How Does the NCKX System Differ from the NCX System

question 43

Multiple Choice

How does the NCKX system differ from the NCX system?

• A) The NCX system is only expressed in the outer segment of vertebrate retinal rod cells.
• B) The NCKX system is only expressed in muscle fibers.
• C) The NCKX system is expressed in the plasma cell membrane, whereas the NCX system is expressed in the sarcoplasmic and endoplasmic reticulum and in mitochondria.
• D) In addition to transporting sodium and calcium, NCKX transports potassium.
• E) The NCKX system is a primary active transport mechanism, whereas the NCX system is a secondary active transport mechanism.

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