ch0.2 - study book vocabulary Flashcards
smooth muscle functions?
one nucleus/no striations, comprising walls of blood vessels/organs of urinary/digestive/respiratory/reproductive tracts, also for peristalsis (moving food through digestive tract)
bioenergetic diff. between type I and type II?
type I = low myosin ATPase, slower calcium handling, reduced glycolytic capacity, large mitochondria
difference between IIa and IIb fibers?
IIa = moderate aerobic/anaerobic capacity, fast-oxidative+glycolytic, high myosin ATPase activity, greater number of capillaries than IIx fibers. IIb = fast glycolytic, less capacity for aerobic energy therefore more fatigable
number of skeletal muscles in the body?
over 500
what are the twelve muscle groups by function?
(1) facial expression (2) mastication (3) head/vertebral column movement (4) pectoral girdle movement (5) arm movement (6) forearm movement (7) hand movement (8) abdominal wall movement (9) pelvic outlet movement (10) thigh movement (11) leg movement (12) foot movement
muscles responsible for arm/shoulder flexion?
pectoralis major, anterior delt, coracobrachialis
muscles responsible for arm/shoulder extension?
teres major, lat dorsi, posterior delts
muscles responsible for arm abduction?
supraspinatus and deltoid muscles
muscles responsible for arm rotation?
subscapularis, infraspinatus, teres minor
muscles responsible for elbow flexion?
biceps, brachialis, bracioradialis
muscles responsible for elbow/forearm extension?
triceps, anconeus
muscles responsible for forearm rotation?
supinator, pronator teres, and pronator quadratus
muscles responsible for wrist/hand flexion?
flexor carpi radialis, flexor carpi ulnaris, palmaris longus, flexor digitorum profundus, flexor digitorum superficialis
muscles responsible for knee flexion?
bicep femoris, semitendinosus, semimembranosus (the hamstring muscles) and sartorius
muscles responsible for knee extension?
quadriceps femoris (rectus femoris, vastus lateralis, vastus medialis, and vastus intermedius)
muscles responsible for dorsiflexion?
fibularis tertius, extensor digitorum longus, extensor hallucis longus, and tibialis anterior
muscles responsible for ankle plantarflexion?
plantaris, flexor digitorum longus, gastrocnemius, soleus
superior (cranial)?
near/toward upper part of body, toward head
antonym of cranial?
caudal (inferior)
ventral/dorsal are other words for what?
anterior/posterior
medial?
near body’s midline
lateral - relationship to medial?
away from body’s midline
bilateral?
on either side of central axis or midline
ipsilateral?
on or affecting the same side of the body
contralateral?
on or affecting opposite sides of the body
intermediate?
located between two structures – e.g. one medial and one lateral, or one superior/inferior
proximal?
location of the origin or point of attachment toward the trunk and away from appendages
distal?
location of origin or point of attachment away from the body
superficial (external)
near the outside or surface of an object or body
deep (internal)
inside, away from surface or body
axial
associated with the center of the body (head/neck/trunk = axial skeleton)
appendicular
body’s appendages (legs/arms)
abduct
movement away from body’s midline
adduct
movement toward the body’s midline
in terms of orientation/direction, where is the clavicle in relation to the iliac crest?
superior to
in terms of orientation/direction, where is the talus in relation to the patella?
talus is inferior to patella
in terms of orientation/direction, where is the sternum in relation to the spine?
sternum is anterior to the spine
in terms of orientation/direction, where is the spine in relation to the sternum?
spine is posterior to the sternum
in terms of orientation/direction, where is nose in relation to the ears?
nose is medial to the ears
in terms of orientation/direction, where are the ears in relation to the nose?
ears are lateral to nose
what are the body’s bilateral structures?
legs, eyes, lungs
what are the body’s isolateral structures?
hands and feet
what is an example of contralateral action?
a stroke on the right side of the brain may affect the function of the left arm
a stroke on the left side of the brain may affect the movement of the right leg – this is an example of what?
