Ch 5 & 6 - Muscles

A muscle of group of muscles opposing an action

• Agonist

• Antagonist

A muscle or group of muscles producing a desired effect

• Agonist

• Antagonist

When the bicep contracts and tricep relaxes, the bicep is the

• Agonist

• Antagonist

Skeletal muscle is made up of numerous cylinder-shape cells called

• Muscle fibers

• Myofilaments

• Myofibrils

• Myosins

This contains the contractile machinery which includes the sarcomeres and myofilaments

• Muscle fiber

• Muscle belly

• Myofibrils

• Sarcolemma

Each sarcomere is made up of 2 types of protein filaments. The thick filament is

• Actin

• Myosin

Which muscle fiber type is more aerobic?

• Type I

• Type II

• Fast twitch

• White

Which muscle fiber is larger, fatigues faster, and are white in appearance?

• Slow twitch

• Fast twitch

During extension of the elbow, the biceps act as the antagonist.

• True

• False

Fast twitch fibers are larger than slow twitch fibers.

• True

• False