as a shock absorber to protect the internal organs

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12
Q

What is the third function of lipids?

A

As a heat insulator

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13
Q

How do lipids act as heat insulators?

A

Subcutaneous fat acts as such to reduce heat loss from the body

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14
Q

What is the fourth function of lipids?

A

Involved in the absorption, transport and storage of lipid-soluble vitamins (A/D)

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15
Q

What is the fifth function of lipids?

A

To produce some hormones (sex hormones)

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16
Q

What is the sixth function of lipids?

A

As a component of cell membranes
(Phospholipids are the major component of cell membranes)

17
Q

How to test for lipids?

A

The grease spot test
If the translucent spot that appears on the filter paper disappears after being immersed into an organic solvent then lipids are present