NUR 256 PSYCH EXAM 2 2026 GALEN
COLLEGE OF NURSING FULL QUESTIONS AND
CORRECT ANSWERS GRADED A+
◉ transduction= Answer: conversion of physical signals and neural
signals (temperature, sense, smell- how do these cause neurons to fire)
◉ Perception= Answer: organize and interpret signals, make sense of
them (how does your brain make sense of these signals)
◉ Psychophysics
Data reduction= Answer: only process small fraction of possible
information/ data
-Wired to process only important info and data
(smell, light, taste)
◉ sensory adaptation= Answer: importance of NEW info (signal we
should pay attention)
(when something hasn't changed for a while we stop noticing it; ex=
perfume)
◉ Absolute threshold= Answer: the lowest intensity of a stimulus (light,
sound, touch, smell, taste) that an organism can detect 50% of the time
,◉ What are built in thresholds? Answer: cant hear every noise, cant see
all light
◉ What is subliminal perception? Answer: the brain can somewhat
process it but we cant fully comprehend it (the processing of information
by sensory systems without conscious awareness)
◉ What is humans primary sensory tool? Answer: Vision
◉ Whats the cornea and its function? Answer: outer layer of eye (tough
clear membrane which keeps things out of eyes) doesn't do much for
vision but it does protect
◉ What is the pupil and its function? Answer: A small opening that
allows light to enter the eye
◉ What is the iris and its function? Answer: The colored part of the eye
that regulates the amount of light entering through the pupil (contracts
and relaxes to control pupil size/ light control)
◉ What is the lens and its function? Answer: a structure that changes
shape to focus light onto the retina and focus image
, ◉ What is near sightedness? Answer: the front part of the eye is too
curved. This makes it hard to focus on things far away, but easier to see
things up close.
sharpest imagine is in front of the retina
◉ Why are older people prone to bad eye sight? Answer: because your
age lens becomes less flexible
◉ What is the retina (fovea)? Answer: where image is hitting the retina
(where sharpest vision is)
membrane in the back of the eye where seeing happens, also where the
1st set of neurons fire lined with photoreceptors fire when light waves
hit them
◉ What are photorecptors? Answer: rods and cones (100 million in each
eye)
◉ What does light have to go through to get to the rods and cones?
Answer: has to go through whole eyes (cloudy membrane), ganglion
cells, bipolar cells to get to the rods and cones
◉ What are cones? Answer: sharper vision, color, high light, sharp crisp
edges (densely packed in the fovea) ONLY WORK WHEN ITS LIGHT
OUTSIDE, requires lots of energy
COLLEGE OF NURSING FULL QUESTIONS AND
CORRECT ANSWERS GRADED A+
◉ transduction= Answer: conversion of physical signals and neural
signals (temperature, sense, smell- how do these cause neurons to fire)
◉ Perception= Answer: organize and interpret signals, make sense of
them (how does your brain make sense of these signals)
◉ Psychophysics
Data reduction= Answer: only process small fraction of possible
information/ data
-Wired to process only important info and data
(smell, light, taste)
◉ sensory adaptation= Answer: importance of NEW info (signal we
should pay attention)
(when something hasn't changed for a while we stop noticing it; ex=
perfume)
◉ Absolute threshold= Answer: the lowest intensity of a stimulus (light,
sound, touch, smell, taste) that an organism can detect 50% of the time
,◉ What are built in thresholds? Answer: cant hear every noise, cant see
all light
◉ What is subliminal perception? Answer: the brain can somewhat
process it but we cant fully comprehend it (the processing of information
by sensory systems without conscious awareness)
◉ What is humans primary sensory tool? Answer: Vision
◉ Whats the cornea and its function? Answer: outer layer of eye (tough
clear membrane which keeps things out of eyes) doesn't do much for
vision but it does protect
◉ What is the pupil and its function? Answer: A small opening that
allows light to enter the eye
◉ What is the iris and its function? Answer: The colored part of the eye
that regulates the amount of light entering through the pupil (contracts
and relaxes to control pupil size/ light control)
◉ What is the lens and its function? Answer: a structure that changes
shape to focus light onto the retina and focus image
, ◉ What is near sightedness? Answer: the front part of the eye is too
curved. This makes it hard to focus on things far away, but easier to see
things up close.
sharpest imagine is in front of the retina
◉ Why are older people prone to bad eye sight? Answer: because your
age lens becomes less flexible
◉ What is the retina (fovea)? Answer: where image is hitting the retina
(where sharpest vision is)
membrane in the back of the eye where seeing happens, also where the
1st set of neurons fire lined with photoreceptors fire when light waves
hit them
◉ What are photorecptors? Answer: rods and cones (100 million in each
eye)
◉ What does light have to go through to get to the rods and cones?
Answer: has to go through whole eyes (cloudy membrane), ganglion
cells, bipolar cells to get to the rods and cones
◉ What are cones? Answer: sharper vision, color, high light, sharp crisp
edges (densely packed in the fovea) ONLY WORK WHEN ITS LIGHT
OUTSIDE, requires lots of energy
