Lipids SB
Some fatty acids must be obtained from the diet because the body cannot synthesize them. The term given to this group of compounds is ___ fatty acids.
essential
A fatty acid has a double bond in its carbon chain. It is a(n) ______ fatty acid.
unsaturated
Which of the following is a type of connective tissue that provides energy storage, thermal insulation, and protective cushioning?
Adipose tissue
Which term refers to the dual nature of phospholipids, which contain both hydrophilic and hydrophobic groups?
Amphipathic
True or false: Saturated fatty acids contain one or more double bonds.
False
True or false: Unsaturated fatty acids do not have double bonds.
False
Which of the following molecules are the major component of the plasma membrane?
Phospholipids
Which type of eicosanoid is a modified fatty acid with a single five-carbon ring?
Prostaglandin
Which are classifications of fatty acids?
Saturated and unsaturated
A fatty acid contains the maximum number of hydrogens possible. It is ______.
saturated
A hydrophobic organic compound composed mainly of carbon and a high ratio of hydrogen to oxygen is a ______. Examples include fatty acids, fats, phospholipids, steroids, and prostaglandins.
Lipid
Hydrophobic organic molecules, such as fatty acids, fats, steroids, and prostaglandins, are classified as what type of molecule?
Lipid
Fatty acids contain ______ groups.
Methyl Carboxyl
Estrogen and testosterone are examples of which type of lipid?
Steroids
Choose the lipids in the list below.
Steroids Fatty acids Eicosanoids Triglycerides Phospholipids
Which are examples of lipids?
Steroids Phospholipids Triglycerides Fatty acids
Identify the components of a triglyceride below. Choose all that apply.
Three fatty acids Glycerol
How many double covalent bonds are in the carbon chain of a polyunsaturated fatty acid?
Two or more
Which steroid is a precursor for all other steroids in the body?
Cholesterol
Which steroid molecule are all of the other steroids derived from?
Cholesterol
Which is a 20-carbon compound derived from arachidonic acid?
Eicosanoids
Which term specifically refers to fatty acids that must be eaten since the human body is unable to synthesize them?
Essential fatty acids
What are the functions of adipose tissue?
Insulation Energy storage Cushioning
Which type of fatty acid has two or more double bonds within its carbon chain?
Polyunsaturated
Molecules described as ___, such as phospholipids, contain both a hydrophobic and a hydrophilic region.
amphipathic
A(n) ___ is a lipid that consists of two hydrophobic fatty acid tails and a hydrophilic phosphate head.
phospholipid
A ______ is a common signaling molecule derived from a fatty acid.
prostaglandin
___ is the general term for a lipid molecule that consists of four interconnected carbon rings. Examples are cholesterol, testosterone, or estrogen.
steroid
A lipid composed of three fatty acids joined to a glycerol is a(n)
triglyceride, triglycerol, triacylglycerol, triglycerides, or Triglyceride