Question $35(1$ point$)$

What process best characterizes $C{a}^{2+}$ movement from the cytosol $($low $C{a}^{2+}$ concentration$)$ into the endoplasmic reticulum $($high $C{a}^{2+}$ concentration$)?$

Calcium ion movement occurs by simple diffusion.

Calcium ion movement occurs by facilitated diffusion using a transporter protein.

Calcium ion movement does not require energy.

Calcium ion $(C{a}^{2+})$ movement is spontaneous.

Calcium ion movement involves activ$$ transport.