Question

fill in the blank question ca²⁺ ions are stored in the endoplasmic (to receive credit, please spell out your answers) need help? review these concept resources.

Explanation:

Calcium ions ($Ca^{2+}$) are stored in the smooth endoplasmic reticulum in cells. This is a well - known fact in cell biology where the smooth endoplasmic reticulum plays an important role in calcium ion storage and release for various cellular functions such as muscle contraction and signal transduction.

Answer:

smooth; reticulum