Ch 14 Homework Flashcards Preview

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Flashcards in Ch 14 Homework Deck (14):
1

Integration must occur for all ______ signals to be summed before sensory receptors ______ nerve signals.

Incoming, initiate

2

Sensory adaptation, one specific type of integration, is a(n) ______ in response to a stimulus.

Decrease

3

An example of this type of integration allows for humans to stop responding to a stimulus that isn't of ______ importance.

Immediate

4

Nocireceptors are pain receptors located ______.

In internal organs

5

They are sensitive to ______ released by damaged tissues.

Chemicals

6

These receptors may react to signals initiated by mechanical, thermal, or electric stimuli as well as ______ substances.

Toxic

7

The ______, with the help of the lens and the humors, focuses images on the ______.

Cornea, retina

8

Visual ______ occurs for close vision, as the lens changes its shape to bring the image into ______.

Accomodation, focus

9

The changes in the lens are brought on by contraction of the ______.

Ciliary muscle

10

The human retina contains photoreceptors called rods and cones. Rod cells contain a complex, dark violet-colored pigment called ______.

Rhodopsin

11

This complex molecule is composed of two molecules: a light-absorbing molecule called retinal and a protein called ______. Retinal is a derivative of vitamin A.

Opsin

12

We see ______ in the dark because rods are sensitive to light but do not detect color. Cones are sensitive to different ______ of light and are important in color vision and fine detail.

Shades of gray, wavelengths

13

Cones contain three different pigments: B9blue), G (green), and ______. Each of these pigments is made up of retinal and an opsin.

R (red)

14

Both rod and cone cells synapse with the ______ cells, which in turn synapse with ganglion cells whose axons become the ______ nerve.

Bipolar, optic