Muscular System Flashcards
What is the primary function of the muscular system?
Function: To enable movement, maintain posture, and produce heat.
What are the three types of muscle tissue?
Skeletal Muscle, Cardiac Muscle, and Smooth Muscle.
Which type of muscle is under voluntary control?
Skeletal Muscle – Muscles attached to bones that you can control consciously.
Where is cardiac muscle found?
Heart – Cardiac muscle is only found in the walls of the heart and works involuntarily.
What type of muscle controls the movement of internal organs?
Smooth Muscle – Found in walls of organs like the stomach, intestines, and blood vessels, and works involuntarily.
What is the connective tissue that attaches muscle to bone?
Tendon – A strong, fibrous tissue connecting muscles to bones.
What is the process by which muscles shorten to produce movement?
Muscle Contraction – The shortening and tightening of muscle fibers to generate movement.
What is the basic unit of a muscle fiber responsible for contraction?
Sarcomere – The smallest functional unit of a muscle fiber, made of actin and myosin filaments.
What energy molecule is required for muscle contractions?
ATP (Adenosine Triphosphate) – Provides the energy needed for muscles to contract.
What is the condition called when muscles lose mass and strength?
Muscle Atrophy – The decrease in muscle mass and strength due to lack of use or disease.
