Lec 12

Question 1

Sensory systems

Answer 1

Brings stimulus info to the brain

Sometimes brings external stimulus into the brain

Sometimes the stimuli conveys info about internal states

Question 2

Sensory receptors

Answer 2

Specialized cells for detection particular stimuli

Question 3

Sensory neuron

Answer 3

A sensory receptor in the form of a neuron with a modified ending

More often the receptor is an epithelial cell that synapses on an afferent neuron

Question 4

Mechanoreceptors

Answer 4

Mechanical energy

Question 5

Chemoreceptors

Answer 5

Chemical receptors

Question 6

Photoreceptors

Answer 6

Electromagnetic energy

Question 7

Two types of somatosensation

Answer 7

Cutaneous sensations

Proprioception and kinesthesis

Question 8

Cutaneous sensations

Answer 8

Tactile perception- Mechanical stimulation of skin

Temperature

Pain

Question 9

Proprioception and kinesthesis

Answer 9

Sense of limb position and movement

Question 10

Thermoreceptors-warm fibres

Answer 10

Increase firing rate in response to warm, decrease to cold

Question 11

Thermoreceptors-cold fibres

Answer 11

Increase firing rate in response to cold, decrease to warm

Question 12

Nociceptors (Pain)

Answer 12

Respond to intense pressure, temperature, and potentially damaging chemicals

Polymodal (mostly) or unimodal

Question 13

Somatotopic mapping-homunculus

Answer 13

Representation of important areas, magnified hands and lips

Question 14

Insect touch mechanoreceptor

Answer 14

Bristles all over the exoskeleton known as sensillum are present

When the bristles move, the dendrites bend, opening stretch activated cation channels