Muscles Wk 2

What surrounds muscle bundles in skeletal muscles?

Perimysium surrounds muscle bundles.

What connects tendons to in the body?

Tendons connect muscles to bones.

What type of muscle fiber is known for slow twitch characteristics?

Type one muscle fibers are slow twitch.

Which muscle fiber type is classified as fast oxidative?

Type two A

What do fast glycolytic fibers refer to?

Type two B muscle fibers are referred to as fast glycolytic.

What is the basic contractile unit of a muscle fiber?

The sarcomere is the basic contractile unit of a muscle fiber.

What is the role of myofibrils in muscle fibers?

Myofibrils are responsible for muscular contraction.

What type of activities do Type one muscle fibers support?

Type one fibers support aerobic activities like long running and cycling.

Which muscle fiber type is more prone to fatigue?

Type two A muscle fibers are more prone to fatigue than Type one.

What is the neuromuscular junction?

The neuromuscular junction is a specialized synapse where a motor neuron connects with a muscle fiber.

What is muscle glycogen used for in muscle cells?

Muscle glycogen serves as a readily available fuel source for muscle cells.

How does increased strength in muscles relate to muscle fibers?

Stronger muscles have more muscle fibers in each bundle.

What distinguishes type two A fibers from type two B fibers?

Type two A fibers use both aerobic and anaerobic metabolism while type two B fibers primarily use anaerobic metabolism.

What structural feature protects muscles from friction?

Epimysium is connective tissue that protects muscles from friction.