Question

The tension generated in a skeletal muscle fiber is directly proportional to the number of

A) thick and thin filaments present.
B) nebulin and titin molecules present.
C) high energy crossbridges formed.
D) low energy crossbridges formed.
E) active sarcomeres.

Answer 1

The tension generated in a skeletal muscle fiber is directly proportional to the number of cross-bridges formed between actin and myosin. Cross-bridges can only form where thick and thin filaments overlap, allowing myosin to bind to actin.

Step-by-step explanation:

The tension generated in a skeletal muscle fiber is directly proportional to the number of cross-bridges formed between actin and myosin. Cross-bridges can only form where thick and thin filaments overlap, allowing myosin to bind to actin. If more cross-bridges are formed, more myosin will pull on actin, and more tension will be produced.