Textbook Question
Mark the following statements as true or false. If the statement is false, correct it to make it a true statement.
Aggregates of Golgi apparatus and lysosomes form dark-staining Nissl bodies within the cell body.
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Ch. 12 The Central Nervous System
Amerman2nd EditionHuman Anatomy & PhysiologyISBN: 9780136873822
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Table of contents
- Ch. 1 Introduction to Anatomy and Physiology26
- Ch. 2 The Chemistry of Life38
- Ch. 3 The Cell55
- Ch. 4 Histology47
- Ch. 5 The Integumentary System30
- Ch. 6 Bones and Bone Tissue36
- Ch. 7 The Skeletal System40
- Ch. 8 Articulations19
- Ch. 9 The Muscular System36
- Ch. 10 Muscle Tissue and Physiology29
- Ch. 11 Introduction to the Nervous System and Nervous Tissue28
- Ch. 12 The Central Nervous System42
- Ch. 13 The Peripheral Nervous System41
- Ch. 14 The Autonomous Nervous System and Homeostasis31
- Ch. 15 The Special Senses39
- Ch. 16 The Endocrine System42
- Ch. 17 The Cardiovascular System I: The Heart30
- Ch. 18 The Cardiovascular System II: The Blood Vessels43
- Ch. 19 Blood32
- Ch. 20 The Lymphatic System and Immunity45
- Ch. 21 The Respiratory System27
- Ch. 22 The Digestive System27
- Ch. 23 Nutrition and Metabolism7
- Ch. 24 The Urinary System39
- Ch. 25 Fluids, Electrolytes, and Acid-Base Homeostasis39
- Ch. 26 The Reproductive System10
- Ch. 27 Development and Heredity5
Chapter 12, Problem 4c
Mark the following statements as true or false. If the statement is false, correct it to make it a true statement.
Axons arise from the axon hillock.
Verified step by step guidance1
Step 1: Understand the anatomy of a neuron. A neuron consists of three main parts: the cell body (soma), dendrites, and axon. The axon is responsible for transmitting electrical signals away from the cell body.
Step 2: Recall the structure of the axon hillock. The axon hillock is a specialized region of the neuron where the axon originates. It is located at the junction between the cell body and the axon.
Step 3: Evaluate the statement: 'Axons arise from the axon hillock.' Based on the anatomy of a neuron, this statement is true because the axon hillock is indeed the site where the axon begins.
Step 4: If the statement were false, you would need to correct it. For example, if the statement incorrectly said 'Axons arise from dendrites,' you would correct it to 'Axons arise from the axon hillock.'
Step 5: Conclude that the statement as given is true and does not require correction. This reinforces your understanding of the relationship between the axon and the axon hillock.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Axon Structure
An axon is a long, slender projection of a neuron that conducts electrical impulses away from the neuron's cell body. It is essential for transmitting signals to other neurons, muscles, or glands. The axon hillock is the specialized region where the axon begins, playing a critical role in the initiation of action potentials.
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Structure of the Eyeball Example 1
Neuron Anatomy
Neurons are the fundamental units of the nervous system, consisting of three main parts: the cell body (soma), dendrites, and axon. The cell body contains the nucleus and organelles, while dendrites receive signals from other neurons. Understanding neuron anatomy is crucial for grasping how signals are processed and transmitted in the nervous system.
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Action Potential
An action potential is a rapid, temporary change in the electrical membrane potential of a neuron, allowing it to transmit signals. It is initiated at the axon hillock when the membrane potential reaches a certain threshold. This concept is vital for understanding how neurons communicate and how information is relayed throughout the nervous system.
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Related Practice
Textbook Question
Mark the following statements as true or false. If the statement is false, correct it to make it a true statement.
Substances can move toward or away from the cell body through the axon via fast axonal transport.
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Textbook Question
Which statement about cerebral white matter is false?
a. Commissural fibers connect the right and left cerebral hemispheres.
b. Projection fibers connect the cerebral cortex of one hemisphere with structures in the other hemisphere.
c. The corpus callosum is the largest bundle of white matter in the brain.
d. Association fibers connect the gyri of the cerebral cortex with one another.
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Textbook Question
An axon is best defined as a process that:
a. Transmits signals only toward the cell body.
b. Can generate action potentials.
c. Transmits signals only away from the cell body.
d. Cannot generate action potentials
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Textbook Question
Mark the following statements about the cerebral cortex as true or false. If a statement is false, correct it to make a true statement.
The neocortex is the 'newest' component of the cerebral cortex from an evolutionary perspective.
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Textbook Question
Mark the following statements as true or false. If the statement is false, correct it to make it a true statement.
The axon contains a high density of ribosomes, rough endoplasmic reticulum, and Golgi apparatus.
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