9th Grade Muscular System Quiz

Which of the following is NOT one of the three main types of muscle in mammals?

• Skeletal muscle

• Smooth muscle

• Striated muscle

• Cardiac muscle

What percentage of an average adult male's body is made up of skeletal muscle?

• 20-30%

• 30-40%

• 40-50%

• 50-60%

Skeletal muscles that work in pairs to move bones in opposite directions are called:

• Voluntary pairs

• Antagonistic pairs

• Synergistic pairs

• Complementary pairs

Which of the following is NOT a function of skeletal muscles?

• Moving bones

• Maintaining posture

• Regulating blood flow

• Creating facial expressions

Smooth muscle is classified as:

• Voluntary muscle

• Involuntary muscle

• Striated muscle

• Postural muscle

Where would you NOT find smooth muscle?

• Stomach

• Biceps

• Blood vessels

• Intestines

What is a key characteristic of cardiac muscle?

• It is under conscious control

• It is found throughout the body

• It does not tire

• It contracts and relaxes in short bursts

By the time a person reaches 70 years old, approximately how many times will their heart have beaten?

• 500 million

• 1 billion

• 2.5 billion

• 5 billion

Which type of muscle is responsible for maintaining long, sustained contractions?

• Skeletal muscle

• Cardiac muscle

• Smooth muscle

• Both b and c

What is the primary function of tendons in relation to skeletal muscles?

• To produce energy for muscle contraction

• To attach muscles to bones

• To control involuntary muscle movements

• To store excess nutrients for muscles