Muscle Test

Front

What is the A band in muscle contraction?

Back

The A band is the dark band in a sarcomere that contains the thick filaments (myosin) and remains the same size during muscle contraction.

Front

What are prime movers (agonists)?

Back

Prime movers, or agonists, are muscles that are most responsible for producing a certain movement.

Front

What is a myofibril?

Back

A myofibril is a long, thread-like structure found in muscle fibers, composed of repeating units called sarcomeres.

Front

What is muscular dystrophy?

Back

Muscular dystrophy is an inherited disorder that causes progressive weakness and degeneration of the skeletal muscles.

Front

What neurotransmitter is essential for muscle contraction?

Back

Acetylcholine is the neurotransmitter that is needed for muscle contraction to begin.

Front

What is the role of calcium in muscle contraction?

Back

Calcium ions are released from the sarcoplasmic reticulum and bind to troponin, allowing myosin to bind to actin and initiate contraction.

Front

What is the I band in muscle contraction?

Back

The I band is the light band in a sarcomere that contains only thin filaments (actin) and shortens during muscle contraction.

Front

What is the function of tendons?

Back

Tendons connect muscles to bones, transmitting the force generated by muscle contraction to produce movement.

Front

What is the role of the sarcomere?

Back

The sarcomere is the basic contractile unit of muscle tissue, responsible for muscle contraction and relaxation.

Front

What is the difference between a strain and a sprain?

Back

A strain is an injury to a muscle or tendon, while a sprain is an injury to a ligament.