Fundamentals of Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134477336
Author: Martini
Publisher: PEARSON
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Textbook Question
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
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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- At sunset your visual system adapts to (a) fovea centralis vision. (b) rod-based vision. (c) macular vision. (d) cone-based vision.arrow_forwardWhen 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_forward
- Blindsight 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_forwardIn the brain, taste information is not transmitted through the (a) insula lobe, (b) solitary nucleus, (c) superior colliculus, (d) thalamus.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_forward
- Paralysis of a medial rectus muscle would affect (a) accommodation,(b) refraction, (c) depth perception, (d) pupil constriction.arrow_forward1) The maculae of the utricle and saccule with their embedded otoliths and the semicircular canals _______. A) detect changes in the rate at which the head is moving B) determine what direction a sounds are coming from C) amplify soft sounds to improve hearing D) can only detect motion if the head moves at a constant velocityarrow_forwardAnatomically, what causes a blind spot on the retina?arrow_forward
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