(2.4) inorganic ions Flashcards
what are ions with a positive charge?
cations
what are ions with a negative charge?
anions
what are ions that don’t contain carbon?
inorganic ions
what’s the role of haemoglobin?
to carry oxygen in red blood cells from the lungs to the respiring cells
what does haemoglobin consist of?
4 polypeptides and Fe2+
what’s the role of Fe2+ in haemoglobin?
it binds with the O2 to become Fe3+ before off-loading O2 in cells
importance of sodium ions:
co-transport of glucose in the small intestine
generating action potentials in neurones (A2)
What’s it called when PO4^3- is attached to another molecules molecule?
phosphate group
what molecules contain PO4^3-? (4 e.g.)
ATP
DNA
RNA
Phospholipids
what does a phosphate group do in ATP?
the 3rd phosphate is hydrolysed to release energy
what does a phosphate group do in DNA and RNA?
it binds to the pentose sugar to form sugar phosphate backbones
what does a phosphate group do in phospholipids?
it’s bound to the glycerol
- hydrophilic, forming the phospholipid bilayer
How is pH calculated?
depending on the concentration of H+ ions in a solution
the more H+ present, the….?
lower the pH = more acidic
