Week 6

Question 1

From a physical stimulus to an electrical signal. Used by the nervous system.

Answer 1

Transduction

Question 2

Steady depolarization of the outer segment of rods in complete darkness

Answer 2

The dark current

Question 3

Region in the sensory periphery within which stimuli can influence the electrical activity of sensory cells

Answer 3

Receptive field

Question 4

Área of space in which light can alter bipolar cell polarization (center-surround receptive field)

Answer 4

Bipolar cell receptive field

Question 5

Motion recognition. Also called the “where” and “how” stream

Answer 5

Dorsal stream

Question 6

Object recognition. Also called the “what” stream.

Answer 6

Ventral stream

Question 7

Information from the environment and its transmission to the CNS

Answer 7

Sensation

Question 8

Personalized interpretation of sensory data

Answer 8

Perception

Question 9

The pitch of a stimulus

Answer 9

Frequency

Question 10

The loudness of a stimulus

Answer 10

Amplitude

Question 11

Outer ear. Collects sounds

Answer 11

Auricle/pinna

Question 12

Middle ear. Contains 3 ossicles= malleus (hammer), incus (anvil), stapes (stirrup). Mechanically converts the vibrations into amplified pressure waves in the fluid of the cochlea

Answer 12

Ear drum

Question 13

Spiraled, hollowed, conical chamber of bone, in which waves propagate.

Answer 13

Cochlea

Question 14

Separates vestibular canal from cochlear canal

Answer 14

Reissner’s membrane

Question 15

Separates tympanic Canal from cochlear canal

Answer 15

Basilar membrane

Question 16

The sensory organ of hearing. Contains hair cells.

Answer 16

Organ of corti

Question 17

Acts as a receptor for auditory transduction. Sits on the basilar membrane. Attached to the tectorial membrane via cilia. Vibrations of the basilar membrane bends and activates this.

Answer 17

Hair cells

Question 18

Receives input from amacrine and bipolar cells. Provides sole output to the brain. Generates action potentials

Answer 18

Ganglion cells

Question 19

Receives projections from the LGN. Located in the occipital lobe

Answer 19

Striate cortex

Question 20

How touch is translated. Has unmyelinated axon fibers w/ mechanosensitive ion channels (activated by physical movement)

Answer 20

Mechanoreceptors

Question 21

Shape and texture mechanoreceptor

Answer 21

Merkel disk

Question 22

Motion detection and grip control mechanoreceptor

Answer 22

Meissner’s corpuscle

Question 23

Skin stretch and tangential force mechanoreceptor

Answer 23

Ruffini ending

Question 24

Perception of distant events through vibrations (mechanoreceptor)

Answer 24

Pacinian corpuscle

Question 25

Short lived version of pain

Answer 25

First pain

Question 26

Long lasting version of pain

Answer 26

Second pain

Question 27

Expressed in the cell membranes of olfactory receptor neurons. Responsible for the detection of odor molecules

Answer 27

Olfactory receptors