Muscle Structure & Function

Front

What is the thick filament of the sarcomere known as?

Back

Myosin

Front

What is an individual muscle cell referred to as?

Back

Fiber

Front

Which myofilament has 'heads' that form cross-bridges causing muscle contraction?

Back

Myosin

Front

What structure connects the message from the brain to a muscle?

Back

Motor Neuron

Front

What happens to the actin filaments during the power stroke?

Back

The actin filaments slide past the myosin filaments, causing muscle contraction.

Front

What is the basic contractile unit of a muscle called?

Back

Sarcomere

Front

What is the role of actin in muscle contraction?

Back

Actin filaments slide past myosin filaments to facilitate contraction.

Front

What is the function of myosin heads during muscle contraction?

Back

They form cross-bridges with actin filaments.

Front

What is the term for the repeating units of a myofibril?

Back

Sarcomeres

Front

What is the role of the motor neuron in muscle contraction?

Back

It transmits signals from the brain to the muscle fibers.