Chapter 9 Muscular System Quiz

Skeletal muscle is involuntary.​

• True

• False

The dark bands of skeletal muscle are made of thick filaments (myosin).​

• True

• False

When lifting a weight, muscles become shorter and thicker but the tone or tension remains the same and is referred to as isometric contraction.​

• True

• False

The movable attachment, where the effects of muscle contraction are seen, is called the origin.​

• True

• False

In performing any given movement, the muscles performing the actual movement are called the prime movers or agonists.​

• True

• False

The ____ is a delicate connective tissue that surrounds the sarcolemma.​

• ​fasciculi

• epimysium

• endomysium

• perimysium

Each individual bundle of muscle cells is called a ____.​

• fascicle

• muscle fiber

• myofibril

• microfilament

The coarse irregular connective tissue that surrounds the whole muscle is called the ____.​

• perimysium

• endomysium

• fasciculi

• epimysium

As the nerve impulse of an axon reaches the neuromuscular junction, it triggers the release of a neurotransmitter called ____.​

• acetylcholine

• dopamine

• epinephrine

• norepinephrine

The light bands are made of the thin filaments of the protein ____.​

• myosin

• actin

• tropomyosin

• troponin