Textbook Question
Identify and shade in the locations of all the ascending sensory tracts in the following diagram of the spinal cord.
Ch. 15 Sensory Pathways and the Somatic Nervous System
Martini, Nath, Bartholomew11th EditionFundamentals of Anatomy & PhysiologyISBN: 9780136874089
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Table of contents
- Ch. 1 An Introduction to Anatomy and Physiology26
- Ch. 2 The Chemical Level of Organization34
- Ch. 3 The Cellular Level of Organization30
- Ch. 4 The Tissue Level of Organization24
- Ch. 5 The Integumentary System17
- Ch. 6 Bones and Bone Structure36
- Ch. 7 The Axial Skeleton11
- Ch. 8 The Appendicular Skeleton17
- Ch. 9 Joints13
- Ch. 10 Muscle Tissue12
- Ch. 11 The Muscular System28
- Ch. 12 Nervous Tissue18
- Ch. 13 The Spinal Cord, Spinal Nerves, and Spinal Reflexes22
- Ch. 14 The Brain and Cranial Nerves20
- Ch. 15 Sensory Pathways and the Somatic Nervous System17
- Ch. 16 The Autonomic Nervous System and Higher-Order Functions30
- Ch. 17 The Special Senses16
- Ch. 18 The Endocrine System20
- Ch. 19 Blood31
- Ch. 20 The Heart31
- Ch. 21 Blood Vessels and Circulation29
- Ch. 22 The Lymphatic System and Immunity31
- Ch. 23 The Respiratory System12
- Ch. 24 The Digestive System18
- Ch. 26 The Urinary System31
- Ch. 27 Fluids & Electrolytes32
- Ch. 28 The Reproductive System12
- Ch. 29 Development and Inheritance23
Martini, Nath, Bartholomew11th EditionFundamentals of Anatomy & PhysiologyISBN: 9780136874089Not the one you use?Change textbook
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Martini, Nath, Bartholomew 11th EditionCh. 15 Sensory Pathways and the Somatic Nervous SystemProblem 2
Martini, Nath, Bartholomew 11th EditionCh. 15 Sensory Pathways and the Somatic Nervous SystemProblem 2Chapter 15, Problem 2
_______ receptors are normally inactive, but become active for a short time whenever there is a change in the modality that they monitor.
Verified step by step guidance1
Understand the question is asking about a type of receptor that is usually inactive but activates briefly when there is a change in the stimulus it monitors.
Recall that sensory receptors can be classified based on how they respond to stimuli: some respond continuously, while others respond only to changes.
Identify that receptors which respond only to changes in stimulus intensity or modality are called 'phasic receptors' or 'adaptation receptors'.
Phasic receptors quickly adapt to a constant stimulus and become inactive, but they fire impulses when the stimulus changes, signaling new information.
Therefore, the answer involves recognizing that these receptors are called 'phasic receptors' because they are normally inactive but activate briefly upon changes in the monitored modality.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Receptor Modality
Receptor modality refers to the specific type of stimulus a sensory receptor is sensitive to, such as light, sound, or pressure. Each receptor is specialized to detect changes in its particular modality, enabling the nervous system to interpret different environmental signals accurately.
Recommended video:
2:11
Sensory Receptor Classification by Modality
Phasic Receptors
Phasic receptors are sensory receptors that remain inactive when a stimulus is constant but become active briefly when there is a change in the stimulus. They are important for detecting changes or new events in the environment, such as the onset or removal of a stimulus.
Recommended video:
1:17Adaptation of Sensory Receptors Example 1
Sensory Adaptation
Sensory adaptation is the process by which sensory receptors reduce their response to a constant stimulus over time. This allows the nervous system to focus on new or changing stimuli, preventing overload from unchanging background information.
Recommended video:
1:17Adaptation of Sensory Receptors Example 1
Related Practice
Textbook Question
The larger the receptive field, the
(a) Larger the stimulus needed to stimulate a sensory receptor
(b) Fewer sensory receptors there are
(c) Harder it is to locate the exact point of stimulation
(d) Larger the area of the somatosensory cortex in the brain that deals with the area
(e) Closer together the receptor cells
Textbook Question
Identify six types of tactile receptors located in the skin, and describe their sensitivities.
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Textbook Question
The CNS interprets information entirely on the basis of the
(a) Number of action potentials that it receives
(b) Kind of action potentials that it receives
(c) Line over which sensory information arrives
(d) Intensity of the sensory stimulus
(e) Number of sensory receptors that are stimulated
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