Sensory Systems

Question 1

Taste and smell
-Respond to molecules in
the environment (or our
mouth) that bind to
receptors in the cell
membrane

Answer 1

Chemosensory Systems

Question 2

Touch hearing and balance
-Respond to physical deformation
of the plasma membrane
* Opens a Na+ ion channel,
causing an action potential to fire
* Responsible for our sense of
touch

Answer 2

mechanoreceptor systems

Question 3

Sight

Answer 3

Electromagnetic receptor systems

Question 4

In most multicellular animals, the receptor
cells are organized into ______

Answer 4

sensory organs

Question 5

-Imbedded in cells that communicate with
neurons (taste and sight)
* Or are embedded
directly in neuron membranes (smell)

Answer 5

Membrane Receptors

Question 6

on
our tongue are
specialized cells that
synapse with sensory
neurons

Answer 6

Taste Buds

Question 7

What responds to light touch

Answer 7

Merkels Disks

Question 8

respond to touch
and low-frequency
vibration

Answer 8

Meissner’s
corpuscles

Question 9

detect stretch,
deformation within
joints, and warmth

Answer 9

Ruffini endings

Question 10

Detect transient pressure and high frequency

Answer 10

Pacinian Corpuscles

Question 11

Sense of hearing and balance are dependent on _______-

Answer 11

Hair Cells

Question 12

What do hair cells use to sense mechanical vibrations

Answer 12

stereocilia on their surface

Question 13

Hair cells that are
responsible for hearing in
vertebrates are contained in
the_______

Answer 13

cochlea

Question 14

Incus, malleus, and stapes

Answer 14

Middle ear bones

Question 15

ear detects gravity, acceleration, and deceleration using 3 semicircular canals

Answer 15

vestibular system

Question 16

Detects angular momentum in one plane that the head can turn (nodding up-down, turning left/right or moving side to side)

Answer 16

Semicircular canal

Question 17

Respond to e electrical, magnetic, and light stimuli

Answer 17

Electromagnetic receptors

Question 18

The most common electromagnetic receptors

Answer 18

Photoreceptors

Question 19

Light sensitive protein that converts light energy into electrical signals

Answer 19

opsin

Question 20

Each Opsin protein contains what

Answer 20

A pigment called retinal

Question 21

composed of hundreds of ommatidia each a lens that individually sense light.

Answer 21

Compound Eye (fly)

Question 22

focuses light on a retina and allows for a high degree of acuity
–focus an inverted
image on the retina, a thin,
photoreactive tissue in the back of
the eye

Answer 22

Single-lens eye (humans)

Question 23

what kind of eye only detects light intensity
and direction

Answer 23

Eyecups

Question 24

blue-green sensitive; the
brain interprets this as black-and-
white vision

Answer 24

Rod cells

Question 25

Provide color vision

Answer 25

Cone cells