Figure 9.3 -Muscle Cells, When an Individual Is Exercising Heavily and When

question 94

Multiple Choice

Figure 9.3
-Muscle cells, when an individual is exercising heavily and when the muscle becomes oxygen deprived, convert pyruvate to lactate. What happens to the lactate in skeletal muscle cells?

• A)It is converted to NAD⁺.
• B)It produces CO₂ and water.
• C)It is taken to the liver and converted back to pyruvate.
• D)It reduces FADH₂ to FAD⁺.
• E)It is converted to alcohol.

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Definitions:

Receptor

A molecular structure within or on the surface of a cell that binds to specific molecules like hormones or neurotransmitters, triggering a specific cellular response.

Histamine

Substance released from mast cells that causes inflammation.

Allergic Reaction

An immune system response to a foreign substance that is not typically harmful to the body, such as pollen or certain foods.

Local Regulator

A substance (often a small protein or peptide) that acts near its site of secretion to regulate cellular or physiological activities.