AT Exam Review Section 1 Flashcards
phosphagen system
provides ATP primarily for short-term, high intensity activities (eg resistance training & sprinting) & is active at the start of all exercise regardless of intensity
aerobic respiration system (oxaditive)
primary source of ATP at rest & during low-intensity activities, uses primarily carbohydrates & fats as substrates
reciprocal inhibition
relaxation that occurs in the muscle opposing the muscle experiencing the increased tension
diarthrotic joint (synovial)
united by a joint capsule
contain synovial fluid
ginglymus joint (hinge)
permit flexion & extension only
occur in 1 plane (uniaxial)
elbow joint
sellar joint (saddle)
permit abduction & adduction, Flexion & extension & circumduction possible
occur in 2 planes (biaxial joint)
thumb (base)
agonist muscle
muscle that contracts
antagonist muscle
action opposite of agonist
muscle that lengthens
synergist muscle
assists agonist
increases movement efficiency
prevents unnecessary movement
fixators muscle
stops unwanted action at fixed attachment
point of a muscle
neutralizers muscle
stops unwanted action at mobile attachment point of a muscle
sarcolemma
the plasma membrane of a muscle fiber; formerly, the delicate connective tissue of the endomysium was include under this term by some
myofibril
one of the fine longitudinal fibrils occuring in a skeletal or cardiac muscle fiber comprising many regularly overlapped untramicroscopic thick and thin myofilaments
flat muscle
thin & broad
example - rectus abdominis
fusiform (spindle) muscle
spindle shaped
example - brachioradialis
triangular radiate muscle
fan shaped
example - trapezius
strap muscle
long parallel manner
example - sartorius
sphincter (circular) muscle
around a body opneing
example - orbicularis occuli
spiral muscle
arranged aroud long axis
example - latissimus dorsi
unipennate muscle
diagnonally arranged fibers from a central tendon on one side only
example - brachialis
bipennate muscle
diagonally arranged fibers from a central tendon on both sides
example - biceps femoris
multipennate muscle
diagonally arranged fibers from multiple tendon
example - deltoid
contractility
the ability or properly of a substance, expecially of muscle, of shortening, or becoming reduced in size, or developing increased tension
first class lever
fulcrum is between the resistance & applied force
example in body - neck extension
example outside body - see saw
second class level
resistance is between the fulcrum and applied force
very efficient lever system
example in body - standing heel raise
example outside body - wheel barrow
third class lever
applied force is between the fulcrum & resistance
very inefficient system
example in body - elbow flexion
example outside body - swinging door
cubitus recurvatum
elbow extension beyond 0 degrees
carrying angle of elbow
about 15 degrees
astrocytes
one of the large neuroglia cells of nervous tissue
oligodendroglia
one of the four types of glia cells (the other three being macroglia or astrocytes, ependymal cells, and microglia) that, together with nerve cells, compose the tissue of the central nervous system. These cells are characterized by variable numbers of veillike or sheetlike processes that each wrapped around individual axons to form the myelin sheath or nerve fibers in the central nervous system: forms myelin in the central nervous system, & accordingly are more numerous in white matter than in gray matter
coronal plane (frontal or lateral)
a vertical plane, extending from side to side, dividing the body into an anterior & a posterior portion