Week 4 - Quiz Flashcards
(30 cards)
What trait(s) is or are associated with cones of the retina?
a. Cones do not converge.
b. Cones have small receptive fields.
c. Cones provide detailed vision.
d. Cones perform color vision.
e. All of these options are traits associated with cones.
e. All of these options are traits associated with cones.
To assess visual acuity, what number in the equation represents the distance you as the patient must stand to observe standardized
detail?
a. Numerator (the top number).
b. Denominator (the bottom number).
a. Numerator (the top number).
What term describes a response that is on the same side as the stimulus.
a. Contralateral.
b. Consensual.
c. Ipsilateral.
d. Decussating.
c. Ipsilateral.
The left hemifield (visual field or field of view) projects to what tract?
a. Left optic tract.
b. Right optic tract.
b. Right optic tract.
What sequence of signaling between the cells of the retina will allow signals to be sent to the brain?
a. Rods send excitatory postsynaptic potentials causing bipolar cells to send excitatory postsynaptic potentials allowing ganglion
cells to send action potentials through the optic nerve to the brain.
b. Rods send action potentials causing bipolar cells to send excitatory postsynaptic potentials leading to ganglion cells to send
action potentials through the optic nerve to the brain.
c. Rods stop sending inhibitory postsynaptic potentials causing bipolar cells to send excitatory postsynaptic potentials allowing
ganglion cells to send action potentials through the optic nerve to the brain.
d. Rods send inhibitory postsynaptic potentials causing bipolar cells to send excitatory postsynaptic potentials allowing ganglion
cells to send action potentials through the optic nerve to the brain.
c. Rods stop sending inhibitory postsynaptic potentials causing bipolar cells to send excitatory postsynaptic potentials allowing
ganglion cells to send action potentials through the optic nerve to the brain.
Which form of visual adaptation takes longer? Though it is not in the question, can you explain why your answer is correct.
a. Dark adaptation as we go from light to dark.
b. Light adaptation as we go from dark to light.
a. Dark adaptation as we go from light to dark.
What two structures create the blind spot in our visual field?
a. Pupil and iris.
b. Fovea centralis and optic disc.
c. Optic nerve and optic disc.
d. Lens and fovea centralis.
e. Fovea centralis and optic nerve.
c. Optic nerve and optic disc.
Use page 20 of the PNS section of the packet as reference. Which branch of the nervous systems motor output only involves one neuron
to reach the target organs?
a. Somatic.
b. Parasympathetic.
c. Sympathetic.
a. Somatic.
Which form of vision is associated with zonular ligaments becoming slackened (loose).
a. Distance vision.
b. Close vision.
a. close vision
When a person is in complete darkness what is the shape (isomer form) of the visual pigment rhodopsin?
a. All-trans-retinal.
b. 11-cis-retinal.
b. 11-cis-retinal.
The right nasal hemiretina receives visual input from what portion of the visual field (hemifield)?
a. From the most peripheral left hemifield.
b. From the most medial hemifield, both right and left.
c. From the most peripheral hemifield of both right and left.
d. From the most peripheral right hemifield.
d. From the most peripheral right hemifield.
Identify the correct order of tunics of the eye from outer to innermost.
a. Vascular, fibrous, then sensory.
b. Fibrous, vascular, then sensory.
c. Sensory, fibrous, then vascular.
d. Sensory, vascular, then fibrous.
e. Fibrous, sensory, then vascular.
b. Fibrous, vascular, then sensory.
Damage to the optic chiasm would lead to what form of visual loss.
a. Loss of the most medial field of vision.
b. Loss of the most peripheral field of vision.
c. Loss of the right hemifield (visual field).
d. Loss of the left hemifield (visual field).
b. Loss of the most peripheral field of vision.
Which form of vision leads to greater eye fatigue?
a. Close vision.
b. Distance vision
a. Close vision.
What is the alternate term of the vascular tunic?
a. Choroid.
b. Iris.
c. Palpebrae.
d. Uvea.
e. Ciliary body.
d. Uvea.
Which branch of the autonomic nervous system facilitates pupil constriction?
a. Sympathetic nervous system.
b. Parasympathetic nervous system.
b. Parasympathetic nervous system.
If a person is right eye blind what portion of the visual pathway is damaged?
a. The right optic tract.
b. The left optic tract.
c. The right optic nerve.
d. The optic chiasm.
c. The right optic nerve.
When the rods are sending inhibitory postsynaptic potentials to bipolar cells what light condition is the individual being exposed to?
a. Low light.
b. Complete darkness.
b. Complete darkness.
Which form of vision is associated with zonular ligaments becoming taught.
a. Close vision.
b. Distance vision.
b. Distance vision.
If a person has visual acuity of 20/10, what interpretation is correct.
a. The person has worse than average vision because they must stand closer than average from a stimulus to see average detail.
b. The person has better than average vision because they can stand farther than average from a stimulus to see average detail.
b. The person has better than average vision because they can stand farther than average from a stimulus to see average detail.
Identify the one characteristic that does not apply to Rods photoreceptors.
a. Functions in peripheral vision.
b. Aids in monochromatic (i.e., not color) vision.
c. Many rods innervate (connect) with a single bipolar cell which is convergent organization.
d. Provides indistinct detail of visual stimuli.
e. Located in high density in the fovea centralis.
e. Located in high density in the fovea centralis.
Consider the process of phototransduction involving the second messenger system of rod cells. What is the specific name of the G
protein?
a. Transducin.
b. Phosphodiesterase.
c. Rhodopsin.
d. cyclic GMP (cGMP).
a. Transducin.
Which form of vision requires muscle contraction of ciliary muscles?
a. Distance vision.
b. Close vision.
b. Close vision.
What structure separates the anterior and posterior region of the human eye?
a. Cornea.
b. Lacrimal apparatus.
c. Palpebrae.
d. Lens.
e. Sclera.
d. Lens.
