Chapter 2 Flashcards
4 most important elements in the body
Carbon, hydrogen, oxygen, nitrogen
5 main elements in the body
Ca P K Na Cl
5 trace elements
Si F Cu Mn Zn
Isotopes
- different number of neutrons
* changes mass
Ions
- Different number of electrons
* change in charge
Ionic bonds are held together by
Trading electrons
Gain electrons
Covalent bonds are held together by
Electron sharing
Important properties of water due to hydrogen bonding
- high surface tension
- resists evaporation
- helps shape proteins and DNA
Exergonic
Releases energy
Endergonic
Takes in energy
Enzyme
Protein that promotes chemical reactions by by lowering the activation energy
Pathway
Complex reactions that require multiple steps, intermediates, and enzymes
Nutrient
Essential molecules obtained from the food you eat
Metabolites
All the molecules that can be used in chemical reactions in your body
Organic v inorganic compounds
Organic contain carbon inorganic primarily made of something else
Important properties of water
- solubility
- reactivity
- lubrication
- high heat capacity
pH
The concentration of hydrogen ions in a solution
Acid
Compounds that release H+ when dissociated
Bases
Compounds that remove H+ from a solution by releasing OH-
Salt
Ionic compound that doesn’t contain H+ or OH-
Buffer
Compound that stabilizes pH
Carbohydrate monomer unit example, and function
- monosaccharide
- glycogen
- short term energy storage
Lipid monomer unit, example, and function
- triglyceride
- fats
- long term energy storage
Protein monomer unit, example, and function
Amino acids
Enzyme
Catalyze reactions
Nucleus acid monomer unit, example, and function
Nucleotide
DNA
Code for protein synthesis
Molecule
When atoms of the same type bond
Compounds
When different types of atoms bond
Hydrogen bond
When a slightly positive hydrogen is attracted to a slightly negative oxygen on a different molecule
Colloids
Aqueous solution with big particles that dont settle out
Suspension
Solution containing large molecules that will eventually settle out
Electrolytes
Dissociated ions that carry a charge that are important for body signaling
Acid range
0-6
Base range
8-14
Normal blood ph
7.35-7.45
Acidosis
Blood ph gets too low
Alkadosis
Blood ph gets too high