exam 3 Flashcards
cell bodies of somatic motor neurons are located in
the anterior gray horn and exit into the periphery via the ventral root
synapses that release ____ are described as adrenergic
norepinephrine
synapses that use ACH as a transmitter are called
cholinergic
which glial cells found in the PNS
satellite cells, schwann cells
whichglial cells found in the CNS
ependymal cells, astrocytes, oligodendrocytes, microglia
excitatory post synaptic potential
a graded depolarization caused by the arrival of a neurotransmitter at the postsynaptic membrane.
results from the opening and closing of chemically gated ion channels in the plasma membrane that lead to membrane depolarization
EPSP
inhibitory postsynaptic potential
a graded hyperpolarization of the post synaptic membrane
- said to be inhibited because a larger than usual depolarizing stimulus is needed to bring the membrane potential to threshold
inhibitory postsynaptic potential
a graded hyperpolarization of the post synaptic membrane
- said to be inhibited because a larger than usual depolarizing stimulus is needed to bring the membrane potential to threshold
integrates the effects of all the graded potentials that affect one portion of the plasma membrane
summation
dendrites of multipolar neurons
carry info toward the soma
smallest of blood vessels in which gases, nutrients, and wastes are exchanged
capillaries
internal jugular veins
drain blood from the brain
cerebral spinal fluid produced in the
choroid plexus
contains ependymal cells that regulate this process
excess cerebral spinal fluid returned to venous circulation by
diffusion across the arachnoid villi
minimizes number of motor commands
make movements more efficient and smooth
cerebellum
organized with control of foot muscles most medial, head muscles lateral
pre-central gyrus
pre-central gyrus is a part of the
primary motor cortex
directs voluntary movements
- controls contralateral muscles
primary motor cortex
primary sensory cortex
- post central gyrus
- receives contralateral somatic sensory information: touch, pressure
prefrontal cortex functional area
analyzes incoming info
left hemisphere
- language based skills
- analytical, mathematical, logic skills
tasked with
- identification of objects based on sensory info
- recognizing faces
- analyze emotional context of conversation or event
right hemisphere
reticular activation system
arousal and maintenance of consciousness
- broadcast to all areas of the brain
- increase or decrease activity in certain areas of the brain depending on what action needs to be happening
- needs to be recovered every 16 hours
motivational system
limbic system
