Which of These Statements Correctly Describes Contraction in Skeletal and Smooth

question 65

Multiple Choice

Which of these statements correctly describes contraction in skeletal and smooth muscle?

• A)In skeletal muscle, calcium ion mediates changes in thin filaments that lead to cross-bridge activity; in smooth muscle, calcium ion mediates changes in thick filaments that lead to cross-bridge activity.
• B)In skeletal muscle, troponin and tropomyosin are regulatory proteins; in smooth muscle, troponin is the only regulatory protein on thick filaments.
• C) In skeletal muscle, calcium ion binds to troponin; in smooth muscle, calcium ion binds to calmodulin.
• D) In skeletal muscle, calcium ion binds to calmodulin; in smooth muscle, calcium ion binds to troponin.

Understand the mechanisms and significance of anabolism and catabolism in metabolism.

Describe the role of carbohydrates, fats, and proteins in the human diet and their metabolic breakdown.

Identify the processes involved in energy production within cells, including glycolysis and ATP synthesis.

Understand the difference between anaerobic and aerobic respiration and their implications for energy production.

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