Ch 2 Chemical Composition of the Body Flashcards
what are the major elements within the body?
oxygen (65%,) carbon (18%,) hydrogen (9.5%) and, nitrogen (3.2%)
what are the mineral elements within the body?
potassium (0.4%), sulfur (0.2%) and, chlorine (0.2%)
2 or more atoms chemically bonded together is?
a molecule
molecules with 2 or more different elements is?
compounds
what is the chemical formula of glucose
C6H12O6
what is more soluble in water, non-polar or polar molecules?
molecules with polar bonds
what is less soluble in water, non-polar or polar molecules?
molecules with non-polar bonds
are ionic bonds stronger or weaker than covalent bonds?
weaker
lots of hydrogen bonds indicate?
a more secure molecule
what are examples of carbohydrates?
polysaccharides and disaccharides
what are examples of lipids?
triglycerides, phospholipids and, steroids
what are examples of proteins?
polypeptides
what are examples are nucleic acids?
DNA and RNA
what % of your body weight is carbohydrates?
1%
what % of your body weight is lipids?
15%
what % of your body weight is proteins?
17%
what % of your body weight is nucleic acids?
2%