©THEBRIGHT EXAM SOLUTIONS
11/8/2024 12:08 PM
PSYCH 111: Exam 1 Questions And Answers
100% Pass
What is transduction (in sensation/perception)? - answer✔senses must convert physical stimulus energy
(ex. chem. molecules) into electrical changes in nerve receptor cells; "it's no USE if you can't
TRANSDUCE"
What is the absolute threshold? - answer✔lowest level of a stimulus - light, sound, touch, etc. - that an
organism could detect
What is the function of a rod (in vision)? - answer✔operate under low illumination and achromatic;
night time receptors/allow us to see in dim light; cannot see fine spatial detail; cannot see different
colors; detect motion/peripheral vision
What is the function of a cone (in vision)? - answer✔operate under high illumination and chromatic;
packed around fovea (frontal vision); daytime receptors/allow us to see in bright light; allow us to see
fine spatial detail; allow us to see different colors
What is the retina? - answer✔the light-sensitive inner surface of the eye, containing the receptor rods
and cones plus layers of neurons that begin the processing of visual information
What are ganglion cells? - answer✔neurons that relay information from the retina to the brain via the
optic nerve
What is the optic nerve? - answer✔comprised of millions of nerve fibers that send visual messages to
your brain to help you see; connected to the back of each eye
What is the fovea? - answer✔a small depression within the neurosensory retina where visual acuity is
the highest; the central portion of the macula, which is responsible for central vision
What is the trichromatic color vision theory? - answer✔we have 3 types of cones and each is sensitive to
different wavelengths of light (blue: lower wavelength; green: medium; red: higher)
What is the opponent process theory of color vision? - answer✔Herring proposed that we have two
types of color opponent cells:
- red-green opponent cells (red+/green- (excited signals red/inhibited signals green), red-/green+)
- blue-yellow opponent cells (blue+/yellow-, blue-/yellow+)
11/8/2024 12:08 PM
PSYCH 111: Exam 1 Questions And Answers
100% Pass
What is transduction (in sensation/perception)? - answer✔senses must convert physical stimulus energy
(ex. chem. molecules) into electrical changes in nerve receptor cells; "it's no USE if you can't
TRANSDUCE"
What is the absolute threshold? - answer✔lowest level of a stimulus - light, sound, touch, etc. - that an
organism could detect
What is the function of a rod (in vision)? - answer✔operate under low illumination and achromatic;
night time receptors/allow us to see in dim light; cannot see fine spatial detail; cannot see different
colors; detect motion/peripheral vision
What is the function of a cone (in vision)? - answer✔operate under high illumination and chromatic;
packed around fovea (frontal vision); daytime receptors/allow us to see in bright light; allow us to see
fine spatial detail; allow us to see different colors
What is the retina? - answer✔the light-sensitive inner surface of the eye, containing the receptor rods
and cones plus layers of neurons that begin the processing of visual information
What are ganglion cells? - answer✔neurons that relay information from the retina to the brain via the
optic nerve
What is the optic nerve? - answer✔comprised of millions of nerve fibers that send visual messages to
your brain to help you see; connected to the back of each eye
What is the fovea? - answer✔a small depression within the neurosensory retina where visual acuity is
the highest; the central portion of the macula, which is responsible for central vision
What is the trichromatic color vision theory? - answer✔we have 3 types of cones and each is sensitive to
different wavelengths of light (blue: lower wavelength; green: medium; red: higher)
What is the opponent process theory of color vision? - answer✔Herring proposed that we have two
types of color opponent cells:
- red-green opponent cells (red+/green- (excited signals red/inhibited signals green), red-/green+)
- blue-yellow opponent cells (blue+/yellow-, blue-/yellow+)
