Flashcards in quiz 4 Deck (31):
the outermost layer of connective tissue of a muscle is the ____?
the thick myofibril filament of a sarcomere is composed of the protein ___?
the muscle primarily responsible for an action is the ____?
the neuron and the muscle fibers it innervates make up the ___?
the functional contractile unit of a muscle fiber is the _____?
the action of a particular muscle is always the same
a synergistic muscle contraction assists the agonist
the plasma membrane of a muscle fiber is called the sarcolemma
protein that comprises part of the thin filament with actin
cytoplasm of a muscle fiber
connective tissue located between adjacent muscles
layer of connective tissue that separates a muscle into small bundle called fascicle
plasma membrane of a muscle fiber
layer of connective tissue that surrounds a skeletal muscle
unit of alternating light and dark striations between Z discs
layer of connective tissue that surrounds an individual muscle fiber
cellular organelle in muscle fiber corresponding to the endoplasmic reticulum
cordlike part that attaches a muscle to a bone
protein found within thick filament
small bundle of muscle fibers within a muscle
the ____ of a muscle is attached to a more fixed location
the ______ of a muscle is attached to a more movable location
a muscle responsible for most of an action is called an
against (prime mover)
assisting muscles of an agonist are called
antagonists are muscles that resist the actions of ____ and cause movement in the opposite direction
when the forearm is extended at the elbow joint, the ______ muscle acts as the agonist
when the brachialis acts as the agonist, the ___ muscle assists as a synergist
a _______ is a synergistic muscle that will stabilize a joint when another contracting muscle exerts a force on something else
electrical activity of muscles and the action potential propagated along the sacrolemma
when there is demand to stimulate more motor units within a muscle to help it contract as a load increases
motor unit recruitment