NATS 1870 FINAL EXAM REVIEW 2023, Accurate and Rated A+
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1. through accommodation, your eye can change its refractive power to help
it focus images by: changing the shape of the lens itself, via attached ciliary
...
NATS 1870 FINAL EXAM REVIEW 2023, Accurate and Rated A+
1 / 24
1. through accommodation, your eye can change its refractive power to help
it focus images by: changing the shape of the lens itself, via attached ciliary
muscles contracting or relaxing it (lesson 13)
2. we have blurry vision in water (such as in a swimming pool) because: -
cornea itself is mostly made of water, reducing the difference in indices of refraction
(lesson 13)
3. a person born with no (functioning) retina in his eyes would: be completely
blind (lesson 13)
4. although the eye and camera share the light capturing functionalities
in common between them, the eye differs from a camera in another key
subsequent functionality known as: transduction (lesson 13)
5. in what sense might we be using colours as symbols?: colours are symbols
for different light stimuli (lesson 13)
6. t or f: cones require brighter lighting conditions than rods to function: true
(lesson 13)
7. without any blood vessels attached to them, and themselves composed
of tightly packaged crystalline fibres, cornea and lens remain: transparent
(lesson 13)
8. what was the earliest form of vision like?: in black and white only, using rods
(lesson 13)
9. which labelled position in this diagram indicated the location where most
of the cones can be found?: D (lesson 13)
10. the image below shows an example of one of our important uses of
colour. what is it?: distinguishing objects from one another (lesson 13)
11. out of the following aspects involved in colour vision, which one is
considered to be the MOST known and understood by science?: anatomy of
the eye (lesson 13)
12. which of these three diagrams shows how an image is focused in someone who is near sighted?: c (lesson 13)
13. which parts of the human eye do NOT contribute to the focusing of the
incoming light?: all contribute to focusing (all: cornea, aqueous humor, vitreous
humor, lens)
(lesson 13)NATS 1870 FINAL EXAM REVIEW 2023, Accurate and Rated A+
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14. the opponent colour system: subtracts cone signals from each other, to
distinguish colours (lesson 13)
15. the S, M and L type cones evolved in past organisms at different times
in history. rank their first appearance in chronological order, from oldest to
most recent: L-S-M (lesson 13)
16. which of these is NOT true about the photoreceptors?: they are all mostly
concentrated at the fovea
(true things: there are about 100 million of them in each human eye, they are neural
cells, there are no photoreceptors at the blind spot of each eye)
(lesson 13)
17. why are the terms 'pupil dilation' and 'pupil constriction' technically
incorrect?: it is not the pupil itself that dilates or constricts (lesson 13)
18. almost all of the refraction of light in the eye is accomplished by which
part(s)?: cornea and lens (lesson 13)
19. what would be an advantage for an organism to have trichromatic
colour vision over dichromatic?: ability to better distinguish differences between
colours (lesson 13)
20. "what colour" is a question that: involves both objective and physical explanations involving light and subjective descriptions of the brain's perceptions (lesson
13)
21. the term 'action potential' is used to describe: the passing of an electric
signal inside a neural cell (lesson 14)
22. why is cone vision higher in acuity (sharpness of detail perceived) than
rod vision?: due to cones' low convergence, with each single cone connected to
a single neuron receiving its signal (lesson 14)
23. how do the bipolar and horizontal cells 'know' that a photon had been
absorbed and converted into a neural signal by the photoreceptor cell before
them?: There is a drop in neurotransmitters being sent to them from the photoreceptor. (lesson 14)
24. As this diagram of the 'electrical wiring' of rods-to-ganglion-cell (red
circle) versus cones-to-ganglion-cells shows,: 'rod-vision' is more sensitive
than 'cone-vision' since output from multiple rods converges together to trigger a
single ganglion cell to fire (lesson 14)
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