Textbook Question
The portion of the fibrous layer that is white and opaque is the
a. Choroid
b. Cornea
c. Retina
d. Sclera
2
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Ch. 13 The Peripheral Nervous System and Reflex Activity
Marieb, Hoehn7th EditionHuman Anatomy & PhysiologyISBN: 9780805359091
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Table of contents
- Ch. 1 The Human Body: An Orientation24
- Ch. 2 Chemistry Comes Alive25
- Ch. 3 Cells: The Living Units24
- Ch. 4 Tissue: The Living Fabric19
- Ch. 5 The Integumentary System10
- Ch. 6 Bones and Skeletal Tissues19
- Ch. 7 The Skeleton11
- Ch. 8 Joints7
- Ch. 9 Muscles and Muscle Tissue26
- Ch. 10 The Muscular System26
- Ch. 11 Fundamentals of the Nervous System and Nervous Tissue23
- Ch. 12 The Central Nervous System26
- Ch. 13 The Peripheral Nervous System and Reflex Activity28
- Ch. 14 The Autonomic Nervous System18
- Ch. 16 The Endocrine System26
- Ch. 17 Blood27
- Ch. 18 The Cardiovascular System: The Heart22
- Ch. 19 The Cardiovascular System: Blood Vessels27
- Ch. 20 The Lymphatic System and Lymphoid Organs and Tissues16
- Ch. 21 The Immune System: Innate and Adaptive Body Defenses29
- Ch. 22 The Respiratory System20
- Ch. 23 The Digestive System30
- Ch. 24 Nutrition, Metabolism, and Energy Balance26
- Ch. 25 The Urinary System25
- Ch. 26 Fluid, Electrolyte, and Acid-Base Balance24
- Ch. 27 The Reproductive System23
Marieb, Hoehn7th EditionHuman Anatomy & PhysiologyISBN: 9780805359091Not the one you use?Change textbook
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Marieb, Hoehn 7th EditionCh. 13 The Peripheral Nervous System and Reflex ActivityProblem 11
Marieb, Hoehn 7th EditionCh. 13 The Peripheral Nervous System and Reflex ActivityProblem 11Chapter 13, Problem 11
Of the neurons in the retina, the axons of which of these form the optic nerve?
a. Bipolar cells
b. Ganglion cells
c. Cone cells
d. Horizontal cells
Verified step by step guidance1
Step 1: Understand the structure of the retina and the types of neurons it contains. The retina has several types of neurons including photoreceptor cells (rods and cones), bipolar cells, ganglion cells, horizontal cells, and amacrine cells.
Step 2: Identify the role of each neuron type. Photoreceptor cells (rods and cones) detect light and convert it into electrical signals. Bipolar cells receive signals from photoreceptors and transmit them to ganglion cells. Horizontal cells help integrate and regulate input from multiple photoreceptors. Ganglion cells receive input from bipolar cells and are responsible for transmitting visual information to the brain.
Step 3: Recall that the optic nerve is formed by the axons of the neurons that carry visual information from the retina to the brain. Among the retinal neurons, only the ganglion cells have axons that extend out of the retina to form the optic nerve.
Step 4: Therefore, the axons of the ganglion cells converge to form the optic nerve, which transmits visual signals to the brain for processing.
Step 5: Conclude that the correct answer is the ganglion cells, as their axons form the optic nerve.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Retinal Neuron Types
The retina contains several types of neurons including photoreceptors (rods and cones), bipolar cells, ganglion cells, horizontal cells, and amacrine cells. Each type has a specific role in processing visual information before it is transmitted to the brain.
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The Neuron
Ganglion Cells and the Optic Nerve
Ganglion cells are the final output neurons of the retina. Their axons bundle together to form the optic nerve, which carries visual information from the eye to the brain for processing.
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Function of Bipolar, Cone, and Horizontal Cells
Bipolar cells transmit signals from photoreceptors to ganglion cells, cone cells are photoreceptors responsible for color vision, and horizontal cells integrate and regulate input from multiple photoreceptors. None of these cells' axons form the optic nerve.
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Related Practice
Textbook Question
Accessory glands that produce an oily secretion are the
a. Conjunctiva
b. Lacrimal glands
c. Tarsal glands
2
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Textbook Question
Olfactory nerve filaments are found
a. In the optic bulbs
b. Passing through the cribriform plate of the ethmoid bone
c. In the optic tracts
d. In the olfactory cortex
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Textbook Question
Which sequence best describes a normal route for the flow of tears from the eyes into the nasal cavity?
a. Lacrimal canaliculi, lacrimal sacs, nasolacrimal ducts
b. Lacrimal ducts, lacrimal canaliculi, nasolacrimal ducts
c. Nasolacrimal ducts, lacrimal canaliculi, lacrimal sacs
Textbook Question
Which of the following statements does not correctly describe the spiral organ?
a. Sounds of high frequency stimulate hair cells at the basal end.
b. The 'hairs' of the receptor cells are embedded in the tectorial membrane.
c. The basilar membrane acts as a resonator.
d. The more numerous outer hair cells are largely responsible for our perception of sound.
Textbook Question
Taste buds are found on the
a. Anterior part of the tongue
b. Posterior part of the tongue
c. Palate
d. All of these
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