Muscles and Movement

Front

What types of movement are permitted by the elbow joint?

Back

Flexion and extension.

Front

What is the role of myosin filaments in muscle contraction?

Back

Myosin filaments are thick filaments that interact with actin to facilitate muscle contraction.

Front

What are the two main types of muscle filaments?

Back

Thick filaments (myosin) and thin filaments (actin).

Front

What is a sarcomere?

Back

The basic contractile unit of muscle tissue, defined as the segment between two Z lines.

Front

What is the function of the triceps muscle?

Back

The triceps muscle is responsible for the extension of the elbow joint.

Front

What is the significance of ATP in muscle contraction?

Back

ATP provides the energy required for muscle contraction and relaxation.

Front

What is the sliding filament theory?

Back

The theory that explains muscle contraction as the sliding of actin filaments over myosin filaments.

Front

What is the role of the sarcoplasmic reticulum in muscle cells?

Back

The sarcoplasmic reticulum stores and releases calcium ions, which are essential for muscle contraction.

Front

What is the difference between voluntary and involuntary muscles?

Back

Voluntary muscles are controlled consciously (e.g., skeletal muscles), while involuntary muscles operate automatically (e.g., cardiac and smooth muscles).

Front

What is the function of actin filaments in muscle contraction?

Back

Actin filaments provide a track for myosin heads to pull on during muscle contraction.