What determines the concentrations of normal saline and dextrose given as intravenous fluids in human health care?Multiple choice question.Normal saline and 5% dextrose are isotonic for human tissues.Normal saline and 5% dextrose are hypertonic for human tissues and they can replenish lost nutrients.Normal saline and 5% dextrose are hypotonic, therefore safe, for human tissues.

The concentrations of normal saline and dextrose given as intravenous fluids in human health care are determined by several factors. These include the patient's overall health, their specific medical condition, and their body's current levels of fluids and electrolytes.

1. Normal saline and 5% dextrose are isotonic for human tissues: This means that these solutions have the same concentration of solutes as the cells and blood in the human body. Therefore, they can be safely administered without causing any shifts in fluid balance, which could potentially harm the cells.

2. Normal saline and 5% dextrose are hypertonic for human tissues and they can replenish lost nutrients: This statement is incorrect. Hypertonic solutions have a higher concentration of solutes than the body's cells and blood. If these were administered, they would cause fluid to move out of the cells in an attempt to balance the concentration of solutes, which could lead to cell dehydration and damage.

3. Normal saline and 5% dextrose are hypotonic, therefore safe, for human tissues: This statement is also incorrect. Hypotonic solutions have a lower concentration of solutes than the body's cells and blood. If these were administered, they would cause fluid to move into the cells to balance the concentration of solutes, which could lead to cell swelling and damage.

Therefore, the correct answer is: "Normal saline and 5% dextrose are isotonic for human tissues."