Special Sensory (sensory Receptors)

Question 1

Where are the sensory receptors located on a neuron?

Answer 1

-part of the dendrites

Question 2

What are the different types if sensory receptors? (4)

Answer 2

• chemoreceptors
• mechanoreceptors
• photoreceptors
• thermoreceptors

Question 3

What stimuli is needed to stimulate a chemoreceptor?

Answer 3

-oxygen, pH, various organic molecules such as glucose

Question 4

What stimuli is need to stimulate a mechanoreceptor?

Answer 4

• pressure (baroreceptors
• cell stretch (osmoreceptors)
• vibration
• acceleration
• sound

Question 5

What stimuli is needed to stimulate a photoreceptor?

Answer 5

-photons of light

Question 6

What stimuli is needed to stimulate a thermoreceptor?

Answer 6

-various degrees of heat

Question 7

Explain the conduction of a sensory stimulus

Answer 7

1) stimulus activates receptors
2) creates depolarization=receptor potential (graded potential)
3) reaches threshold
4) produces action potential

Question 8

What are tonic receptors? What is an example?

Answer 8

• slowly adapting receptors that respond for the duration of a stimulus
• ex. Pain receptor

Question 9

What are Phasic Receptors? What are some examples?

Answer 9

• receptors that rapidly adapt to a constant stimulus and turn off
• ex: odor, touch, temp

Question 10

Which sensory pathway does not pass through the thalamus? Where does it pass?

Answer 10

• olfactory pathway

- projects through the olfactory bulb to the olfactory cortex

Question 11

Equilibrium pathways project what area?

Answer 11

-cerebellum