Textbook Question
Cerebrospinal fluid is formed by
a. Arachnoid granulations
b. Dura mater
c. Choroid plexuses
d. All of these
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Ch. 12 The Central Nervous System
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
Chapter 12, Problem 6
Fiber tracts that allow neurons within the same cerebral hemisphere to communicate are:
a. Association fibers
b. Commissures
c. Projection fibers
Verified step by step guidance1
Step 1: Understand the types of fiber tracts in the brain. Fiber tracts are bundles of axons that connect different parts of the brain, allowing communication between neurons.
Step 2: Identify the function of association fibers. Association fibers connect different regions within the same cerebral hemisphere, enabling communication between neurons in that hemisphere.
Step 3: Recognize the role of commissural fibers (commissures). These fibers connect corresponding areas between the two cerebral hemispheres, allowing interhemispheric communication.
Step 4: Understand projection fibers. Projection fibers connect the cerebral cortex with lower parts of the brain and spinal cord, facilitating communication between the cortex and other parts of the nervous system.
Step 5: Based on these definitions, determine which fiber tract type allows communication within the same cerebral hemisphere by matching the description to the correct term.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Association Fibers
Association fibers are bundles of axons that connect different regions within the same cerebral hemisphere, enabling communication between neurons in those areas. They facilitate integration of information locally without crossing to the opposite hemisphere.
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Protein Fibers
Commissures
Commissures are fiber tracts that connect corresponding areas of the two cerebral hemispheres, allowing communication between the left and right sides of the brain. The corpus callosum is the largest and most well-known commissure.
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Projection Fibers
Projection fibers link the cerebral cortex with lower brain regions and the spinal cord, transmitting signals between the brain and the rest of the body. They do not connect areas within the same hemisphere or between hemispheres.
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Related Practice
Textbook Question
A professor unexpectedly blew a loud horn in his anatomy and physiology class. The students looked up, startled. The reflexive movements of their eyes were mediated by the:
a. Cerebral cortex
b. Inferior olives
c. Raphe nuclei
d. Superior colliculi
e. Nucleus gracilis
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Textbook Question
Choose the correct term from the key to respond to the statements describing various brain areas.
Key:
a. Cerebellum
b. Corpora quadrigemina
c. Corpus callosum
d. Striatum
e. Hypothalamus
f. Medulla
g. Midbrain
h. Pons
i. Thalamus
________ (1) basal nuclei involved in fine control of motor activities
________ (2) region where there is a crossover of fibers of descending pyramidal tracts
________ (3) control of temperature, autonomic nervous system reflexes, hunger, and water balance
________ (4) houses the substantia nigra and cerebral aqueduct
________ (5) relay stations for visual and auditory stimuli input; found in midbrain
________ (6) houses vital centers for control of the heart, respiration, and blood pressure
________ (7) brain area through which all the sensory input is relayed to get to the cerebral cortex
________ (8) brain area most concerned with equilibrium, body posture, and coordination of motor activity
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Textbook Question
a. What is the function of the basal nuclei?
b. Which basal nuclei form the striatum?
c. Which arches over the diencephalon?
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Textbook Question
List four ways in which the CNS is protected.
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Textbook Question
Destruction of the ventral horn cells of the spinal cord results in loss of
a. Integrating impulses
b. Sensory impulses
c. Voluntary motor impulses
d. All of these
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