Unit 5 EXAM: Muscular System

Front

What are the main functions of the muscular system?

Back

1. Movement 2. Posture 3. Heat production 4. Storage of minerals

Front

Which protein forms the thick myofibril filament in a sarcomere?

Back

Myosin

Front

What is the term for the movement of the foot so that the sole faces medially?

Back

Inversion

Front

Which muscle is known as the 'calf muscle'?

Back

Gastrocnemius

Front

What is the prime mover muscle during the flexion of the leg?

Back

Hamstring

Front

What is the role of actin in muscle contraction?

Back

Actin is a thin filament that interacts with myosin to facilitate muscle contraction.

Front

Define 'sarcomere'.

Back

The sarcomere is the basic contractile unit of muscle tissue, composed of actin and myosin filaments.

Front

What is the difference between voluntary and involuntary muscles?

Back

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

Front

What is the function of the quadriceps muscle group?

Back

The quadriceps are responsible for extending the knee and are crucial for walking, running, and jumping.

Front

What is the role of the hamstring muscle group?

Back

The hamstrings are responsible for flexing the knee and extending the hip.