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Muscle articulation

week 7

QuestionAnswer
What is an articulation? An articulation, or joint, is the point where two or more bones meet.
What are the three main structural types of joints? Fibrous, cartilaginous, and synovial joints.
What type of joint allows the most movement? Synovial joints.
What produces movement at a joint? Muscle contraction that pulls on tendons attached to bones.
What two proteins are primarily responsible for muscle contraction? Actin and myosin.
What is the role of ATP in muscle contraction? ATP provides energy for myosin heads to detach from actin and reset for the next contraction cycle.
What ion is essential for triggering muscle contraction? Calcium ions (Ca²⁺).
Where is calcium stored inside the muscle cell? In the sarcoplasmic reticulum.
What is the sliding filament theory? It explains how actin and myosin filaments slide past each other to shorten the muscle during contraction.
What structure carries the electrical impulse deep into the muscle fiber? The T-tubules (transverse tubules)
Created by: Tyranique
 

 



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