Receptors and Reflexes Flashcards
what is the definition fo a receptor
any structure specialized to detect a stimulus
if a stimulus is strong enough it will create a __ on the __
postsynaptic potential, sensory neuron
it is an __ if you become aware of the stimulus
EPSP
an ___ is any receptor monitoring something outside the body and are found within__
exteroreceptor, the mouth, lungs, and gut because they lead to the outside.
an ___ is only looking at stimuli that is occurring inside the body.
interoreceptor
anytime a receptor undergoes __ it can alter its sensitivity to that stimulus.
adaptation
___ are fast fast adapting while __ are slow adapting but generate signals more steadily.
phasic receptors, tonic receptors
a __ is a quick and involuntary response to a stimulus
reflex
___ reflexes are reflexes we are born with
somatic
a __ involves a stimulus or sensory neuron that carries it to gray matter and integrates sometimes with an interneuron then to a motor neuron leading to an effector organ.
reflex arc
__contain vesicles containing neurotransmitters.
varicosities
Any reflex arc that lacks an __ is considered a monosynaptic reflex arc.
interneuron
Reflexes that have one or more ___ are polysynaptic reflex arc.
interneurons
what is the stimulus for a stretch reflex
stretch
a muscle spindle is composed of how many muscle fibers
3-10
a muscle spindle is the location of __
receptors
do intramural fibers cause movement of the joints when they contract?
no, but they can change the length of the muscle
In order for muscle spindle to be sensitive it needs to ____. This is when reflex arcs are being put into use.
adjust in length as muscles are being stretched
the ___sensory is the only one that can monitor the rate of stretch.
primary
do both primary and secondary sensory monitor degree?
yes
does alpha or gamma cause contraction?
alpha
the __ reflex causes contraction and the ___causes relaxation of the antagonist.
monosynaptic, polysynaptic
define reciprocal activation
activation of the antagonistic muscles
a __ is any structure specialized to detect a stimulus
receptor