Chapter 14: Integration

Question 1

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

Answer 1

c) tertiary neurons

Question 2

Sensory Pathways

Answer 2

• touch, pain, temp
• travels from body through spinal cord to brain

Question 3

Motor Pathways

Answer 3

• voluntary & reflex control of skeletal muscle through motor pathways connecting brain to skeletal muscles

Question 4

List neurons in a pathway chain

Answer 4

1st order neuron, 2nd order neuron, 3rd order neuron

Question 5

1st Order Neuron

Answer 5

• receptors of pain, temp, touch, and pressure stimulate neuron
• cell body found in dorsal root ganglion
• info passed to 2nd order neuron

Question 6

2nd Order Neuron

Answer 6

• cell bodies found in spinal cord or brain stem
• synapse/cross on 3rd order neuron

Question 7

3rd Order Neuron

Answer 7

• in thalamus
• carry sensory info to PSC (primary somatosensory cortex)
• not all info reaches awareness (1%)

Question 8

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

Answer 8

a) 1st order neuron

Question 9

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

Answer 9

a, b, c, d, e

Question 10

Sensory Receptors Based on Activation Stimulus

Answer 10

1. nociceptors
2. photoreceptors
3. thermoreceptors
4. chemoreceptors
5. mechanoreceptors

Question 11

Nociceptors

Answer 11

pain receptors
- respond to mechanical, chemical, and thermal stimuli

Question 12

Photoreceptors

Answer 12

respond to light
- necessary for vision

Question 13

Thermoreceptors

Answer 13

respond to change in temp @ site of receptor
- needed for sensing temp

Question 14

Chemoreceptors

Answer 14

respond to chemicals
- taste & smell

Question 15

Mechanoreceptors

Answer 15

respond to force
- bending, compression, & stretching of cells

Question 16

Sensory Receptors Based on Location

Answer 16

1. exteroreceptors
2. interoreceptors
3. proprioreceptors

Question 17

Exteroreceptors

Question 18

Proprioreceptors

Answer 18

respond to joints, tendons, & other connective tissues
- provide info abt body position, movement, stretch, & force of contractions

Question 19

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

Answer 19

a) tactile receptor

Question 20

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

Answer 20

e) are interpreted by the prefrontal cortex