Fundamentals of Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134396026
Author: Frederic H. Martini, Judi L. Nath, Edwin F. Bartholomew
Publisher: PEARSON
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Chapter 17, Problem 3RQ
A blind spot occurs in the retina where (a) the fovea centralis is located, (b) ganglion cells synapse with bipolar cells, (c) the optic nerve attaches to the retina, (d) rod cells are clustered to form the macula, (e) amacrine cells are located.
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You are watching the stars at night, and you never seem to be looking at the right spot to catch the brightest meteors. Which of the following might explain this?
a)Your fovea contains mostly cones; thus you see dim light especially well when looking right at it.
b)Your peripheral retina contains more rods, which are more sensitive to dim light than cones; thus objects in your peripheral vision appear brighter in dim light situations.
c)Detection of light depends mostly on its color rather than intensity; thus cones play a larger role in detection of light in dim light situations.
d) all of the above.
( well explain the correct answer and type answer).
Which of the following statements are true regarding the fovea centralis of the eye?
A) 100% cones
B) 100% rods
C) 50% rods and 50% cones
D) 0% rods or cones - blind spot
E)located in the central portion of the lens
Describe how the pupil reacts to the following changes in conditions:(a) Sudden increase in brightness(b) Gradual dimming of light until it is almost dark(c) Looking at a kite, then down at your hand to let out string(d) When a person die(e) There’s a compressed cranial nerve 3
Chapter 17 Solutions
Fundamentals of Anatomy & Physiology (11th Edition)
Ch. 17 - Prob. 1CPCh. 17 - Prob. 2CPCh. 17 - Prob. 3CPCh. 17 - Prob. 4CPCh. 17 - If you completely dry the surface of your tongue...Ch. 17 - Prob. 6CPCh. 17 - Prob. 7CPCh. 17 - Prob. 8CPCh. 17 - Prob. 9CPCh. 17 - Prob. 10CP
Ch. 17 - Prob. 11CPCh. 17 - Prob. 12CPCh. 17 - Prob. 13CPCh. 17 - Prob. 14CPCh. 17 - Prob. 15CPCh. 17 - Prob. 16CPCh. 17 - Prob. 17CPCh. 17 - Prob. 1RQCh. 17 - Prob. 2RQCh. 17 - A blind spot occurs in the retina where (a) the...Ch. 17 - Sound waves are convened into mechanical movements...Ch. 17 - The basic receptors in the internal ear are the...Ch. 17 - Prob. 6RQCh. 17 - At sunset, your visual system adapts to (a) fovea...Ch. 17 - Prob. 8RQCh. 17 - The malleus, incus, and stapes are the tiny bones...Ch. 17 - Identify the structures of the external, middle,...Ch. 17 - Prob. 11RQCh. 17 - Prob. 12RQCh. 17 - Prob. 13RQCh. 17 - Prob. 14RQCh. 17 - Prob. 15RQCh. 17 - Prob. 16RQCh. 17 - Prob. 17RQCh. 17 - Prob. 18RQCh. 17 - Prob. 19RQCh. 17 - Prob. 20RQCh. 17 - Prob. 21RQCh. 17 - Prob. 22RQCh. 17 - Prob. 23RQCh. 17 - Prob. 24RQCh. 17 - Prob. 25RQCh. 17 - Prob. 26RQCh. 17 - Prob. 27RQCh. 17 - Prob. 28RQCh. 17 - Prob. 1CCCh. 17 - Prob. 2CC
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- The optic nerves form synapses in the ____ nucleus of the thalamus, which relays the information to the primary visual cortex in the ___ lobes. A) medial geniculate; parietal B) medial geniculate; occipital C) lateral geniculate; occipital D) lateral geniculate; parietalarrow_forwardDamage to the right optic nerve would result in what type of visual field deficit? Question 6 options: A) Blindness in the majority of the left visual field (both binocular and monocular) B) Blindness in the majority of the right visual field (both binocular and monocular) C) Blindness in the majority of both monocular visual fields D) Blindness in the binocular visual field E) Blindness in the majority of the right monocular visual field F) Blindness in the majority of the left monocular visual fieldarrow_forwardAt sunset your visual system adapts to (a) fovea centralis vision. (b) rod-based vision. (c) macular vision. (d) cone-based vision.arrow_forward
- When the ciliary muscle is contracted, the following will: a) lens to become more spherical b) pupil to be dilated c) pupil to contract d) the lens to be flattenedarrow_forwardThree patients have suffered destruction of different portions of their visual pathway. Patient 1 has lost the right optic tract, patient 2 has lost the nerve fibers that cross at the optic chiasm, and patient 3 has lost the left occipital lobe. Draw a picture of what each person would perceive through each eye when looking at a white wall.arrow_forwardBlindsight is the condition in which someone with damage in the primary visual cortex reports that they cannot see an object, but can usually guess what that object is. This means that some visual representation must reach the frontal speech area. What non-thalamic pathway might do that? Question 8 options: A) The pathway through the suprachiasmatic nucleus B) The dorsal visual pathway C) The pathway through the superior colliculus D) The magnocelluar or M pathwayarrow_forward
- Conduction of sound from the middle ear to the internal ear occurs via vibration of the (a) malleus against the tympanic membrane, (b) stapes in the oval window, (c) incus in the round window, (d) tympanic membrane against the stapes.arrow_forwardEven though they are located in the back of the retinal tissue, what is the importance of the rod and cone photoreceptor cells to our sense of sight? (explain elaborately)arrow_forwardA light ray passes through the refractory structures of the eye in this order: (a) vitreous humor, lens, aqueous humor, cornea; (b) cornea, aqueous humor, lens, vitreous humor; (c) cornea, vitreous humor, lens, aqueous humor; (d) lens, aqueous humor, cornea, vitreous humor.arrow_forward
- Regarding the eye's adaptation to darkness: a) then it happens faster than the eye's light adaptation b) so the pupils contract c) then the amount of rhodopsin increases d) No answer text provided.arrow_forwardIn the brain, taste information is not transmitted through the (a) insula lobe, (b) solitary nucleus, (c) superior colliculus, (d) thalamus.arrow_forwardplease select all correct options In the eye A) contraction of the ciliary muscles decreases the curvature of the lens. B) lateral inhibition by horizontal cells increases visual contrast. C) there are more cones in the fovea of the retina than there are rods. D) the rods take less than three minutes to fully adapt to dim illumination. E) visual acuity is best at the optic disc.arrow_forward
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