Matching (muscle contraction in everyday activities) 1. isometric contraction a.
ID: 3522523 • Letter: M
Question
Matching (muscle contraction in everyday activities)
1. isometric contraction a. sarcomeres and muscles lengthen to generate force
2. positive contraction b. sarcomeres and muscles shorten to generate force
3. negative contraction c. sarcomeres and muscles stay in the same position to generate force
4. Skeletal and cardiac muscle have striations. Is the A band of a sarcomere, (which is made up of thin myofilaments coming off the Z disc at the end of the sarcomeres in both directions) part of the
a) light striation or
b) dark striation
5. Skeletal and cardiac muscle have striations. Is the I band of a sarcomere, (which is made up of thin myofilaments coming off the Z disc at the end of the sarcomeres in both directions) part of the
a) light striation or
b) dark striation
6. Which of these proteins make up the thin filament of the sarcomere?
a) actin, myosin, troponin
b) myosin, tropomyosin, troponin
c) actin, troponin, tropomyosin
7. Which of these proteins make up the thick filament of the sarcomere?
a) actin only
b) troponin only
c) tropomyosin only
d) myosin only
Explanation / Answer
THE MATCHES STATEMENTS AND KEY WORDS ABOUT MUSCLE CONTRACTION IN EVERYDAY ACTIVITIES ARE FOLLOWING : -
1. Isometric contraction -- sarcomeres and muscle remain in the same position to generate force.
2. In positive contraction, sarcomeres and muscles shortens to generate force.
3. Negative contraction is when sarcomeres and muscles lengthen to generate force.
4. A- band or anisotropic band is the dark striation of thin filament of skeletal and cardiac muscles.
5. I- band or isotropic bands are light striations of thin filaments in cardiac and skeletal muscles.
6. Actin, troponin and tropomyosin are three thin filaments of sarcomere (functional unit of muscle)
7. Myosin is only a thick filament of muscular functional unit (sarcomere).