contralateral effect
in terms of orientation/direction, where is the knee relative to the hip?
intermediate
in terms of orientation/direction, where is the thigh relative to the ankle?
proximal
in terms of orientation/direction, where is the ankle relative to the knee?
distal
the first phase of jumping jacks – what kind of movement is this?
abduct
the second phase of jumping jacks – what kind of movement is this?
adduct
what is the action of the ilicostalis (lateral), longissimus (intermediate), and spinalis (medial)?
prime mover of back extension; each side consists of three columns
how do the origin and insertion differ in mobility?
insertion is movable, origin is immovable
where is the origin and insertion of the trapezius muscle?
ORIGIN: occipital bone, ligamentum nuchae, and spines of C7 and all thoracic vertebrae INSERTION: continuous insertion along acromion and spine of scapula and lateral third of clavicle
what is the origin and insertion of the rhomboids?
ORIGIN: spinous processes (T7-T5), INSERTION: medial border of scapula
what is the action of the rhomboid major?
retracts, elevates, and rotates scapula
what is the action of the rhomboid minor?
retracts and elevates scapula
what is the action of the pectoralis minor?
abducts scapula pulling it forward and downward; draws rib cage superiorly (raises ribs)
what is the origin and insertion of the pectoralis minor?
ORIGIN: anterior surface of ribs 3-5, INSERTION: coracoid process of scapula
what is the action of the pectoralis major?
prime mover of arm flexion; rotates arm medially, adducts humerous; pulls arm across chest
what is the origin and insertion of the pectoralis major?
ORIGIN: medial 1/2 of clavicle, sternum, and costal cartilages of ribs one through six INSERTION: greater tubercle of humerus
what is the action of the teres major?
posteromedially extends, medially rotates, and adducts humerus; synergist of latissimus dorsi
what is the origin and insertion of the teres major?
ORIGIN: posterior surface of scapula at inferior angle INSERTION: intertubercular groove of humerus
what is the action of the latissimus dorsi?
prime mover of arm extension; arm adductor; medially rotates humerus at shoulder
what is the origin and insertion of the latissimus dorsi?
ORIGIN: spines of lower six thoracic vertebrae, lumbar vertebrae, lower three to four ribs, and iliac crest INSERTION: intertubercular groove of humerus
what is the action of the deltoids?
prime mover of arm abduction (at shoulder); extends and flexes arm
what is the origin and insertion of the deltoids?
ORIGIN: spine of scapula, acromion, and lateral 1/3 of clavicle INSERTION: deltoid tuberosity of humerus
what muscles comprise the rotator cuff?
supraspinatus, infraspinatus, teres minor, subscapularis
what is the action of the rotator cuff (supraspinatus/infraspinatus/teres minor/subscapularis)?
medially or laterally rotate arm at shoulder; supraspinatus assists abduction; stabilizes shoulder joint, helping to prevent downward dislocation of humerous
what is the action of the biceps brachii?
flexes elbow joint and supinates forearm and hand
what is the origin and insertion of the biceps brachii?
ORIGIN: short head – caracoid process of scapula, long head – tubercle above glenoid cavity of scapula INSERTION: radial tuberosity of radius
what is the action of the brachialis?
flexes elbow
what is the origin and insertion of the brachialis?
ORIGIN: anterior, distal 1/2 of humerus INSERTION: coronoid process of ulna
what is the action of the brachioradialis?
flexes forearm at elbow
what is the origin and insertion of the brachioradialis?
ORIGIN: lateral supercondylar ridge at distal end of humerus, INSERTION: base of styloid process at radius
what is the action of the triceps brachii?
extends forearm at elbow
what is the origin and insertion of the triceps brachii?
ORIGIN: long head – infraglenoid tubercle of scapula, lateral head – posterior humerus above radial groove, medial head – posterior humerus below INSERTION: all three heads – olecranon process of ulna
what is the action of the external obliques?
tenses abdominal wall and compresses abdominal contents
what is the origin and insertion of the external obliques?
