Muscular System Test

Front

What is the primary function of tropomyosin in muscle tissue?

Back

Blocks myosin-binding sites during muscle relaxation

Front

What happens when calcium ions bind to troponin?

Back

Tropomyosin moves away from myosin-binding sites

Front

Which characteristic of muscle tissue allows it to respond to neural stimuli?

Back

Excitability

Front

What is the function of T-tubules in muscle fibers?

Back

Conduct impulses deep into the muscle fiber

Front

What is the primary neurotransmitter used at the neuromuscular junction?

Back

Acetylcholine (ACh)

Front

What is the role of the sarcoplasmic reticulum?

Back

Stores and releases calcium ions

Front

What type of myofilament is myosin?

Back

Thick filament

Front

What is the function of myosin heads?

Back

Bind to actin

Front

The H zone of a sarcomere contains:

Back

Only thick (myosin) filaments

Front

What property of muscle tissue allows it to be stretched without damage?

Back

Extensibility