Muscle Basics
This is the cell membrane of a muscle fiber.
What is the sarcolemma?
This is the opposing muscle that relaxes to allow movement.
What is the antagonist?
This thick myofilament helps muscles contract.
What is myosin?
This is the primary neurotransmitter for muscle contraction.
What is acetylcholine?
These muscle fibers are fatigue-resistant and red.
What are slow twitch fibers?
This term refers to a muscle’s ability to shorten.
What is contractility?
Muscles that assist the prime mover are called this.
What are synergists?
This is a broad, flat tendon.
What is an aponeurosis?
This is a single motor neuron and all fibers it innervates.
What is a motor unit?
These muscle fibers are fast and fatigue quickly.
What are fast twitch fibers?
This term refers to a muscle’s ability to lengthen.
What is extensibility?
This is the muscle attachment on the more movable bone.
What is the insertion?
This band of connective tissue is found around joints.
What is a retinaculum?
This is the process of activating more motor units when needed.
What is recruitment?
This is the reason we breathe heavily after intense exercise.
What is oxygen debt?
This is the fascia that surrounds an entire muscle.
What is the epimysium?
This muscle type remains the same length but builds tension.
What is isometric contraction?
This fascial term refers to muscle and its connective tissue.
What is myofascial?
This sensory receptor allows stretching by inhibiting contraction.
What is the Golgi tendon organ?
This muscle can act as an extensor if lumbar lordosis is exaggerated.
What is the psoas major?
This is the contractile unit of a muscle.
What is a sarcomere?
This process explains how muscle contraction happens at the microscopic level.
What is the sliding filament mechanism?
This neuromuscular structure receives signals from a neuron.
What is the motor end plate?
This receptor stimulates contraction in response to stretch.
What is the muscle spindle?
This structure connects the psoas major to the femur.
What is the lesser trochanter?