Sensory Systems, Taste and Olfaction I

Question 1

What is a lateral line system?

Answer 1

In some animals, they can detect a change in pressure.

Question 2

List the 4 receptors of the skin.

Answer 2

Meissner’s corpuscle
Markel Cells
Pacinian corpuscle
Ruffini endings

Question 3

Sensory receptors transform mechanical energy to..?

Answer 3

electrical energy

Question 4

Name the 4 receptor types to do with Modality.

Answer 4

Mechanoreceptors (hair cells)
Chemoreceptors (taste buds)
Thermoreceptors
Photoreceptors

Question 5

Describe the 3 main transduction mechanisms for modality.

Answer 5

Mechanical: directly onto one cell
Chemical: Uses 2nd messenger or direct
Photoreceptor: uses 2nd messenger

Question 6

What receptor is specific to mechanical transduction?

Answer 6

Muscle spindles (they become displaced).

Question 7

What is the spatial arrangement of receptors called?

Answer 7

Receptive field. Smaller receptor fields are more accurate as they have many neurons on the skin for precision.

Question 8

Why is the density of the receptor field important?

Answer 8

For resolution. Density is not uniform throughout the sensory organ. They can be localised for higher definition (e.g. fovea)

Question 9

With an increase in intensity, there is an increase in……

Answer 9

rate of impulses. It is determined by the stimulus amplitude.