Skeletal muscles_____________?

Related Mcqs:

1. The contractile element in a skeletal muscle is present in______________?

   A. Sarcolemma
   B. Sarcoplasm
   C. Myofibril
   D. Endomysium

2. Skeletal muscles______________?

   A. Contracts when calcium is taken up by sarcoplasmic reticulum
   B. Contracts when actin and myosin filaments shorten
   C. Contraction is initiated by calcium binding to troponin
   D. Contraction is initiated by calcium binding to tropomyosin

3. The skeletal muscle action potential______________?

   A. Is not essential for contraction to occur
   B. Has a prolonged plateau phase?
   C. Spreads in ward to all parts of the muscle via the t- tubule system
   D. Begins with an, in ward movement of K+ ins

4. All are features of skeletal muscle except______________?

   A. Cylindrical
   B. Transverse striation
   C. Centrally placed nuclei
   D. Multiple nuclei

5. A child is below the third percentile for height. Growth velocity is normal, but chronologic age is more than skeletal age. The most likely diagnosis is______________?

   A. Constitutional delay in growth
   B. Genetic short stature
   C. Primordial dwarfism
   D. Hypopituitarism

6. All of the following are true about skeletal muscle except _________________?

   A. They are cylindrical in shape
   B. Have multiple nuclei
   C. Have transverse striations
   D. The nuclei are central

7. Malignant tumour of skeletal muscie is__________________?

   A. Rhabdomyoma
   B. Rhabdomyosarcoma
   C. Leiomyoma
   D. Leiomyosarcoma

8. All of the following decrease skeletal muscle tone by CNS effects except____________?

   A. D-tubocurarin
   B. Diazepam
   C. Beclofen
   D. Mephensin

9. In Radionucide imaging the most useful radio pharmaceutical for skeletal imaging is______________?

   A. Gallium 67 (67 Ga)
   B. Technetium-99m (99m Tc-Sc)
   C. Technetium-99m (99m Tc)
   D. Technetium-99m linked to Methylene disphosonate (99m Tc-MDP)

10. Increase in threshold level on applying subthreshold, slowly rising stimulus is known as ___________?

    A. Adaptation
    B. Accommodation
    C. Refractoriness
    D. Electrotonus