digestive system Flashcards
six essential nutrients
- water
- carbohydrates
- lipids
- proteins
- minerals
- vitamins
which nutrients are macromolecules? (4)
- carbs
- lipids
- proteins
- nucleic acid
what are macromolecules
molecules that contain a large amount of of atoms and smaller chemical structures
minerals and vitamins functions/usefulness stuff (6)
- are NOT macromolecules
- essential to the structure and component of the cell
- key component to many chem reactions
- small amounts are needed
- enable certain reactions to occur
- help build bones and cartilage
difference between vitamins and minerals (1 (+1))
vitamins
- organic compounds
- serve as coenzymes
minerals
- inorganic
what are the four important vitamins
vitamin A,B,C,D
vitamin A (2)
- “beauty” vitamin
- skin/hair/nails and visual pigment (at night)
Vitamin b
energy metabolism
vitamin c (3)
- bones and teeth
- immune system
- connective tissue
vitamin d
calcium absorption (bones, teeth)
4 common minerals
- calcium
- iron
- iodine
- potassium/sodium
calcium
growth of bones/teeth (rickets)
iron
blood hemogoblin (anemia
iodine
produce thyroxin (goiter)
potassium/sodium
nerve impulse (nerve disorders)
what is a blood hemogoblin
- a protein in your blood cells that carries o2 to your body’s organs and tissues
-transports co2 from your organs and tissues back to your lungs.
what is thyroxin (5)
- a hormone that is made by the thyroid gland and contains iodine
- increases the rate of chemical reactions in cells
- helps growth and development
- controls how much energy your body uses (metabolic rate)
- involved in digestion, how your heart and muscles work, brain development, and bone health
function of water in the body (6)
- controls body temp
- enables living plants and animal cells to hold their shape
- involves the transport of nutrients at the cell (level) through osmosis and diffusion
- helps digest food
- carries waste—- products resulting from body functions
- major part if all body fluids
what are polymers
a substance or material consisting of large molecules called macromolecules
example subunit of the macromolecule nutrients
carbs: sugars, monosaccharides, and polymers of glucose
lipids: glycerol and fatty acid chains
proteins: polymers of amino acids
nucleic acids: polymers of nucleotides
main function of the macromolecule nutrients
carbs: energy storage
lipids: energy storage and cell membranes
proteins: cell function
nucleid acids: storage of genetic info
example molecule of the macromolecule nutrients
carbs: sugar, starch, glycogen
lipids: fats, oils, and phospholipids.
- (triglycerides, cholesterol
proteins: hemogoblin, enzymes, etc.
nucleic acids: DNA and RNA
disassembling macromolecules- dehydration synthesis (4)
monomers are joined by the removal of H2O, removing one OH from one monomer and the removal of H from the other at the site of bond formation.
- removing water
- involves enzymes
– needs energy
assembling macromolecules- hydrolysis (3)
monomers are released by the addition of a water molecule, adding OH to one monomer and H to the other.
- adding water
- involves enzymes
carbohydrates (4)
- furnishes energy for: body functions, growth and fattening, reproduction
- the largest part of an animal’s food supply (usually the roughage in the diet) and used first by the body for energy
- includes sugars, starches, and cellulose
- made up of carbon, hydrogen, and oxygen (+ glucose)
what is roughage
the indigestible portion of food the body cannot digest. it is used for keeping your digestive system clean and healthy, easing bowel movements, and flushing cholesterol and harmful carcinogens out of the body. basically to just help your digestive system funciton
monosaccharide (reducing sugars)
simple sugars, ratio of 1:2:1– carbon, hydrogen, and oxygen
ex. glucose, galactose, and fructose have the same formula, but different structures
disaccharide
a combination of two mono’s through dehydration synthesis (loss of water)
ex: maltose, sucrose, lactose
opposite reaction is hydrolysis
polysaccharide
many mono’s
ex. starch, glycogen, amylose, and cellulose
glycogen
- animals store carbohydrates in the form of glycogen (polysaccharide)
- stored in liver and muscles
- when glucose is concentrated in blood, glycogen is converted back into monosaccharide glucose units
- used for energy
cellulose
- contains many glucose; not a coiled structure. exist in flat sheets.
