Muscular System

Front

What is the muscular system?

Back

The muscular system is a group of tissues in the body that enables movement through contraction and relaxation of muscles.

Front

What are the three types of muscle tissue?

Back

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

Front

What is the function of skeletal muscle?

Back

Skeletal muscle is responsible for voluntary movements and is attached to bones.

Front

What is the sliding filament theory?

Back

The sliding filament theory explains how muscles contract by the sliding of thin filaments (actin) over thick filaments (myosin) within the muscle fibers.

Front

What role do myosin heads play in muscle contraction?

Back

Myosin heads form cross bridges with actin filaments and pull them, causing muscle contraction.

Front

What is the role of neurotransmitters in muscle contraction?

Back

Neurotransmitters are released from the axon terminals of motor neurons and stimulate muscle fibers to contract.

Front

What is abduction in terms of muscle movement?

Back

Abduction is the movement of a limb away from the midline of the body.

Front

What is adduction in terms of muscle movement?

Back

Adduction is the movement of a limb toward the midline of the body, opposite to abduction.

Front

What is the epimysium?

Back

The epimysium is a connective tissue sheath that surrounds the entire muscle.

Front

What is the function of smooth muscle?

Back

Smooth muscle is responsible for involuntary movements in internal organs, such as digestion and blood vessel regulation.