Sensation And Perception Homework Worksheet (Page 2 of 4) in pdf

10. The neural signals produced in the rods and cones activate the neighboring

__________________________ cells, which then activate a network of

___________________________ cells. The axons of ganglion cells converge to form the

_________________________________

___________________________ which carries the visual

information to the _______________________________________.

11. Most cones are clustered around the retina’s point of central focus, called the

_____________________, whereas the rods are concentrated in more

___________________________ regions of the retina. Many cones have their own

________________________ to communicate with the visual cortex.

12. Visual information percolates through progressively more ___________________________ levels. In

the brain, it is routed by the ______________________________________ to higher-level brain areas

Hubel and Wiesel discovered that certain neurons in the ___________________________

__________________________ of the brain’s ____________________________________ lobe

respond only to specific features of what is viewed. They called these neurons

_____________________________

________________________________.

13. An object appears to be red in color because it ______________________________ the long

wavelengths of red and because of our mental ________________________________ of the color.

14. According to the _________________________-_____________________________

______________________________ theory, the eyes have three types of color receptors: one reacts

most strongly to ___________________________________, one to _________________________,

and one to ______________________________.

15. The stimulus for hearing, or _____________________________, is sound waves, created by the

compression and expansion of ___________________________________

________________________________.

16. The frequency of a sound wave determines the _____________________________ we perceive.

17. Sound energy is measured in units called ____________________________. The absolute threshold

for hearing is arbitrarily defined as ____________________________ such units.

18. In the inner ear, a coiled, bony, fluid-filled tube called the _______________________________

contains the receptor cells for hearing. The incoming vibrations cause the _______________________

__________________________ to vibrate the fluid that fills the tube, which causes ripples in the

_______________________________

__________________________________, bending the

________________________________ _________________________________ that line its surface.

This movement triggers impules in the adjacent nerve cells that converge to form the auditory nerve,

which carries the neural messages (via the _______________________) to the

______________________ lobe’s auditory cortex.

19. We locate a sound by sensing differences in the ______________________________ and

______________________ with which it reaches our ears.

Sensation And Perception Homework Worksheet Page 2