The body's three engines
Levers, lines, and brain signals
Fueling the fire
Weird, wild, and ancient muscles
YOUR GOAL
Master of The human muscular system
artiteacher Levers, lines, and brain signals
Muscles only pull, they never push away, Working in pairs to get us through the day.
artiteacher To move joints in two directions, muscles must work in coordinated, opposing teams.
artiteacher Tendons are incredibly strong, fibrous bands of connective tissue that anchor muscles to bones.
artiteacher Tug the contracting muscles to learn how opposing pairs pull your bones.
Achilles tendon power: The Achilles tendon can withstand loads up to twelve times a person's body weight during running.
A functional unit consisting of a motor neuron and all the muscle fibers it innervates. Sir Charles Sherrington first introduced this concept of neuromuscular control in 1925.
What type of physical lever system is most common in the human body, where the muscle force is applied between the joint and the load?
Because muscles can only pull and never push, how do they typically work to move limbs?
Which chemical neurotransmitter is released by motor neurons to signal a muscle to contract?
Which muscle acts as the opposing partner (antagonist) when the biceps muscle contracts to bend the elbow?
What tough, fibrous connective tissue attaches skeletal muscles directly to bones?
Which tendon in the human body is the thickest and strongest, capable of supporting immense loads?
What is the name of the specialized connection point where a motor neuron meets a muscle fiber?