Muscle Structure & Contraction

Front

What part of the muscle fiber stores Ca ions and releases them when stimulated?

Back

Sarcoplasmic reticulum

Front

Which happens to cause a muscle contraction?

Back

Myosin pulls on Actin

Front

What does calcium attach to in a muscle contraction?

Back

Troponin

Front

What is the role of mitochondria in muscle contraction?

Back

Synthesis of ATP

Front

What is the name of the location where the neuron and muscle fiber meet?

Back

Neuromuscular junction

Front

What are the two main proteins involved in muscle contraction?

Back

Actin and Myosin

Front

What is the sliding filament theory?

Back

The theory that muscle contraction occurs by the sliding of actin filaments over myosin filaments.

Front

What is the function of tropomyosin in muscle contraction?

Back

It blocks the binding sites on actin for myosin.

Front

What triggers the release of calcium ions from the sarcoplasmic reticulum?

Back

An action potential traveling down the T tubules.

Front

What is the role of ATP in muscle contraction?

Back

ATP provides the energy needed for myosin to pull on actin.