LIPIDS Flashcards

1
Q

FUNCTIONS OF LIPIDS

A

thermal regulation, protection from mechanical shock, store and furnish chemical energy, store excess calories

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2
Q

Defining parameter

A

SOLUBILITY

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3
Q

Energy storage lipids

A

triacylglycerol

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4
Q

Membrane lipids

A

– sphingoglycolipids, phospholipid, cholesterol

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5
Q

Emulsification lipids

A

bile acid

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6
Q

Messenger lipids

A

steroid, eicosanoid

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7
Q

Protective-coating lipids

A

biological waxes (floor waxes, cosmetic waxes)

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8
Q
  • Converted into smaller molecules when hydrolysis occurs. Except cholesterol.
A

Saponification lipids 125

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9
Q
  • Cannot be broken into smaller units since they do not react with water. There is no hydrolysis that results in no smaller units.
A

Non-saponification lipids 34

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10
Q

Simple lipids

A

(fats and waxes)

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11
Q

Complex lipids

A

phospholipids, glycolipids, lipoproteins

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12
Q

CLASSIFICATION BY STRUCTURE

A

SIMPLE, COMPLEX, STEROIDS, Prostaglandins, thromboxanes, leukotrienes.

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13
Q

Long-chain

A

(C<12 12-26 insoluble)

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14
Q

Medium-chain

A

(C8-10)

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15
Q

Short-chain

A

(C2-6 slightly/ marginally soluble)

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16
Q

4-24 C atoms/ straight chain compounds.

A

Dietary F.A

17
Q

TF Carbon chain and water solubility is inversely proportional

A

T

18
Q

more liquid at room temperature

A

UFA

19
Q

Melting point and size of the carbon is inversely proportional

A

F

20
Q

Do not contain glycerol but contain long-chain

amino alcohol sphingosine

A

SPHINGOLIPIDS

21
Q

Triester of glycerol and long chain of carboxylic acids

called fatty acids.

A

TRIGLYCERIDES

22
Q

Amino group of sphingosine can from an amide

bond with a FA carboxyl

A

Sphingolipids

23
Q

consist of one fatty acid linked to the

amino group of sphingosine by an amide bond

A

Ceramides-

24
Q

– Common constituents of plasma

membranes

A

Sphingomyelin

25
Q

Animal fats and plant oils

A

TRIGLYCERIDES

26
Q

Component of biological membrane

A

Phosphoacylglycerols (phospholipids)

27
Q

Lipid that is a monoester of long-chain carboxylic acids

and long chain alcohols

A

Waxes

28
Q

Often found as markers on cell
membranes and play a large role in tissue
and organ specificity

A

Gangliosides

29
Q

Major role in regulation of calcium and

phosphorus metabolism

A

Vitamin D

30
Q

A fused-ring containing 3 six membered rings and 1 five membered ring (steroid nucleus)

A

Steroids

31
Q

TF Phospholipid membranes with low conc. of
cholesterol have a fluidity intermediate between
crystal and crystal state

A

F

32
Q

Messenger lipid; oxygenated C20 fatty acid

derivative

A

Eicosanoids

33
Q

plays a crucial role in vision

when it is bound to a protein called

A

opsin

34
Q

Metabolic precursor is arachidonic acid

A

Prostaglandins