Muscle Types and Functions Quiz

What are the three types of muscle?

• Skeletal, Smooth, Cardiac

• Skeletal, Elastic, Cardiac

• Smooth, Elastic, Involuntary

• Cardiac, Skeletal, Voluntary

What is skeletal muscle?

• Muscle that is found in the walls of internal organs

• Muscle that contracts involuntarily to regulate bodily functions

• Muscle that attaches to bones and allows voluntary movement

• Muscle that makes up the walls of the heart

What is meant by "antagonistic pair"?

• Two muscles that contract simultaneously

• A pair of muscles working together to perform the same movement

• Two muscles working in opposition to control movement

• A pair of muscles attached to different bones

Describe the adaptations of a muscle cell:

• Muscle cells are short, wide, and contain no organelles

• Muscle cells are long, contain multiple nuclei, and have many mitochondria

• Muscle cells are circular, single-nucleated, and low in mitochondria

• Muscle cells are flat and specialized for storing energy

What is a myofibril?

• A bundle of muscle cells that form muscle tissue

• A contractile unit within a muscle fiber composed of actin and myosin

• A protein that stores calcium for muscle contraction

• A connective tissue layer that surrounds muscle

What is the sarcoplasmic reticulum?

• A specialized structure for storing ATP in muscle cells

• The network of tubules that stores and releases calcium ions

• The cell membrane of a muscle fiber

• The contractile unit of a muscle cell

What ion is required for muscle contraction?

• Sodium (Na⁺)

• Calcium (Ca²⁺)

• Potassium (K⁺)

• Magnesium (Mg²⁺)

What is myosin also known as?

• Thin filament

• Thick filament

• Cross-bridge protein

• Sarcolemma

What is actin also known as?

• Thin filament

• Thick filament

• Cross-bridge protein

• Sarcolemma

What is a sarcomere?

• The fluid-filled space between two muscle fibers

• The contractile unit of a myofibril between two Z lines

• A protein that binds calcium ions in muscle cells

• A region of connective tissue surrounding muscle