Sensory systems

Question 1

What does a sensory receptors do?

Answer 1

TRANSDUCTION

responds to one of the sensory queues = discriminated between stimuli

Question 2

What does a sensory neuron do?

Answer 2

ENCODING
Process info about sensory queues
- duration, location, modality based on pathway signalling

Question 3

What is the sensory transduction cascade?

Answer 3

the energy from the stimulus is converted into an electrical signal

Question 4

Whats a generator potential?

Answer 4

Produced by a current
Sensors out background noise enviro = potentially lead to AP
Gives a graded response/ depolarisation to stimuli

Question 5

What is stimulus strength encoded by?

Answer 5

1. Amp of generator potential

2. Frequency of AP

Question 6

Whats the name of the somatic sensory system receptor for the face?

Answer 6

Trigeminal ganglia

Question 7

Whats the name of the somatic sensory system receptor for the body?

Answer 7

Dorsal root ganglia

Question 8

Whats a dermatone?

Answer 8

Region of the skin innervated by a single DRG

Question 9

What are receptor fields?

Answer 9

Areas of the skin surface over which stimulation results in a change in rate of action potentials
-Greater density of receptors = smaller receptive field = greater spatial acuity

Question 10

What are the 4 types of mechanoreceptors?

Answer 10

• Meissners corpuscle
• Merkel Disks
• Ruffini’s corpuscle
• Pacinian corpuscle