Which of the Following Statements Concerning Calcium Ions Is FALSE

question 10

Multiple Choice

Which of the following statements concerning calcium ions is FALSE?

• A) They are involved in fertilization, blood clotting, and microtubule disassembly.
• B) Their concentration in the cytosol rises when Ca²⁺ gates open in the ER.
• C) Their concentration in the cytosol is usually higher than in the extracellular fluid.
• D) They can act by themselves, without binding to calmodulin.
• E) They can exert an effect after binding to calmodulin.

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Definitions:

Red Bone Marrow

The type of bone marrow that produces blood cells, including red blood cells, white blood cells, and platelets.

Proximal Epiphyses

The end parts of a long bone that are closest to the body's center, involved in growth and development.

Red Bone Marrow

A tissue found within bones that produces new blood cells, including red blood cells, white blood cells, and platelets.

Adult Skeleton

The complete framework of bones in an adult human, typically consisting of 206 bones, providing support and protection for the body's organs.