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Author Question: A unique feature of the retinal circuitry is that a. there are more cones than rods in the ... (Read 62 times)

bcretired

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on: Jun 22, 2018
A unique feature of the retinal circuitry is that
 
  a. there are more cones than rods in the retina.
  b. light must pass through the circuitry in order to stimulate the photoreceptors.
  c. the rods are packed together at the center of the retina.
  d. rods send signals through cones, which then activate the ganglion cells.
  e. photoreceptors do not influence the activity of surrounding nerve cells.

Question 2

The process of accommodation involves
 
  a. the lens becoming smaller as one ages.
  b. contraction of the ciliary muscles to constrict the pupil.
  c. contraction of the ciliary muscles to dilate the pupil.
  d. hardening of the lens as one ages.
  e. the lens becoming more rounded to focus on near objects.


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ashely1112

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Reply #1 on: Jun 22, 2018
Answer to Question 1

Answer: b. light must pass through the circuitry in order to stimulate the photoreceptors.

Answer to Question 2

Answer: e. the lens becoming more rounded to focus on near objects.


bcretired

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Reply 2 on: Jun 22, 2018
Excellent

tanna.moeller

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Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

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