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32 terms

lab quiz 9

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linea alba
band of tough connective tissue in the midline of the anterior abdominal wall serves as a muscle attachment
rectus abdominus
this muscle spans from the ribs and sternum to the pubic bones
transverse abdominus
froms the 3rd layer (deepest layer) of the abdominal wall muscles
external oblique
this muscle tenses the abdominal wall and compresses abdominal contents
rectus abdominus
this muscles tenses the abdominal wall and compresses abdominal contents and flexes vertebral column
errector spine group
the ilicostalis, longissimus, and spinalis muscles form this
biceps femoris
flexes leg at the knee
fibularis longus
plantar flexion and eversion of foot
fibularis tertius
dorsiflexion and eversion of foot
gluteus medius
abducts thigh and rotates it medially
gracilis
adducts thigh
psoas major and iliacus
fllexes thigh at the hip
quadriceps femoris group
extends leg at the knee
sartorius
abducts thigh and rotates it laterally
tibialis anterior
dorsiflexion and inversion of foot
tibialis posteriot
plantar flexion and inversion of foot
neurilemma
sheath of schwann cell containinf cytoplasm and nucleus that encloses myelin
nissl bodies
(chromatophilic substance), corresponds to rough endoplasmic reticulum in other cells
neurofibrils
network of fine threads extending into nerve fiber
myelin sheath
substance of schwann cell composed of lipoprotein that insulates axons and increases impulse speed
dendrite
neuron process with many branches that cinducts an impulse toward the cell
collateral
branch of an axon
astrocyte
star-shaped neuroglia between neurons and blood vessels
axon
nerve fiber arising fom a slight elevation of the cell body that conducts an impulse away from the cell body
interneuron
transmitts impulse from sensory to motor neuron within central nervous system
motor neuron
transmitts impulse out of the brain or spinal cord to effectors
sensory neuron
transmitts impulse into brain or spinal cord from receptors
oligodendrocyte
myelin-forming neuroglia in brain and spinal cord
microglia
phagocytic neuroglia
effector
structure capable of respinding to motor impulses
ganglion
specialized mass of neuron cell bodies outisde the brain or spinal cord
ependymal cell
cells that cover the inside spaces of the brain ventricles and help regulate cerebrospinal fluid