Question

question 10
10 points
is the model for our current understanding of skeletal muscle contraction.
a sliding filament model
b contraction regulation system
c excitable myoglobin movement
d lengthening filament mechanism

Explanation:

The sliding filament model explains how skeletal muscle contracts. In this model, thin filaments (actin) slide over thick filaments (myosin) due to cross - bridge cycling. The contraction regulation system is more about how contraction is controlled (like by calcium and regulatory proteins) rather than being the overall model. Excitability is a property of muscle cells, and myoglobin is for oxygen storage. There is no "lengthening filament mechanism" as the main model for contraction.

Answer:

A. sliding filament model