Which of the Following Statements About Calcium Is Correct

question 26

Multiple Choice

Which of the following statements about calcium is correct?

• A) Calcium exists mostly outside the cell.
• B) Calcium plays a key role in muscle relaxation.
• C) Plasma calcium levels are regulated by thyroid hormone.
• D) Calcium plays a role in blood formation.

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Definitions:

Stomata

Small openings on the surfaces of leaves and stems through which gases and water vapor pass.

Companion Cells

Plant cells that are part of the phloem tissue and assist in the distribution of nutrients throughout the plant.

Carbon Dioxide

An invisible, scentless gas that is released when carbon and organic compounds burn, and during the breathing process, which is taken in by plants during the process of photosynthesis.

Eudicot Leaves

Leaves belonging to a major group of flowering plants that have a specific vein structure, usually netlike, characteristic of the eudicots.