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Muscle Tissue

Smooth Muscle Histology Practice Questions

20 free Smooth Muscle Histology 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.

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All Smooth Muscle Histology questions

20 questions
  1. Q1. Which of the following describes the characteristic shape of a single smooth muscle cell?
  2. Q2. In a smooth muscle cell, where is the single, elongated nucleus typically located?
  3. Q3. Which structure in smooth muscle is functionally analogous to the Z-discs of striated muscle?
  4. Q4. What is the primary protein composition of the 'dense bodies' found in the sarcoplasm and on the sarcolemma?
  5. Q5. Smooth muscle lacks T-tubules. Which invaginations of the sarcolemma are thought to function similarly by sequestering calcium ions?
  6. Q6. Which regulatory protein does calcium bind to in order to initiate smooth muscle contraction?
  7. Q7. Which enzyme is responsible for phosphorylating the myosin head to allow it to bind to actin in smooth muscle?
  8. Q8. How are smooth muscle cells typically organized in the walls of hollow organs like the intestine?
  9. Q9. Which of the following is true regarding the sarcoplasmic reticulum (SR) in smooth muscle compared to skeletal muscle?
  10. Q10. Which type of smooth muscle organization involves cells acting independently and being richly innervated by individual nerve endings?
  11. Q11. Unitary (visceral) smooth muscle cells are functionally linked by which histological feature?
  12. Q12. Which intermediate filament protein is most characteristic of smooth muscle in the vascular system?
  13. Q13. Smooth muscle cells are capable of synthesizing which extracellular matrix components?
  14. Q14. Under a light microscope, how does a cross-section of smooth muscle appear compared to a longitudinal section?
  15. Q15. What is the primary mechanism for terminating a smooth muscle contraction?
  16. Q16. Smooth muscle is innervated by the autonomic nervous system. What are the 'swellings' along the axons that release neurotransmitters called?
  17. Q17. Which of the following describes the regenerative capacity of smooth muscle?
  18. Q18. The 'latch state' in smooth muscle is biologically significant because it allows for:
  19. Q19. What happens to the appearance of the smooth muscle cell nucleus during powerful contraction?
  20. Q20. Smooth muscle cells are surrounded by a layer equivalent to the basal lamina of other cells, called the: