Question

maintaining a certain calcium concentration is important for the proper functioning of which cells? check all that apply
skin cells
nerve cells
blood cells
liver cells
muscle cells

Explanation:

Nerve cells rely on calcium for neurotransmitter release and action potential regulation. Muscle cells use calcium for contraction (via actin-myosin interaction). Skin, blood, and liver cells do not depend on precise calcium concentration for core function as directly as nerve and muscle cells.

Answer:

nerve cells, muscle cells