ORIGIN: outer surfaces of lower eight ribs INSERTION: outer lip of iliac crest and linea alba
what is the action of the internal obliques?
tenses abdominal wall and compresses abdominal contents
what is the origin and insertion of the internal obliques?
ORIGIN: lumbar fascia, iliac crest, and inguinal ligament INSERTION: cartilages of lower ribs, linea alba, and crest of pubis
what is the action of the transverse abdominis?
compresses abdominal components
what is the origin and insertion of the transverse abdominis?
ORIGIN: inguinal ligament, lumbar fascia, cartilages of the last six ribs, iliac crest INSERTION: linea alba and crest of pubis
what is the action of the rectus abdominis?
flexes and rotates lumbar region of vertebral column; fixes and depresses ribs, stabilizes pelvis when walking; tenses abdominal wall, increases intra-abdominal pressure
what is the origin and insertion of the rectus abdominis?
ORIGIN: crest of pubis and symphysis pubis INSERTION: xiphoid process and costal cartilages of ribs five through seven
what is the origin and insertion of the psoas major (iliopsoas)?
ORIGIN: lumbar intevertebral discs, bodies and transverse processes of lumbar vertebrae INSERTION: femur on and immediately below lesser trochanter of femur via ilipsoas tendon
what is the action of the iliacus (iliopsoas)?
prime mover for flexing thigh or for flexing trunk on thigh during a bow
what is the origin and insertion of the iliacus (iliopsoas)?
ORIGIN: iliac fossa and crest, INSERTION: femur on and immediately below lesser trochanter of femur via iliopsoas tendon
what is the action of the gluteus maximus?
major extensor of thigh; generally inactive during walking and standing, laterally rotates and abducts thigh
what is the origin and insertion of the gluteus maximus?
ORIGIN: sacrum, coccyx, and posterior surface of ilium INSERTION: posterior surface of femur and fascia of thigh
what is the action of the piriformis?
abducts and rotates thigh laterally, stabilizes hip joint
what is the origin and insertion of the piriformis?
ORIGIN: anterior surface of sacrum INSERTION: superior border of greater trochanter of femur
what is the action of the hamstring group (bicep femoris, semitendinosus, semimembranosous)?
extends thigh and flexes knee, laterally or medially rotates leg, especially when knee is flexed
what is the origin and insertion of the hamstring group (bicep femoris, semitendinosus, semimembranosus)?
ORIGIN: ischial tuberosity INSERTION: varies on muscle
what is the action of the quadricep group (vastus lateralis, vastus medialis, vastus intermedius, rectus femoris)?
extends and stabilizes knee
what is the origin and insertion of the quadricep group (vastus lateralis, vastus medialis, vastus intermedius, rectus femoris)?
ORIGIN: varies on specific muscle INSERTION: patellar ligament to tibial tuberosity
what is the action of the gastrocnemius?
plantar flexion of foot, flexes knee
what is the origin and insertion of the gastrocnemius?
ORIGIN: lateral and medial condolytes of femur INSERTION: posterior surface of calcaneus
what is the action of the soleus?
plantar flexion of foot
what is the origin and insertion of the soleus?
ORIGIN: head and shaft of fibula and posterior surface of tibia INSERTION: posterior surface of calcaneus
of the actin/myosin combo, which is responsible for splitting ATP?
myosin
how is the distance of Z-lines in the sarcomere reduced?
by actin/myosin sliding past each other, causing the overlap of filament to increase
when is minimal calcium in the myofibril?
under resting conditions
what are the phases of sliding filament theory?
resting phase, excitation-coupling phase, recharge phase, relaxation phase
why are isometric muscle contractions not able to contract concentrically?
they result from when the resistance force is greater than that generated by the muscle
what does a motor neuron consist of?
motor neuron (cell body), axon, dendrites
shot put is an example of what kind of body movement?
elbow extension
tricep push down is an example of what kind of body movement?
elbow extension