Question

The contraction of skeletal muscles is based on _____. the contraction of skeletal muscles is based on _____. actin and myosin filaments both coiling up to become shorter

Answer 1

According to the sliding filament model of muscle contraction, skeletal muscles contract as thin actin filaments slide past thick myosin filaments within the sarcomeres. The repeated attachment and pulling of myosin heads on actin filaments causes the sarcomeres to shorten.

Step-by-step explanation:

According to the sliding filament model of muscle contraction, skeletal muscle fibers contract as the thin actin filaments slide past the thick myosin filaments within the sarcomeres. This sliding is caused by the repeated attachment and pulling of myosin heads on actin filaments. As a result, the sarcomeres shorten, leading to the contraction of the muscle fiber.

Answer 2

I believe that the contraction of skeletal muscles is based on myosin cross bridges binding to actin the n flexing. Skeletal muscles consists of a repeating structure of myosin and actin fibers. Each myosin thick filament is surrounded by actin filaments, and each thin filament is surrounded by thick filaments. Several of these filaments bundles makes up the functional portion of a muscle cell.