Human Biology (MindTap Course List)
Human Biology (MindTap Course List)
11th Edition
ISBN: 9781305112100
Author: Cecie Starr, Beverly McMillan
Publisher: Cengage Learning
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Chapter 14, Problem 8SQ

Rods differ from cones in the following ways:

  1. a. They detect dim light, not bright light.
  2. b. They have a different visual pigment.
  3. c. They are not located in the retina.
  4. d. All of the above.
  5. e. a and b only
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Which of the following statements aboutphotopic vision is false?a. It is mediated by the cones.b. It has a low threshold.c. It produces fine resolution.d. It does not function in starlight.e. It does not employ rhodopsin.
Which one of the following statements about photoreception is true? a. Light detection is initiated by the absorbance of light (a photon) by a photopigment molecule. b. Light detection is synonomous with vision. c. Light detection is always initiated in a rod photoreceptor located in the retina. d. Only light in the visible range (between 400 and 700 nm wavelength) can be detected by animals. e. None of the above answer choices (neither A, nor B, nor C, nor D) is true.
Which of the following statements explains why vision is less sharp in dim light than in bright light?a. Cones are more responsive in dim light.b. There are more rods than cones in the eye.c. Many rods converge on a single ganglion.d. The dilated pupil lets in more light than the lens can focus.

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Human Biology (MindTap Course List)

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Visual Perception – How It Works; Author: simpleshow foundation;https://www.youtube.com/watch?v=DU3IiqUWGcU;License: Standard youtube license