Fat Flashcards
what do fats contain?
C, H, and O (sometimes N and P)
are fats water soluble; what is a method used to extract them?
no; ether extract
how much more energy do fats have compared to the same amount of carbs or proteins?
2.25x
fatty acids are in a more _____ state
reduced; potential for oxidation
glucose molecules are less _____
reduced; less potential for oxidation
what happens during oxidation?
energy lost
why are fats important?
energy source and essential fatty acids; precursors for hormones; cellular membrane component; carriers for fat-soluble vitamins; protection and insulation
what aids in fat digestion?
salivary lipase, gastric lipase, and pancreatic lipase (this is the primary one doing most of the work)
what emulsifies fats since there’s no gallbladder
bile salts
fat digestion and absorption flow from lumen to blood
lumen, enterocyte, lacteal, lymphatic vessel, thoracic duct, blood stream
how do we classify fats?
by C chain length
what are the 3 C chain lengths of fats?
long (13+ C)
medium (6-12 C)
short (2-5 C)
how do we classify saturated and unsaturated fats?
by double bond numbers
what are the 3 fat classifications?
saturated (no double bonds)
monounsaturated (single double bond)
polyunsaturated (multiple double bonds)
are saturated or unsaturated fats better for you?
unsaturated (saturated is like butter but has low density)
