Characteristics and Functions of Muscles Quiz

Voluntary control allows conscious movement of skeletal muscles.

Flexibility refers to a muscle's capacity to elongate without causing harm or injury.

ATP provides the energy needed for muscle contractions through its hydrolysis.

GABA is a neurotransmitter that induces muscle relaxation by inhibiting nerve signals.

Creatine phosphate serves as a rapid source of energy for high-intensity muscle contractions, replenishing ATP.

Cardiac muscles contract to pump blood throughout the circulatory system.

Actin is a key protein that forms the thin filaments in muscle fibers, facilitating contraction.

Fast-twitch fibers generate rapid and forceful contractions, suitable for intense activities.

The neuromuscular junction is where nerve signals communicate with muscle fibers.

Eccentric contraction involves muscle lengthening while under tension, often during controlled movement.

Satellite cells play a crucial role in repairing and regenerating damaged muscle fibers.

Sarcoplasmic reticulum stores and releases calcium ions, crucial for muscle contraction.

Acetylcholine transmits nerve signals to muscles, triggering contractions.

Growth hormone promotes muscle growth and the synthesis of proteins in muscle cells.

Concentric contraction is the phase where muscles generate maximal force during shortening.

The biceps brachii muscle is responsible for flexing the forearm at the elbow joint.

Perimysium is the connective tissue that envelops a bundle of muscle fibers within a muscle.