Chapter 14: Integration Flashcards
Neurons of the thalamus that are part of sensory conduction pathways are considered…
a) primary neurons
b) secondary neurons
c) tertiary neurons
d) quaternary neurons
c) tertiary neurons
Sensory Pathways
- touch, pain, temp
- travels from body through spinal cord to brain
Motor Pathways
- voluntary & reflex control of skeletal muscle through motor pathways connecting brain to skeletal muscles
List neurons in a pathway chain
1st order neuron, 2nd order neuron, 3rd order neuron
1st Order Neuron
- receptors of pain, temp, touch, and pressure stimulate neuron
- cell body found in dorsal root ganglion
- info passed to 2nd order neuron
2nd Order Neuron
- cell bodies found in spinal cord or brain stem
- synapse/cross on 3rd order neuron
3rd Order Neuron
- in thalamus
- carry sensory info to PSC (primary somatosensory cortex)
- not all info reaches awareness (1%)
The afferent neuron that carries the sensation and enters the CNS is a ______ neuron
a) 1st order
b) 2nd order
c) 3rd order
d) Interneuron
e) Motor
a) 1st order neuron
Which of the following are examples of general senses?
a) Touch
b) Temp
c) pain
d) pressure
e) proprioception
f) olfaction
g) vision
h) hearing
i) gustation
j) equilibrium
a, b, c, d, e
Sensory Receptors Based on Activation Stimulus
- nociceptors
- photoreceptors
- thermoreceptors
- chemoreceptors
- mechanoreceptors
Nociceptors
pain receptors
- respond to mechanical, chemical, and thermal stimuli
Photoreceptors
respond to light
- necessary for vision
Thermoreceptors
respond to change in temp @ site of receptor
- needed for sensing temp
Chemoreceptors
respond to chemicals
- taste & smell
Mechanoreceptors
respond to force
- bending, compression, & stretching of cells
Sensory Receptors Based on Location
- exteroreceptors
- interoreceptors
- proprioreceptors
Exteroreceptors
Proprioreceptors
respond to joints, tendons, & other connective tissues
- provide info abt body position, movement, stretch, & force of contractions
A receptor that contains many mechanically-gated ion channels would function best as a…
a) tactile receptor
b) chemoreceptor
c) photoreceptor
d) thermoreceptor
e) light receptor
a) tactile receptor
All of the following are true of fast pain sensations EXCEPT that they…
a) are carried by type A fibers
b) reach the CNS quickly
c) receive conscious attention
d) often trigger somatic reflexes
e) are interpreted by the prefrontal cortex
e) are interpreted by the prefrontal cortex
