Characteristics of Sensory Receptors

Question 1

Define Sensory Transduction.

Answer 1

Changing the energy of a stimulus into neural energy

Question 2

Stimulus energy involved with Sensory Transduction may be in the form of what types of energy?

Answer 2

1. ) Mechanical
2. ) Chemical
3. ) Light

Question 3

Stimulus energy (ie. mechanical, chemical, light) produces a change in the receptor membrane such that what occurs?

Answer 3

Such that local potential difference occurs

Question 4

An example of local potential difference occuring would be?

Answer 4

Na+, K+, and Cl- channels opening to allow ion movement

Question 5

In the example of Na+, K+, and Cl- channels opening up to allow ion movement, the potential change is ______ and spreads how far as it decays?

Answer 5

Local and spreads only a few millimeters as it decays

Question 6

Define threshold for stimulation

Answer 6

The amount of stimulus energy it takes to cause a local receptor potential

Question 7

The amount of stimulus energy it takes to cause a local receptor potential depends on what?

Answer 7

Physical properties of the receptor itself

Question 8

If receptors have low thresholds what type of stimulus (small or large) does it take to cause a local receptor potential?

Answer 8

Small

Question 9

If receptors have high thresholds what type of stimulus (small or large) does it take to cause local receptor potential?

Answer 9

Large

Question 10

Meissner’s Corpuscle receptors are affiliated with what type of stimulus?

Answer 10

Low frequency vibration

Question 11

Ruffini endings are affiliated with what time of stimulus?

Answer 11

Skin Stretch, joint movement

Question 12

Define Threshold for Perception.

Answer 12

Lowest stimulus intensity necessary for perception of stimuls

–usually same as receptor threshold

Question 13

Define Adaptation.

Answer 13

The duration for which the receptor potential is generated to the stimulus

Question 14

Adaptation is determined by what?

Answer 14

The morphology of the receptor

Question 15

Pacinian Corpuscle receptor potential is condsidered ______ adapting.

Answer 15

Rapidly

Question 16

The idea that Pacinian corpuscle receptor potential is rapidly adapting means what in regards to it’s generator potential

Answer 16

Means that the generator potential is only generated when the stimulus comes on or off.

Question 17

Rapidly Adapting Action potentials will only be generated when?

Answer 17

At the onset and offset of the stimulus

Question 18

Ruffini corpuscles are considered ______ adapting.

Answer 18

Slowly

Question 19

Slowly Adapting Action potentials signal when?

Answer 19

Throughout the duration of the stimulus