The statements about transport of Ca2+ from the cytosol (low Ca2+ concentration) into the endoplasmic reticulum (high Ca2+ concentration) are true EXCEPT which of the following?
A. Calcium movement involves the use of a pump.
B. Calcium movement involves active transport.
C. Calcium movement occurs by facilitated diffusion using a transporter protein.
D. Calcium movement requires energy.
E. Calcium movement occurs through a transmembrane protein.
C. Calcium movement occurs by facilitated diffusion using a transporter protein.
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