Answer:
Speeding up chemical reactions by lowering the activation energy.
Explanation:
Rod: night vision
Cone: day vision
Sodium, potassium, chloride and calcium ions are important for establishing the resting potential of the cell. The sodium-potassium gradient is maintained by a pump which transports 2 potassium inside the cell and 3 sodium ions outside the cell.
The correct solution for this is explained the first option. Since water has an equivalent amount or number of H ions and OH ions, pure water itself is not slightly acidic nor basic. This equality of ions, causes the pH of water to be around the mid point of the pH scale which goes from 0 - 14, and thus is 7. This is a neutral pH.
it allows for nutrients to come into the cell using passive tranport aka moving anything on a gradient without the use of energy (ATP).
