Final answer:
The function of the uptake systems in astrocytes is to remove K⁺ ions from the extracellular space.
Step-by-step explanation:
The function of the uptake systems in astrocytes is to remove K⁺ ions from the extracellular space. Astrocytes play a crucial role in regulating the concentration of potassium (K⁺) ions in the brain. They help maintain a balance between the extracellular and intracellular potassium levels, ensuring the proper functioning of neurons and overall brain health.