Exam 2: The Beginnings of Perception

Using words and/or diagrams, circuits with (a) no convergence; (b) convergence; and (c) convergence with inhibition affect neural firing rate.

Reading the eye chart in an optometrist's office is used to measure

Lorelei's mother is 60 years old. Because of the condition called ______, the closest distance at which she can focus an object is probably about ____ cm.

Describe the process of synaptic transmission. Include in this description the differences between excitatory and inhibitory transmitters.

Synaptic vesicles contain chemicals called _________ that are released across the synapse to the next neuron.

Which of the following statements best defines the "propagated response"?

A wavelength of 100 nm would fall in the ______ range of the electromagnetic spectrum.

The difference in charge between the inside and the outside of the nerve fiber when the nerve is at rest is _____ mV.

The flow of ions that create the action potential are caused by the changes in the ______ of the nerve fiber.

The difficulty of reading under dim light conditions can be explained by

The upper limit of a neuron's firing rate is estimated to be ____ impulses per second.

When visual pigments become bleached they are

The stimuli used in the preferential looking technique of testing infant acuity are

The structure of the eye that provides about 80% of the eye's focusing power is the

If we compare how the rods and cones converge onto other retinal neurons, we find that

____________ is the process by which inhibitory transmitters cause the inside of the neuron to become more negative.

A retinal condition that destroys the cones in the fovea is

Individual suffering from myopia may have difficulty seeing _______ objects clearly. Often times they are also referred to as being _______.

The rate of firing of the postsynaptic neuron depends on the amount of ______ input it receives from the presynaptic neuron.

To isolate the rod portion of the dark adaptation curve, researchers