Describe the components involved in a muscle contraction; Explain how muscles contract and relax; Describe the sliding filament model of muscle contraction

Contraction and Relaxation. The sequence of events that result in the contraction of an individual muscle fiber begins with a signal—the neurotransmitter, ACh—from the motor neuron innervating that fiber.

May 13, 2022 · Muscle contraction is described by the sliding filament model of contraction. ACh is the neurotransmitter that binds at the neuromuscular junction (NMJ) to trigger depolarization, and an action potential travels along the sarcolemma to trigger calcium release from SR.

Describe the components involved in a muscle contraction; Explain how muscles contract and relax; Describe the sliding filament model of muscle contraction

When signaled by a motor neuron, a skeletal muscle fiber contracts as the thin filaments are pulled and then slide past the thick filaments within the fiber’s sarcomeres. This process is known as the sliding filament model of muscle contraction (Figure 7.10).

Describe the components involved in a muscle contraction; Explain how muscles contract and relax; Describe the sliding filament model of muscle contraction

Muscle contraction is described by the sliding filament model of contraction. ACh is the neurotransmitter that binds at the neuromuscular junction (NMJ) to trigger depolarization, and an action potential travels along the sarcolemma to trigger calcium release from SR.