Answer:
9 is clay, silt, sand in that order
Explanation:
It is supposed to protect the cell from it's surroundings, or from the outside.
Answer:
Active transport by the Na+-K+ pump
Explanation:
Active transport by the Na+-K+ pump
Maintenance (and restoration) of the resting ion concentrations depends on the Na+-K+ pump. Once gated ion channels are closed, the combined action of the pump and ion leakage (particularly that of K+) establishes a resting membrane potential in a typical neuron of around âˆ'70 mV.
It's called a compound because different elements are held together by a chemical bond.
