Exam 2 - Sensory System

Question 1

Type of sensory receptors

Answer 1

simple, complex neural and specials senses receptors

Question 2

Simple receptors

Answer 2

These are neurons with free nerve endings, and can either have myelinated or unmyelinated axons

Question 3

Complex neural receptors

Answer 3

These have nerve endings enclosed in connective tissue capsules, ex: Pacinian corpuscle, senses touch

Question 4

Special senses receptors

Answer 4

Cells that release neurotransmitter onto sensory neurons, initiating an action potential; Ex: hair cell

Question 5

Chemoreceptors

Answer 5

Respond to chemical ligands that bind to receptor (ex: taste and smell)

Question 6

Mechanoreceptors

Answer 6

respond to various forms of mechanical energy, including pressure, vibration, gravity, acceleration and sound

Question 7

Thermoreceptors

Answer 7

respond to temperature

Question 8

Photoreceptors

Answer 8

responds to light (vision)

Question 9

Proprioceptors

Answer 9

muscle and joint sensory receptors that allows awareness of body movement and position in space

Question 10

Processing distinguish stimulus properties (sensory coding)

Answer 10

CNS must distinguish 4 properties of a stimulus:

1. modality
2. location
3. intensity
4. duration

Question 11

Modality of a stimulus

Answer 11

indicated by which sensory neurons are activated and by where the pathways of the activated neurons terminate in the brain

Question 12

labeled line coding

Answer 12

when the brain associates a receptor with a sensation with a specific modality