What happens if we drink more sea water?

Normally we do not drink sea water because the salt content present in the sea water can cause serious consequences in our body. Now, normally in our body, the amount of water and salt, inside and outside our cells are same. However, if we drink sea water, the amount of salt outside our cells will increase, making the outside region more concentrated. Hence, to dilute the outside region and maintain balance, inside and outside the cells, the water present inside the cells start flowing outside(diffusion) and causing our cells to shrink. Moreover, to remove the extreme amount of salt, our kidneys will produce more urine. Making us to urinate more water, it causes severe dehydration.