- cannot be digested by humans (fibre/roughage)
- holds water in large intestine, thus, helps eliminate wastes
testing for carbs (2)
- benedicts test: blue (copper) reagent turns orange/brick red when exposed to heat if reducing sugars (carbs) are present (HOT WATER BATH)
- starch test: iodine: red/brown. turns black in the presence of starch cus it mixed w the iodine
lipids (4)
- concentrated source of energy (2.25x as much energy as glucose/carbs)
- found in every cell in the body
- made up of carbon, hydrogen, and oxygen
- insoluble in water
what do lipids form
- forms cholesterol, steroids, and other body compounds
what do lipids provide (4)
- energy reserves
- part of the cell membrane
- insulation for the body
- carriers of vitamins
what happens to the body when fat is absent from the diet
skin and hair conditions are affected
lipids when they are solid vs liquid
solid- fat
liquid- oils
triglycerides
formed after combining 1 glycerol (3C alcohol) and 3 fatty acids
saturated fats (5)
- only single bonds
- not easily broken down (fats)
- from animal sources
- solids at room temp
- fats accumulate on arteries
phospholipids
phosphate group bonded to the glycerol backbone. cell membrane
waxes
long-chain fatty acids joined to long-chain alcohols
unsaturated fats (4)
- double bonds
- more easily broken down (oils-liquids)
- from plant sources
- reduce plaque build-up but high poly-unsaturated products may cause cancer (breast and colon)
testing for lipids
- translucence test
- sudan 4 dye test
proteins(4)
- needed for growth and repair of the body
- contains carbon, hydrogen, oxygen, and nitrogen
- they are large macromolecules (polymers) that are made up of hundreds of amino acids chemically bonded together
- made up of 20 different amino acids (ex: antibodies, enzymes, muscles, nerves)
proteins help form the greater part of: (4)
- muscles and internal organs
- skin, hair, wool, and feathers
- woofs and horns
- parts of the cell
what are chains of amino acids called and why
called polypeptides due to the peptide bonds
how many amino acids can the body not make? what is the general name for them
8 amino acids. they are essential amino acids
7 functions of proteins in the body? what is the example for each
- enzymes: pepsin (in stomach)
- storage of amino acids: albumins (in blood)
- transport: hemoglobin
- movement: muscle fiber proteins
- structural: collagen
- hormones: insulin
- protective: antibodies
formation of proteins
- when proteins are made, a water molecule is released (dehydration synthesis). the covalent bond between the acid and amino group is a peptide bond. occurs in the ribosome.
- amino acids are joined using peptide bonds; the order and type of amino acid determine the type of protein
draw a diagram of dehydration synthesis of proteins
do it
structure of proteins (2?)
- polypeptides folded in a 3d shape, the structure is determined by the sequence of amino acids and determines its function
- primary > secondary > tertiary > quaternary structures
denaturation of proteins (3)
- heat, radiation, or change in pH will change the proteins shape
- this changes its physical and biological properties
- a permanent change in shape is called coagulation
testing for proteins
biuret test: blue reagent turns violent when peptide bonds are present
nucleic acids (3)
- found in dna and rna
- contain nitrogen and are processed by liver into uric acid (urea)
- monomer of nucleid acids are nucleotides
nucleotides contain (3)
- phosphate
- sugar
- nitrogen base
what are enzymes6
- most enzymes are proteins (tertiary and quaternary structures)
- act as a catalyst to accelerate a reaction
- not permanently changed in the process
- are specific for what they will catalyze
- reusable
- end in -ase (sucrase (sucrose), lactase (lactose), maltase (maltose))
how do enzymes work
work by weakening bonds which lowers activation energy needed for catalyzed reaction