Microbiology Which of the following is true regarding the action potential of skeletal muscle? A It spreads inward to all pas of the muscle the T-tubules B It has a prolonged plateau phase C It causes the immediate uptake of Ca2+ into the lateral sacs of the sarcoplasmic reticulum D It is longer than the action potential of cardiac muscle 💡 Explanation Which of the following is true regarding the action potential of skeletal muscle? ✓ Correct Answer: A. It spreads inward to all pas of the muscle the T-tubules