Other questions in this quiz

2. What is the most basic contractile unit of a muscle?

  • Myofibril
  • Muscle fibre
  • Sarcomere
  • Fasciculus

3. What is the function of calmodulin?

  • To prevent Ca2+ from diffusing out of the sarcoplasmic reticulum
  • To bind to Ca2+ ions in smooth muscle, activating Myosin Kinase
  • To bind to Ca2+ ions in cardiac muscle
  • To bind to Ca2+ ions in smooth muscle, activating cross-bridge formation

4. Which muscle type has the least developed sarcoplasmic reticulum?

  • Striated muscle
  • Smooth muscle
  • Cardiac muscle

5. What is the effect of speeding up the rate of conduction in heart tissue?

  • Dromotropism
  • Chronotropism
  • Inotropism

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