Muscular system Anatomy and physiology review

Front

What is the primary function of the muscular system?

Back

The primary function of the muscular system is to facilitate movement of the body, maintain posture, and produce heat.

Front

What are the three types of muscle tissue?

Back

The three types of muscle tissue are skeletal, cardiac, and smooth.

Tags

NGSS.HS-LS1-1

NGSS.HS-LS1-4

Front

What is the role of myosin in muscle contraction?

Back

Myosin forms crossbridges with actin and pulls on the thin filaments during muscle contraction.

Front

Which muscle type is responsible for voluntary movements?

Back

Skeletal muscle is responsible for voluntary movements.

Front

What is the difference between voluntary and involuntary muscles?

Back

Voluntary muscles are under conscious control (e.g., skeletal muscles), while involuntary muscles operate without conscious control (e.g., cardiac and smooth muscles).

Front

What is a sarcomere?

Back

A sarcomere is the basic functional unit of a muscle fiber, consisting of overlapping thick (myosin) and thin (actin) filaments.

Front

What is the role of calcium in muscle contraction?

Back

Calcium ions bind to troponin, causing a conformational change that allows myosin to bind to actin.

Front

What is the function of ATP in muscle contraction?

Back

ATP provides the energy required for muscle contraction and relaxation.

Front

What are the characteristics of smooth muscle?

Back

Smooth muscle is involuntary, non-striated, and found in the walls of hollow organs.

Front

What is the function of the triceps muscle?

Back

The triceps muscle is responsible for extending the elbow joint.