Lecture Chapter 2 + 3 Flashcards
What are the four most common elements in the human body?
Oxygen, Carbon, Hydrogen, Nitrogen (then calcium, then phosphorus)
What is covalent bonding?
Sharing of electrons
What are the three types of hydrocarbon skeletons?
Straight chain, branched chain, ring
What does Oxygen do in most molecules?
Creates a negative charge in that location, making the molecule polar.
What charge does Nitrogen have?
Positive
What are hydrogen bonds?
Charge-attraction bonds
What is the term for when, in a molecule, one side is polar, and the other side is nonpolar?
Amphipathic
What is a kind of molecule with a polar side and a non-polar side, and which is which?
Phospholipids (carbon chain side is nonpolar)
What is a liposome?
Artificial membrane often used in drug delivery
How many ions does the sodium-potassium pump move of each ion?
Three sodium ions out for two potassium ions in
What percentage of human cells are made up of water?
60%-80%
What are the seven properties of water, biochemically?
o Regulates body temperature o Universal Solvent o Cushions o Transports o Lubricates o High surface tension o Neutral pH
What is the pH of blood?
Between 7.35 and 7.45
What organs regulate pH?
Kidneys, lungs, and buffers in the blood
What are the three types of mixtures?
Suspension, Colloid, Solution
What are the properties of a suspension?
Large solutes or cells that scatter light and settle if mixture is not in motion (blood)
What are the properties of a colloid?
Scatter Light but do not settle (gelatin)
What are the properties of a solution?
Do not scatter light or settle.(soda)
What are the properties of an emulsion?
Made up of polar and nonpolar substances, blend together for a short time when agitated (oil and water)
What element do organic compounds contain?
Carbon (CO and CO2 are not organic)
What four things do/can organic compounds include?
Carbohydrates, lipids, proteins, and nucleic acids