Muscular System - Biology

What type of muscle controls voluntary movement?

• Cardiac muscle
• Skeletal muscle
• Smooth muscle
• Tendons
• Ligaments

Answer explanation

Skeletal muscles are responsible for voluntary movement.

Which type of muscle is found in the heart?

• Smooth muscle
• Skeletal muscle
• Cardiac muscle
• Elastic muscle
• Connective tissue

Answer explanation

Cardiac muscle contracts involuntarily to pump blood.

Where are smooth muscles primarily located?

• In the heart
• Attached to bones
• In the walls of internal organs
• In the skin
• In the brain

Answer explanation

Smooth muscles are found in the walls of internal organs, controlling involuntary movements.

What does the sliding filament theory explain?

• How nerves communicate
• How muscles contract
• How bones move
• How tendons attach to bones
• How muscles grow

Answer explanation

The sliding filament theory explains how actin and myosin filaments interact to contract muscles.

Which protein filaments are involved in the sliding filament theory?

• Actin and collagen
• Myosin and collagen
• Actin and myosin
• Collagen and elastin
• Elastin and myosin

Answer explanation

The sliding filament theory involves actin (thin filaments) and myosin (thick filaments).

What triggers muscle contraction in the sliding filament theory?

• ATP
• Nerves
• Calcium ions
• Oxygen
• Sodium ions

Answer explanation

Calcium ions bind to proteins, allowing actin and myosin to interact and contract.

What does skeletal muscle primarily do?

• Generate heat
• Control the heartbeat
• Move bones
• Transport oxygen
• Produce red blood cells

Answer explanation

Skeletal muscles move bones and are responsible for voluntary movement.

What role do tendons play in the muscular system?

• Connect muscles to bones
• Connect muscles to each other
• Connect bones to bones
• Store nutrients
• Store calcium

Answer explanation

Tendons attach muscles to bones, allowing movement.

What type of muscle cells are striated in appearance?

• Smooth and cardiac
• Cardiac and skeletal
• Smooth and skeletal
• All three types
• None of the above

Answer explanation

Both cardiac and skeletal muscles are striated due to their filament arrangements.

Which of the following is a characteristic of smooth muscle cells?

• Voluntary control
• Striated appearance
• Found in internal organs
• Attached to bones
• Responsible for reflex actions

Answer explanation

Smooth muscles are non-striated, involuntary muscles found in internal organs.