• Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off
Reading...
Front

Card Range To Study

through

image

Play button

image

Play button

image

Progress

1/13

Click to flip

Use LEFT and RIGHT arrow keys to navigate between flashcards;

Use UP and DOWN arrow keys to flip the card;

H to show hint;

A reads text to speech;

13 Cards in this Set

  • Front
  • Back
Objective

Summarize the law of specific nerve energies.
It states that whatever excites a particular nerve establishes a special kind of energy unique to that nerve.

In other words, any activity by a particular nerve always conveys the same kind of information to the brain.
Objective

Describe the route that visual information travels in the eye.
Light enters the eye through the pupil.
The pupil is focused by the lens (adjustable) and cornea (not adjustable) and projected onto the retina, the near surface of the eye, which is lined with visual receptors.
The receptors send their messages to bipolar cells, neurons located closer to the center of the eye. The ganglion cell axons band together to from the optic nerve--an axon bundle that exits through the back of the eye.
Objective

Distinguish between foveal and peripheral vision.
See study guide.
receptor potential
A local depolarization or hyperpolarization of a receptor membrane
Law of Specific Nerve Energies
States that whatever excites a particular nerve establishes a special kind of energy unique to that nerve
Any activity by a particular nerve always conveys the same kind of information to the brain
pupil
Opening in the center of the iris
Controls light entrance
retina
Rear surface of the eye
Lined with visual receptors
bipolar cell
Neurons located closer to the center of the eye
Send messages to the ganglion cells
ganglion cell
Cells located still closer to the center of the eye
Project axons to optic nerve
optic nerve
An axon bundle that exits through the back of the eye
blind spot
Point at which the optic nerve leaves (which is also where the major blood vessels leave)
Has no receptors
fovea
Central portion of the retina specialized for acute, detailed vision
Contains only cones
midget ganglion cells
Small ganglion cells that respond to a single cone