Practice 1: Muscle Structure

Front

A group of fascicles is a _____________.

Back

Muscle

Front

Which myofilament is thick?

Back

Myosin

Front

A muscle is made of many… (one step down)

Back

Fascicles

Front

Which is the smallest?

Back

Myofibril

Front

A group of myofibrils is a _____________.

Back

Muscle fiber

Front

What is the basic unit of a muscle called?

Back

Sarcomere

Front

What are the two main types of myofilaments?

Back

Actin and Myosin

Front

What is the function of myosin in muscle contraction?

Back

Myosin interacts with actin to produce muscle contraction.

Front

What is the role of actin in muscle contraction?

Back

Actin provides a track for myosin to pull on during contraction.

Front

What structure surrounds each muscle fiber?

Back

Endomysium