BIOS 252 COMPREHENSION EXAM 2024 4
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2 types of summation - *temporal (wave) summation: one presynaptic neuron to one postsynaptic
membrane
*spacial summation: multiple presynaptic neurons to one postsynaptic membrane
describe ligand gated channels - responds to chemical stimuli that bond to receptors
describe voltage gated channels - respond to a direct change in membrane potential
describe mechanically gated channels - responds to mechanical change
describe hyperpolarization - membrane potential makes inside of cell more negative than resting
potential
6 glial cells found in NS - *satellite
*schwann
*oligodendrocytes
*microglial
*astrocytes
*ependymal
function of the satellite cells - provides support for the nerves in the PNS
function of the schwann cells - produce myelin in PNS
function of oligodendrocytes - produce myelin in CNS
function of the microglial cells - work as macrophages in CNS
function of the astrocytes - *creates blood brain barrier
*most abundant cell in the CNS
function of the ependymal cells - produce cerebral spinal fluid
describe the reticular activating system - bundle of nerves at brain stem that filters out
unnecessary info so the imp. info gets through
identify the lesser tubercle of the humerus -
identify the lateral epicondyle of the humerus –
what are the 9 abdominopelvic regions? - *left hypochondriac
*epigastric
*right hypochondriac
*left lumbar
*umbilical
*right lumbar
*left inguinal (iliac)
*hypogastric
*right inguinal (iliac)
what are the 11 organ systems - *nervous
*respiratory
*endocrine
*digestive
*muscular
*reproductive
*circulatory
*integumentary
*skeletal
*lymphatic
*urinary
function of nervous system - transmits signals from the brain to the rest of the body
function of respiratory system - brings oxygen into the body while removing carbon dioxide
function of endocrine system - regulates body activities by releasing harmones
function of digestive system - break down and absorbs nutrients from food and liquid and
removes waste
function of muscular system - movement and heat production
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