Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
18 Cards in this Set
- Front
- Back
|
are hydrophilic molecules usually polar or non polar?
|
polar or have polar side groups
|
|
|
hydrophilic molecules
|
have a permanent charge
|
|
|
how do hydrophilic molecules interact with water?
|
-thru dipole-dipole interactions or hydrogen bonds
|
|
|
water solubility
|
- water molecules are polar
-permanent dipole due to the difference in electronegativity btwn 2 positive hydrogens and one negative oxygen -oxygen attracts electrons more than hydrogen atoms |
|
|
which molecules are readily soluble in water?
|
-OH on glucose
-COOH as on amino acids -NH2 -ionic compounds like NaCl |
|
|
dissociation
|
when an ionic compound like NaCl is placed in water and seperates into ions
|
|
|
non polar compounds dissolve in...
|
organic compounds
|
|
|
amphipathic
|
-molecules with polar and non polar regions
-serve as detergents or emulsifiers -bile acids |
|
|
non polar substances do not dissolve in...
|
water
|
|
|
molecules with lots of C's and H's in long chains with no oxygen are usually
|
non polar
|
|
|
name a benefit of of water solubility
|
compounds can be easily transported in the blood such as glucose and ketones
|
|
|
digestion
|
-takes place in the watery environment of the small intestine
-absorption of nutrients into cells of the GI tract and later into the blood |
|
|
bile acids
|
detergent that emulsifies fats
|
|
|
hydrophobic molecules travel in the blood via...
|
carrier molecules, usually a protein
-free fatty acids are bound to albumin |
|
|
lipoproteins
|
carrier for triglycerides and cholesterol
|
|
|
what types of molecules can freely cross a membrane?
|
- hydrophobic molecules
-small, uncharged polar molecules |
|
|
what types of molecules cannot cross a membrane?
|
large, uncharged polar molecules
ions |
|
|
benefits of solubility
|
- water soluble vitamins easily leave the body
-the kidneys will only excrete water soluble compounds |
