13. The Peripheral Nervous System

What three types of mechanoreceptors respond to stretching, compression, twisting, or other distortions of their plasma membrane?

Characterize each receptor activity described below by choosing the appropriate letter and number(s) from keys A and B. 

_____    , _____  (1) You are enjoying an ice cream cone. 

_____    , _____  (2) You have just scalded yourself with hot coffee. 

_____    , _____  (3) The retinas of your eyes are stimulated. 

_____    , _____  (4) You bump (lightly) into someone. 

_____    , _____  (5) You are in a completely dark room and reaching toward the light switch. 

_____    , _____  (6) You feel uncomfortable after a large meal.

Key A:

a. Exteroceptor

b. Interoceptor

c. Proprioceptor

Key B:

(1) Chemoreceptor

(2) Mechanoreceptor

(3) Nociceptor

(4) Photoreceptor

(5) Thermoreceptor

Receptors in the saccule and utricle provide sensations of

(a) Angular acceleration

(b) Hearing

(c) Vibration

(d) Gravity and linear acceleration and deceleration

Differentiate between a tonic receptor and a phasic receptor.

_______ receptors are normally inactive, but become active for a short time whenever there is a change in the modality that they monitor.

Differentiate clearly between sensation and perception.