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Muscle Sarcomere Anatomy
Test Description: Questions about proteins and movements of sarcomere.
Instructions: Answer all questions to get your test result.
1) The Light I Band consists of...
A
Actin filaments only
B
none of these
C
Myosin filaments only
D
Myosin and actin filaments
2) The functional unit of the muscle cell is the:
A
Osteon
B
Muscle fiber
C
Sarcomere
D
Myofilament
3) The thick filament is composed of:
A
Nebulin
B
Actin
C
Myomesin
D
Myosin
4) The thin filament is composed of:
A
Nebulin
B
Myosin
C
Myomesin
D
Actin
5) Fill-in-the-blank! Muscle, Fascicle, _____, Myofibril
A
Myofilament
B
Sarcomere
C
Actin
D
Muscle fiber
6) Actin filaments our bound to the edges of the sarcomere, also known as the...
A
H-Zone
B
M-Line
C
A-Band
D
Correct Z-Disc
7) The ________ functions in regulation of Ca2+ levels.
A
Mitochondria
B
Fascicle
C
Sarcoplasmic Reticulum
D
T Tubules
8) ___ and ___ are regulatory proteins bound to actin.
A
Myosin and actin
B
Glycogen and hemoglobin
C
Troponin and tropomyosin
D
Calcium and Oxygen
9) Which of the following is NOT a function of the muscular system?
A
Heat production
B
Joint stability
C
Communication
D
Movement
10) Which of the following sections of a sarcomere does not shorten during contraction?
A
I band
B
H zone
C
Distance between Z lines
D
A band
*select an answer for all questions
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