Chapter 13 - Neuronal Communication

Question 1

What are sensory receptors

Answer 1

Detect environmental change
Specific to a stimulus
Act as a transducer

Question 2

What is a transducer

Answer 2

Converts a stimulus into an impulse
Generator potential

Question 3

Mechanoreceptor

Answer 3

Stimulus = pressure
Eg. Pacinian corpuscle in skin

Question 4

Chemoreceptor

Answer 4

Stimulus = chemicals
Eg. Olfactory receptor In nose

Question 5

thermoreceptors

Answer 5

Stimulus = heat
Eg. End bulbs of Krause in tongue

Question 6

Photoreceptors

Answer 6

Stimulus = light
Eg. Cone cells in eyes

Question 7

Myelin sheath

Answer 7

Schwann cells wrap around the axon, the layers of plasma membrane insulate

Question 8

Function of myelin

Answer 8

Insulation increases speed on impulse transmission

Question 9

Myelinated vs non-myelinated

Answer 9

Myelinated: 100m/s impulse transmission
Non-myelinated: 1m/s

Question 10

Node of ranvier

Answer 10

Gaps in myelin sheath