This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: A unique feature of the retinal circuitry is that a. there are more cones than rods in the ... (Read 61 times)

bcretired

  • Hero Member
  • *****
  • Posts: 525
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.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

ashely1112

  • Sr. Member
  • ****
  • Posts: 347
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

  • Member
  • Posts: 525
Reply 2 on: Jun 22, 2018
Wow, this really help

cici

  • Member
  • Posts: 325
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

Astigmatism is the most common vision problem. It may accompany nearsightedness or farsightedness. It is usually caused by an irregularly shaped cornea, but sometimes it is the result of an irregularly shaped lens. Either type can be corrected by eyeglasses, contact lenses, or refractive surgery.

Did you know?

It is important to read food labels and choose foods with low cholesterol and saturated trans fat. You should limit saturated fat to no higher than 6% of daily calories.

Did you know?

In women, pharmacodynamic differences include increased sensitivity to (and increased effectiveness of) beta-blockers, opioids, selective serotonin reuptake inhibitors, and typical antipsychotics.

Did you know?

Elderly adults are living longer, and causes of death are shifting. At the same time, autopsy rates are at or near their lowest in history.

Did you know?

Fungal nail infections account for up to 30% of all skin infections. They affect 5% of the general population—mostly people over the age of 70.

Photograph of the retina of the eye. The optic disk appears yellow and the retinal arteries radiate Photograph of the retina of the eye. The optic disk appears yellow and the retinal arteries radiate
In the Tai Forest a female chimp demonstrates a skill once thought to be unique to humans. Here she In the Tai Forest a female chimp demonstrates a skill once thought to be unique to humans. Here she
Absorbance of Light by Rods and Cones Absorbance of Light by Rods and Cones
The rotating assembly for a V-8 engine that has eight pistons and connecting rods and one ... The rotating assembly for a V-8 engine that has eight pistons and connecting rods and one ...
Generation of various modified dihybrid ratios from the nine unique genotypes Generation of various modified dihybrid ratios from the nine unique genotypes
Video: DNA close up Animation

For a complete list of videos, visit our video library