___(conscious and reflex) sensory receptors in joints and muscle spindles
the translation of external stimulus to action potentials
what is the only function of a graded potential?
to initiate an action potential
the magnitude of a graded potential determines the __ of an action potential and not this.
__ __: important for tactile acuity (gives you a greater sense of where you're being touched)
there is very little lateral inhibition w/__ and __ fibers
some __ receptors and __ receptors are rapidly adapting.
__ __ receptors: sense rate of change
__ __ receptors: senses stimulus duration
what are the 2 types of thermal receptors?
normal body temp is __°C. normal skin temp is __°C
cold thermal receptors are sensitive to skin temp __-__°C below nrml skin temp.
warm thermal receptors are sensitive to skin temp __-__°C above nrml skin temp.
pain is mediated by ____
what are the 3 types of nociceptors?
thermal, mechanical, poly-
tissue damage can cause __-lowering of threshold of free nerve endings, e.g. bruise
in peripheral nerves there are several types of nerve fibers, some of ehich are myelinated and some unmyelinated. unmyelinated fibers are called __. they carry sensory modalities of temp, aching pain, pressure, crude touch. the speed of these fibers are .5-2 m/s.
myelinated fibers are __fibers. there are 4 types.
of the 4 types of A fibers, which are the fastest (120m/s) and which are the slowest? (6 m/s)
fibers carrying axons from α motor neurons (__ horn of spinal cord) are Aα fibers and fibers carrying axons from γ motor neurons (__ horn of spinal cord) are Aγ fibers. γ motor neurons are motor efferent fibers to muscle spindles.
__= opiod antagonist, stops body's tendency to reduce pain
__ any response that occurs autom w/out conscious effort
which reflex is monosynaptic? polysynaptic?
stretch, flexor withdrawal
__ __ reflex- extensors of opposite limb contract, pushing the body away from the pain stimulus. (withdraw on one side, extend on other)
which 2 reflexes are coded in the spinal cord?