Explain the differences between the rods and cones in the retina
What will be an ideal response?
There are about 120 million rods and 6 million cones in each retina. Cones provide for color vision but are less sensitive to light. Rods provide for vision in dim light and for peripheral vision, especially for moving objects. Cones also allow for detecting fine detail. Cones are concentrated in the fovea and become fewer as you move away from the fovea. Rods are absent in the fovea and increase in number as you move away. The blind spot has no rods or cones; therefore, images formed on the blind spot cannot be seen.
You might also like to view...
Class rank is to the _____ scale of measurement and weight is to the _____ scale of measurement
a. ordinal; ratio b. ordinal; nominal c. nominal; interval d. interval; ratio
A friend of yours is interested in getting a graduate degree and eventually becoming a clinical psychologist
She wants her education to focus almost exclusively on the practice of clinical psychology, and to include very little research or scientific training. Which type of graduate degree programs should she apply to? A) PhD B) PsyD C) MD D) EdD
You classically condition your dog Milo to salivate when middle C is played on the piano, but you find that he also salivates when a high G is played
You make a point of playing high G and not giving Milo any food afterward, whereas you do give him food after you play C. After a few days, Milo stops salivating when high G is played but continues to salivate to middle C. This phenomenon is known as ________________. A) generalization B) discrimination C) bitonal judgment D) spontaneous recovery
Some researchers now believe that one of the keys to the development of schizophrenia lies in the process of synaptic pruning? Which of the following illustrates this term?
a) High levels of dopamine reduce the number of dendrites in the brain. b) Neurons selectively reduce the number of branches of their dendrites. c) Antipsychotic drugs may reduce schizophrenic symptoms but they also adversely affect the number of dendrites. d) Destruction of certain neural pathways make it possible for the brain to experience hallucinations that occurs in schizophrenia.