Pre_Post Test Muscle tissue

Front

What is the M line in muscle tissue?

Back

The M line is the center of the A band in the sarcomere, where thick filaments are anchored.

Front

What is the period of contraction in muscle physiology?

Back

The period of contraction is the phase from the onset of muscle contraction to its peak tension development.

Front

What happens after acetylcholine is released into the synaptic cleft?

Back

Acetylcholine binds to muscle cell receptors, initiating muscle contraction.

Front

What occurs to the zone of overlap during skeletal muscle contraction?

Back

The zone of overlap gets larger as the muscle fibers contract.

Front

What is a fascicle in muscle anatomy?

Back

A fascicle is a bundle of muscle fibers.

Front

What is the role of acetylcholinesterase in muscle contraction?

Back

Acetylcholinesterase breaks down acetylcholine in the synaptic cleft, stopping the signal for contraction.

Front

What are the H and I bands in a sarcomere?

Back

The H band is the region of the A band where there are only thick filaments, while the I band contains only thin filaments.

Front

What is the function of tropomyosin in muscle contraction?

Back

Tropomyosin blocks the active sites on actin filaments, preventing contraction until calcium ions bind to troponin.

Front

What is the significance of the Z lines in muscle tissue?

Back

Z lines mark the boundaries of a sarcomere and anchor the thin filaments.

Front

What is muscle tone?

Back

Muscle tone is the continuous and passive partial contraction of the muscles, which helps maintain posture.