Macronutrients Flashcards
general formula of carbohydrates?
CH2O
Commonly known as blood sugar
glucose
The sugar of fruits and honey; sweetest of all sugars
fructose
Primarily found in milk as a component of lactose
galactose
glucose + fructose
sucrose or table sugar
glucose + galactose
Lactose
glucose + glucose
maltose
product of starch digestion
maltose
The most significant polysaccharide in human nutrition.
This is the storage form of energy in plants.
starch
Polysaccharides that are not digested by the body and passes through the digestive tract as is.
fiber
is an example of fiber
cellulose
Starch in animals. It is stored in liver and muscle tissue.
glycogen
CHO digestion begins in
mouth through amylase
TRUE OR FALSE: No enzyme for carbohydrates is secreted by the stomach.
TRUE
Since CHO is the major source of energy, it is recommended that ______ of the calorie intake per day should come from it.
55%-75%
CHO exert a _______ action
protein-sparing action
If insufficient carbohydrates are available in the diet, the body will convert protein to glucose in order to supply energy.
One end-product of fat metabolism are
ketones
Excessive ketone produces a condition called
ketosis or acidosis
are important sources of carbohydrates
- whole grains rich in iron, thiamine, niacin
- sweet potatoes
- milk
- sugars and sweets
are macronutrients which primarily provide structural functions to the body.
proteins
Proteins are large complex organic compounds composed of ______ as the building
units/blocks linked together in peptide bonds.
amino acids
The name came from the Greek word “______”, which means “primary” or “holding first place” since it is the first substance recognized as a vital part of living tissue.
protos
protein is made up of _____
carbon, hydrogen, oxygen, and nitrogen
how many percent of protein is nitrogen?
16
those that cannot be synthesized by the body; thus, must be supplied from outside sources.
essential amino acids
those that the body can synthesize; thus, are not necessary for consideration in the diet.
non-essential amino acids
those that the body can synthesize under most conditions but, on certain physiological conditions, may require dietary sources.
conditionally essential amino acids,
What are the non-essential amino acids?
Alanine
Aspartic acid
asparagine
glutamic acid
serine
conditionally essential amino acid
arginine
cysteine
glutamine
glycine
proline
tyrosine
Essential AA
VILLA HM TTH
Protein digestion in the mouth?
only mechanical mastication occurs, no enzyme secreted
Protein digestion in the stomach?
the enzyme pepsin is released which converts CHON to proteases and peptonesm