Chapter 09 Muscle

Chapter 09 Muscle

Complete Chapter Questions With Answers

Sample Questions Are Posted Below

Multiple Choice Questions

1. A myofibril is
   A.A skeletal-muscle cell
   B. Composed of filaments
   C. Composed of proteins
   D. Both a skeletal-muscle cell and composed of filaments
   E. Both composed of filaments and composed of proteins

Bloom’s Level: 1. Remember
Section 9A.01
Topic: Muscular System
 

2. Thick filaments in skeletal muscle are composed of
   A.Actin
   B. Myosin
   C. Troponin
   D. Calmodulin
   E. Tropomyosin

Bloom’s Level: 1. Remember
Section 9A.01
Topic: Muscular System
 

3. During isotonic contraction of a skeletal-muscle fiber the
   A.Sarcomeres shorten
   B. A bands shorten
   C. I bands shorten
   D. Both sarcomeres shorten and I bands shorten are correct
   E. Both A bands shorten and I bands shorten are correct

Bloom’s Level: 1. Remember
Section 9A.03
Topic: Muscular System
 

4. Which of the following statements regarding the shortening of a skeletal-muscle fiber is not true? When a skeletal-muscle fiber shortens, the
   A.Sarcomeres shorten
   B. Distance between Z lines decreases
   C. Myofilaments shorten
   D. Myofilaments slide past each other
   E. Length of the A bands remains the same

Bloom’s Level: 1. Remember
Section 9A.02
Topic: Muscular System
 

5. In skeletal muscle, calcium facilitates contraction by binding to
   A.Tropomyosin
   B. Actin
   C. Troponin
   D. Myosin
   E. The thick filament

Bloom’s Level: 1. Remember
Section 9A.02
Topic: Muscular System