This topic contains a solution. Click here to go to the answer

Author Question: A unique feature of the retinal circuitry is that a. there are more cones than rods in the ... (Read 63 times)

bcretired

  • Hero Member
  • *****
  • Posts: 525
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
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
Gracias!


kswal303

  • Member
  • Posts: 316
Reply 3 on: Yesterday
Wow, this really help

 

Did you know?

Thyroid conditions may make getting pregnant impossible.

Did you know?

Disorders that may affect pharmacodynamics include genetic mutations, malnutrition, thyrotoxicosis, myasthenia gravis, Parkinson's disease, and certain forms of insulin-resistant diabetes mellitus.

Did you know?

Interferon was scarce and expensive until 1980, when the interferon gene was inserted into bacteria using recombinant DNA technology, allowing for mass cultivation and purification from bacterial cultures.

Did you know?

The people with the highest levels of LDL are Mexican American males and non-Hispanic black females.

Did you know?

Drug abusers experience the following scenario: The pleasure given by their drug (or drugs) of choice is so strong that it is difficult to eradicate even after years of staying away from the substances involved. Certain triggers may cause a drug abuser to relapse. Research shows that long-term drug abuse results in significant changes in brain function that persist long after an individual stops using drugs. It is most important to realize that the same is true of not just illegal substances but alcohol and tobacco as well.

For a complete list of videos, visit our video library