Smooth and Cardiac Muscle Physiology Practice Questions
20 free Smooth and Cardiac Muscle Physiology practice questions for the Physiology, each with the correct answer and a detailed explanation. Open any question below, or take the full set as an interactive quiz.
Questions
20 questions
All Smooth and Cardiac Muscle Physiology questions
- Q1. Which structural feature distinguishes smooth muscle from skeletal muscle?
- Q2. The primary regulatory protein involved in smooth muscle contraction is:
- Q3. Which ion plays the most critical role in initiating cardiac muscle contraction?
- Q4. Intercalated discs in cardiac muscle primarily function to:
- Q5. Which type of smooth muscle exhibits spontaneous rhythmic contractions?
- Q6. The plateau phase of the cardiac action potential is mainly due to:
- Q7. Which mechanism allows smooth muscle to maintain tension with minimal energy expenditure?
- Q8. Cardiac muscle differs from skeletal muscle in that cardiac muscle:
- Q9. Which protein phosphorylates myosin light chains in smooth muscle?
- Q10. The refractory period of cardiac muscle is long primarily to:
- Q11. Which type of smooth muscle is found in the iris of the eye?
- Q12. In cardiac muscle, calcium that triggers contraction is primarily released from the:
- Q13. Which feature is common to both smooth and cardiac muscle?
- Q14. Which ion channel is responsible for spontaneous depolarization in cardiac pacemaker cells?
- Q15. Smooth muscle contraction can be initiated by all EXCEPT:
- Q16. Which factor primarily determines the strength of cardiac muscle contraction?
- Q17. Compared to skeletal muscle, smooth muscle contracts:
- Q18. Gap junctions in smooth muscle primarily function to:
- Q19. Which component is absent in smooth muscle but present in cardiac muscle?
- Q20. The primary role of the autonomic nervous system in cardiac muscle is to: