Water and Inorganic Ions Flashcards
What is a cation?
An ion with a positive charge
What is an anion?
An ion with a negative charge
Where are ions found?
In solutions within the cytoplasm and body fluids of organisms.
What is the role of haemoglobin?
Carry oxygen in red blood cells from lungs to respiring cells.
What does haemoglobin consist of ?
-4 polypeptide chains
-One Fe2+ (haem group )
What is the role of Fe2+ in haemoglobin?
Binds with oxygen to become Fe3+ before offloading oxygen in cells.
What is the importance of sodium ions ?
Co transport of glucose in the small intestine.
Generating action potentials in neurons
What is a phosphate ion called when it attaches to another molecule?
Phosphate group
Outline the role of phosphate ions in ATP
The 3rd phosphate is hydrolysed to release energy.
Outline the role of phosphate ions in DNA and RNA.
Phosphate binds to pentose sugar to form sugar phosphate backbone.
Outline the position of phosphate ions in phospholipids.
Phosphate is bound to the glycerol.
How is pH calculated?
The concentration of hydrogen ions in a solution.
What 2 processes do hydrogen ions play a role in?
- Aerobic respiration
- Photosynthesis
What is the concentration of hydrogen ions in an acidic solution?
High
What is the concentration of hydrogen ions in an alkaline solution?
Low
