Muscle Basics
Approximately how many muscles does the human body have?
640
What connects muscle to bone and stays more stable during movement?
Origin
Which muscle is on the front of the lower leg and lifts the foot upward?
Tibialis Anterior
What is the ability of muscle to respond to a stimulus called?
Excitability (irritability)
What attachment point moves when the muscle contracts?
Insertion
Which large chest muscle helps move the arm forward?
Pectoralis Major
What property allows a muscle to shorten and create movement?
Contractibility
What is the connective tissue that surrounds and supports muscles?
Fascia
Which abdominal “six-pack” muscle runs straight down the stomach?
Rectus Abdominis
What property allows a muscle to stretch without damage?
Extensibility
Name ONE function of muscles.
movement, posture, heat production, stabilize joints, move substances through body
Which large calf muscle is visible and used for jumping and sprinting?
Gastrocnemius
What property allows a muscle to return to its original shape after stretching?
Elasticity
Which function helps maintain body position while standing?
Posture
Which shoulder muscle is responsible for lifting the arm out to the side (abduction)?
Deltoid