Anatomy & Physiology Flashcards

What is the primary function of the skeletal system?

Answer: To protect vital organs and provide support.

The skeletal system provides the fundamental framework for the human body, offering structural support that allows for posture and movement. A primary function is to protect vital internal organs, such as the brain, heart, and lungs, from external damage. Additionally, bones store minerals and are responsible for producing blood cells.

What is the role of ligaments in the musculoskeletal system?

Answer: To connect bones to bones and provide joint stability.

Ligaments are strong, fibrous bands of connective tissue that primarily connect bones to other bones, forming joints. Their crucial role is to provide stability to these joints, preventing excessive or unnatural movements that could lead to injury. They act as natural straps, holding the skeletal structure together while allowing for controlled motion.

What does the term 'range of motion' (ROM) refer to?

Answer: The ability of joints to move through their full motion range.

Range of Motion (ROM) refers to the full extent of movement that a joint can achieve, from its maximum extension to its maximum flexion. It is a critical indicator of joint health and flexibility, representing the complete arc of motion possible without pain or restriction. Assessing ROM helps identify any limitations or hypermobility in a joint.

What is the function of tendons in the body?

Answer: To connect muscles to bones and transmit force.

Tendons are tough, flexible cords of fibrous connective tissue that serve as the vital link between muscles and bones. When a muscle contracts, tendons transmit the force generated by the muscle to the bones, thereby causing movement at a joint. They are indispensable for all forms of physical activity and locomotion.

What is the role of cartilage in joints?

Answer: To reduce friction and absorb shock in joints.

Cartilage is a smooth, elastic connective tissue found at the ends of bones within joints. Its primary functions are to reduce friction between bones, allowing them to glide smoothly over each other during movement, and to act as a shock absorber. This cushioning effect protects the joint from impact and wear, preventing bone-on-bone rubbing.

How does the nervous system interact with the musculoskeletal system?

Answer: It sends signals to muscles for movement and coordination.

The nervous system acts as the body's control center, directly orchestrating the musculoskeletal system. It sends electrical signals, via motor neurons, from the brain and spinal cord to muscles, instructing them to contract or relax. This intricate communication is essential for all voluntary and involuntary movements, coordination, and maintaining balance.

What is the purpose of the lumbar spine?

Answer: To support the body’s weight and allow flexibility.

The lumbar spine, located in the lower back, consists of five large vertebrae specifically designed to support the majority of the upper body's weight. Its robust structure provides essential stability, while the intervertebral discs allow for significant flexibility and movement. This enables actions like bending, twisting, and lifting, making it crucial for overall mobility.

What is the primary function of the cardiovascular system in relation to muscles?

Answer: To deliver oxygen and nutrients while removing waste products.

The cardiovascular system, comprising the heart, blood vessels, and blood, is crucial for muscle function. It efficiently delivers oxygen and essential nutrients, such as glucose, to working muscles to fuel their activity and growth. Simultaneously, it removes metabolic waste products like carbon dioxide and lactic acid, preventing fatigue and maintaining optimal muscle health.

What is the primary role of the respiratory system during physical activity?

Answer: To transport oxygen and remove carbon dioxide.

During physical activity, muscles require increased oxygen for energy production and generate more carbon dioxide as a waste product. The respiratory system's primary role is to facilitate this exchange: it takes in oxygen from the air, transfers it to the blood for delivery to muscles, and removes carbon dioxide from the blood to be exhaled from the body.