Question

question
______ connect(s) thick filaments and thin filaments during a contraction.
answer
terminal cisternae
sarcolemma
cross - bridges
active site
i dont know yet

Explanation:

During muscle contraction, cross - bridges formed by myosin heads on thick filaments bind to active sites on thin filaments (actin). Terminal cisternae are part of the sarcoplasmic reticulum and store calcium. Sarcolemma is the muscle cell membrane. The cross - bridges are what connect thick and thin filaments during contraction.

Answer:

C. Cross - bridges