nerve Flashcards
the activities of an animal are regulated by its nervous system and its
endocrine
a series of ion charges which pass along a nerve fiber is an
message
impulse
reverse-polarity
action-potential
three major portions of a neuron are the cell body, end brush, and
dendrites
clusters of nerve-cell bodies, which are a location of multiple interconnections, are called
ganglia
two neurtransmitters which can carry impulses across the synapse are
adrenaine and seratonin
when the inside of the membrane of an axon is negative, the membrane is said to be
resting
the stronger the stimuus, the more ___ are the impulses
frequent
what carry impulses away from the spinal cord?
motor
what carries impulses to the spinal cord
assosiative
the type of nervous ssytem isn hydra is
net
the earthworm’s nerve cord is on the what side
ventral
the capacity of protoplasm to respond to stimuli is called
irritability
paramecium moves toward food by using?
cilia
the earthwrom’s brain is aka
ganglia
animals with heads are said to be
bilateral
where would your impulses travel when you react?
sensory, associative, motor
why is there a higher concentration of potassium ions inside the cell than outside?
active transport
the sympathetic and parasympathetic makeup the
autonomic nervous system
sympathetic
go
parasympathetic
stop
a synapse,
a. ions diffuse across the gap
b. hormones cross the gap
c. NTs are released
c
the axon of a neuron is protected by
a myelin sheath
which type of neuron is responsible for transmitting impulses to a gland?
a. sensory
b. motor
c. associative
b
the nerve impulse may best be considered as
a. movement of ions
b. active transsport
a
the hydra does not have a
centralized nerve cord
a definite pathway from receptors to effectors is characteristics of a
centralized nervous system
earthworms have waht?
a ventral centralised nerve cord
describe the path of the impulses
terminal end branch membrane does exocytosis vesicle containing neurons secreted NTs diffuse across synapse lock and key w adjacent dandrite
myelinated: fast or slow
fast
unmyelinated: fast or slow
slow
what switches the ions back to resting state?
active transport
