Question

question 1
sarcoplasm is the:
a cell membrane of a muscle fiber
b cytoplasm of muscle cells
c contractile thread that extends the length of the muscle fiber
d protein strand composed of actin or myosin
e structural and functional unit of the skeletal muscle cell

Explanation:

Sarco - is a prefix related to muscle. Plasm generally refers to the cytoplasm of a cell. So, sarcoplasm is the cytoplasm of muscle cells.

• Option A: The cell membrane of a muscle fiber is called sarcolemma.
• Option C: The contractile thread that extends the length of the muscle fiber is myofibril.
• Option D: The protein strand composed of actin or myosin is myofilament.
• Option E: The structural and functional unit of the skeletal muscle cell is sarcomere.

Answer:

B. cytoplasm of muscle cells