|| Collection of Medicine MCQs (Cardiovascular system) for medical students. Concept based MCQs with detailed explanations which help students to gain valuable insights and gain an edge in competitive examinations. More than just answering MCQs, the explanations will improve the knowledge and understanding about the conditions discussed. Also useful for MD students who are preparing for Superspeciality entrance examinations. Medicine MCQs - Cardiovascular System Kindle Edition: Click Here for a Preview.
Comments and suggestions are most welcome.
The force of muscle contraction can be increased by all of the following except :
A. Increasing the frequency of activation of motor units
B. Increasing the number of motor units activated
C. Increasing the amplitude of action potentials in the motor neurons
D. Recruiting larger motor units
Correct answer : C. Increasing the amplitude of action potentials in the motor neurons
Action potential is an ‘all or none’ phenomenon. Increasing the amplitude beyond the threshold level does not influence the outcome.