What Ion Is Responsible for Initiating Muscle Contraction

question 59

Multiple Choice

What ion is responsible for initiating muscle contraction?

• A) Mg²⁺
• B) Ca²⁺
• C) H⁺
• D) Cl^-
• E) Na⁺

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Definitions:

Labor Curve

A graphical representation showing the relationship between the quantity of labor supplied and the wage rate.

Diminishing Returns

A principle stating that the addition of more of one factor of production, holding all else constant, will at some point yield lower incremental per-unit returns.

Marginal Product

The additional output resulting from the use of one more unit of a variable input, holding other inputs constant.

Cookie Production

The process of baking cookies, which involves mixing ingredients according to a recipe, shaping, and then heating them in an oven until done.