Muscular System

Front

What is the tissue that surrounds an entire muscle called?

Back

Epimysium

Front

What are the boundaries of sarcomeres known as?

Back

Z lines

Front

Where is calcium stored in muscle cells?

Back

Sarcoplasmic reticulum

Front

What section of a sarcomere is made up of only thin filaments?

Back

I band

Front

Which component of the troponin-tropomyosin complex does calcium bind to?

Back

Troponin

Front

What is the functional unit of a muscle fiber called?

Back

Sarcomere

Front

What is the role of the epimysium in muscle structure?

Back

It provides protection and support to the muscle.

Front

What is the difference between the I band and the A band in a sarcomere?

Back

The I band contains only thin filaments, while the A band contains both thick and thin filaments.

Front

What triggers the release of calcium from the sarcoplasmic reticulum?

Back

An action potential traveling along the muscle fiber.

Front

What is the role of troponin in muscle contraction?

Back

Troponin binds calcium and causes a conformational change that allows muscle contraction.