Exam 2 Items from Quizes
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Epiphysis
the site of secondary ossification during endochondral bone development is in the _____ of a long bone.
Flat Bones
occipital and temporal bones are good examples of:
appendicular skeleton parts
pectoral girdle, scapula, clavicle, hip NOT PART OF IT IS STERNUM
lamellae
layers of bone are called
sternum is part of what skeleton
part of the axial skeleton
transverse
occurs straight across the long axis of the bone
function of skeletal system important in a car accident
protection of internal organs
Calcitonin and parathyroid hormone
pair of hormones that has actions that oppose each other (with respect to their direct effects on bone tissue)
trabeculae
only found in spongy bone
atrophy
decrease in the number of myofibrils and sacromers in muscle
abductor
moves the bone away from the midline
functions of skeletal muscle
movement, maintenance of posture, heat generation (NOT HEART CONTRACTION)
muscle whose primary movement is performing extension
rectus femoris
what does extensibility in muscles mean
ability to lengthen
used to produce rapid, forceful contractions to make quick powerful movements
fast glycolyctic (FG) fibers
myosin head contains binding sites for what two molecules
actin and ATP
which one or two muscle types contain myofibrils composed of sarcomeres
skeletal and cardiac muscle
T/F if calcium can no longer bind to the troponin of the thin filaments then myosin-binding sites on actin are blocked
true
thalamus
gateway to the cerebral cortex
tracts of the nervous system are
bundles of axons (fibers) located in the central nervous system
what event is occurring during the upswing of the action potential curve (from -55 mV to 30 mV)
rapid Na+ entry depolarizes cell
what innervates the anterior leg
lumbar plexus
motor neurons carry nervous impulses from
the CNS to the PNS
olfactory nerve (I)
cranial nerve responsible for the sense of smell