This question asks you about a typical neuron and NOT photoreceptors. As stimulus intensity is increased, recording from a single neuron USUALLY shows the amplitude of the action potential increases. the amplitude of the action potential decreases. the amplitude of the action potential may increase or decrease, depending on the stimulus. the rate of firing of the nerve fiber increases. 2. An inhibitory transmitter _______ the firing rate of a neuron and an excitatory transmitter ________ the firing rate. increases; decreases increases; increases decreases; decreases decreases; increases

This question asks you about a typical neuron and NOT photoreceptors. As stimulus intensity is increased, recording from a single neuron USUALLY shows the amplitude of the action potential increases. the amplitude of the action potential decreases. the amplitude of the action potential may increase or decrease, depending on the stimulus. the rate of firing of the nerve fiber increases. 2. An inhibitory transmitter _ the firing rate of a neuron and an excitatory transmitter __ the firing rate. increases; decreases increases; increases decreases; decreases decreases; increases

Anatomy & Physiology

1st Edition

ISBN:9781938168130

Author:Kelly A. Young, James A. Wise, Peter DeSaix, Dean H. Kruse, Brandon Poe, Eddie Johnson, Jody E. Johnson, Oksana Korol, J. Gordon Betts, Mark Womble

Publisher:Kelly A. Young, James A. Wise, Peter DeSaix, Dean H. Kruse, Brandon Poe, Eddie Johnson, Jody E. Johnson, Oksana Korol, J. Gordon Betts, Mark Womble

Chapter16: The Neurological Exam

Section: Chapter Questions

Problem 6ILQ: Watch this video (http://openstaxcollege.org/l/2point) to see a quick demonstration of two-point...

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My question is The 2 types of photoreceptors cells within the retina are ______________ and _____________. These cells express a specialized G-protein coupled receptor which converts light into an electrical signal through the isomerization of ________________.
Photoreceptors in the retina have special channels that are open to Na+ in the dark. When light hits photoreceptors, these special channels close. What can you cònclude from this? None of the above O Photoreceptors hyperpolarize to light Photoreceptors depolarize to light Photoreceptor voltage does not change in the presence of light
When photoreceptors are activated, they synapse with ___________ cells, which then relay to ____________ cells. Question options: A bipolar; amacrine B ganglion; horizontal C bipolar; ganglion D ganglion; bipolar
Put the following steps in order for transduction for vision. Question options: PDE breaks down cyclic GMP Photon is absorbed by discs the photoreceptor hyperpolarizes Sodium channels are inactivated and the dark current stops Opsin is activated Phosphodiesterase (PDE) is activated Transducin is activated
The membrane potential of cells within the visual system is recorded in the dark, then following a brief flash of light. During the flash of light you would expect __________ cells to _____________ a rod cell; hyperpolarize b bipolar cell; depolarize c ganglion cell; depolarize d all of the above are correct
When moved from darkness to light, the potential generated in photoreceptors is a ___1.choose your answer___. Specifically, this potential change is brought on in part by the PDE break down of ___2.choose your answer___ to ____3.choose your answer___, which then causes the ___4.choose your answer___ of __5.choose your answer__ channels. 1.Hyper polarization or repolarization or depolarization 2.GMP or cGMP 3.cGMP or GMP 4.opening or closure 5.sodium or calcium or potassium
In the dark, Question options: A the photoreceptor does nothing, therefore the bipolar cells are inhibited. B the photoreceptor depolarizes and releases glutamate onto bipolar cells, stimulating them. C the photoreceptor hyperpolarizes and stops releasing glutamate onto bipolar cells, which in turn stimulate the ganglion cells. D the photoreceptor depolarizes and releases glutamate onto bipolar cells, inhibiting them.
Select the options that properly describe the function and features of cone cones can see red, glue and green. A A bright blue light would stimulate rods more than cones. O In low light conditions cones perceive color as gray cale. O In low light conditions cones perceive color as blue scale. O cones view low light conditions in grayscale. O cones are sensitive to bright light conditions.
In the light, Question options: A the photoreceptor does nothing, therefore the bipolar cells are inhibited. B the photoreceptor hyperpolarizes and stops releasing glutamate onto bipolar cells, which in turn stimulate the ganglion cells. C the photoreceptor depolarizes and releases glutamate onto bipolar cells, stimulating them. D the photoreceptor depolarizes and releases glutamate onto bipolar cells, inhibiting them.
Under which condition would the release of neurotransmitter by bipolar cells attached to cones be greatest? Group of answer choices focusing intently on a close object focusing intently on a distant object under normal room light immediately after going outside in bright sunlight in a pitch-black room after 30 minutes
Select the options that properly describe the function and features of rods. The absorbance of rhodopsin in the rods is much more sensitive than in the cone opsins. O The absorbance of rhodopsin in the cones is much more sensitive than in the rods opsins. sensitive to bright light conditions. O Rods are sensitive to vision in bright light conditions. O In low light conditions rods perceive color as blue scale. O In low light conditions rods perceive color as gray cale. O sensitive to low light conditions. Rods are sensitive to low light conditions. OA bright blue light would stimulate rods more than cones. O Rods are sensitive to vision in low light conditions. OLow light conditions are viewed in blue scale. Rods are sensitive to bright light conditions.
The discharge rate of an off-center ganglion cell: is not an absolute measure of light intensity does not depend on the background level of illumination O is highest when receptive field is in complete darkness O is the same for center-only and center-plus-surround illumination Which of the following terms are most suitably matched? Pitch, waveform Loudness, amplitude Frequency, pressure Tonotopy, phase

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		the amplitude of the action potential increases.
		the amplitude of the action potential decreases.
		the amplitude of the action potential may increase or decrease, depending on the stimulus.
		the rate of firing of the nerve fiber increases.

		increases; decreases
		increases; increases
		decreases; decreases
		decreases; increases