Muscular System Test

Front

What are the functional characteristics of muscles?

Back

The functional characteristics of muscles include movement, thermoregulation, supporting soft tissues, and regulating blood glucose concentration.

Front

What does Letter A represent in muscle anatomy?

Back

Letter A represents the axon terminal.

Front

What is the connective tissue membrane that extends beyond the muscle fiber forming tendons?

Back

The connective tissue membrane is called the Epimysium.

Front

What structure binds to thin filamentous actin and uses ATP hydrolysis to generate force?

Back

The myosin head binds to thin filamentous actin and uses ATP hydrolysis to generate force.

Front

Which of the following is not a function of the muscular system?

Back

Immune system support is not a function of the muscular system.

Front

Define the term 'muscle fiber'.

Back

A muscle fiber is a single muscle cell that contracts in response to stimulation.

Front

What is the role of myosin in muscle contraction?

Back

Myosin interacts with actin to facilitate muscle contraction through the sliding filament mechanism.

Front

What is the function of tropomyosin in muscle fibers?

Back

Tropomyosin blocks the binding sites on actin filaments, preventing muscle contraction when calcium ions are not present.

Front

What is the significance of the T tubule in muscle contraction?

Back

T tubules allow the rapid transmission of action potentials into the muscle fiber, facilitating synchronized contraction.

Front

What is the role of calcium ions in muscle contraction?

Back

Calcium ions bind to troponin, causing a conformational change that allows myosin to bind to actin.