Muscles II Flashcard

Front

What is Acetylcholine?

Back

A neurotransmitter that stimulates skeletal muscle.

Front

What is a sarcomere?

Back

The contractile unit between two Z discs.

Front

What type of muscle tissue is voluntary?

Back

Skeletal muscle.

Front

What protein composes thick filaments?

Back

Myosin protein.

Front

What type of muscle cells are involuntary?

Back

Smooth muscle cells.

Front

What is the function of myosin in muscle contraction?

Back

Myosin interacts with actin to facilitate muscle contraction.

Front

What are the two main types of muscle tissue?

Back

Skeletal muscle and smooth muscle.

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.

Front

What is the difference between striated and non-striated muscle?

Back

Striated muscle (skeletal and cardiac) has a banded appearance, while non-striated muscle (smooth) does not.

Front

What is the role of the Z disc in a sarcomere?

Back

The Z disc anchors the thin filaments and defines the boundaries of a sarcomere.