1. general senses are found all over the body
2. the special senses are found only in the head
What is the difference between the general senses and the special senses?
touch, pain, pressure, temperature....
What are examples of general senses?
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1. general senses are found all over the body
2. the special senses are found only in the head
What is the difference between the general senses and the special senses?
touch, pain, pressure, temperature....
What are examples of general senses?
smell, taste, hearing, vision & balance/equilibrium
What are examples of the special senses?
A cell or sensory neuron that detects a stimulus
In terms of the senses, what is a receptor?
a sensory neuron
In the general senses, what often functions as the sensory receptor?
an internal receptor
What is an interoceptor?
an external receptor
What is an exteroceptor?
a receptor attached to joints, tendons, and muscles
What is a proprioceptor?
a receptor sensitive to chemicals
What is a chemoreceptor?
a pain receptor; nociceptors are chemoreceptors
What is a nociceptor?
a receptor sensitive to light
What is a photoreceptor?
a receptor sensitive to mechanical deformation
What is a mechanoreceptor?
a receptor sensitive to temperature
What is a thermoreceptor?
somatosensory system
Your general senses is also known as the
the post central gyrus
Where are the somatosensations perceived?
conscious awareness of a sensation
What is meant by perception?
3: Merkel's discs, Meissner's corpuscles, root hair plexuses
How many different sensory receptors for touch?
free nerve endings
What type of receptors detect pain, cold, heat?
3: first order, second order, and third order
How many sensory neurons are needed to consciously perceive a sensation?
in the CNS: either the spinal cord or brain stem
Where does a first order sensory neuron terminate?
the thalamus
Where do second order neurons terminate?
post-central gyrus
Where do 3rd order neurons terminate?
pre-central gyrus
Where do the somatic motor neurons originate?
upper motor neuron
What is the name of a motor neuron that originates on the pre-central gyrus?
lower motor neuron
What is the name of the motor neuron that makes contact with effectors?
skeletal muscle
What type of effector makes contact with a lower motor neuron in the somatic nervous system?
Acetylcholine
What type of neurotransmitter is released by LMN in the somatic nervous system?