Muscle Contraction Practice Questions
19 free Muscle Contraction practice questions for the Histology, each with the correct answer and a detailed explanation. Open any question below, or take the full set as an interactive quiz.
Questions
19 questions
All Muscle Contraction questions
- Q1. Which protein acts as a calcium sensor, shifting the position of tropomyosin to expose myosin-binding sites?
- Q2. What is the specific role of ATP during the 'detachment' phase of the cross-bridge cycle?
- Q3. In skeletal muscle, where is the majority of calcium stored during the relaxed state?
- Q4. What structural change occurs to the H-zone and I-band during a full muscle contraction?
- Q5. The 'Power Stroke' of the cross-bridge cycle is triggered by which of the following events?
- Q6. What is the function of the T-tubules (Transverse Tubules) in skeletal muscle histology?
- Q7. Which large elastic protein anchors the thick filaments to the Z-disc and helps the sarcomere return to its resting length?
- Q8. In smooth muscle, calcium binds to which protein instead of troponin to initiate contraction?
- Q9. What characterizes a 'Motor Unit'?
- Q10. Which enzyme is responsible for 'resetting' the myosin head into its high-energy, cocked position?
- Q11. The 'Triad' in skeletal muscle consists of which three structures?
- Q12. During muscle relaxation, how are calcium levels in the sarcoplasm reduced?
- Q13. What is the primary neurotransmitter released at the neuromuscular junction?
- Q14. Rigor mortis occurs after death because:
- Q15. Which protein found in the Z-disc anchors the thin filaments?
- Q16. The 'latent period' of a muscle twitch represents the time required for:
- Q17. In cardiac muscle, the structure that allows for rapid electrical coupling between cells is the:
- Q18. Smooth muscle contraction is 'tonic' and efficient because of the 'latch state.' This state is characterized by:
- Q19. Which of the following describes the role of Calsequestrin?