Textbook Question
The lower motor neurons that innervate contractile skeletal muscle fibers are called:
a. α-motor neurons
b. β-motor neurons
c. upper motor neurons
d. γ-motor neurons
Ch. 13 The Peripheral Nervous System
Amerman2nd EditionHuman Anatomy & PhysiologyISBN: 9780136873822
Not the one you use?Change textbookSelect a different textbook
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 Autonomic 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 Metabolism and Nutrition7
- Ch. 24 The Urinary System39
- Ch. 25 Fluid, Electrolyte, and Acid-Base Homeostasis39
- Ch. 26 The Reproductive System10
- Ch. 27 Development and Heredity5
Chapter 13, Problem 15
______detect the degree to which a muscle is stretched, whereas______detect the force of a muscle contraction.
Verified step by step guidance1
Step 1: Understand the two types of sensory receptors involved in muscle function. Muscle spindles are specialized sensory receptors that detect the degree of stretch in a muscle, while Golgi tendon organs are sensory receptors that detect the force or tension generated during muscle contraction.
Step 2: Recall the anatomical location of these receptors. Muscle spindles are located within the muscle fibers themselves, specifically in the intrafusal fibers, whereas Golgi tendon organs are located at the junction between the muscle and its tendon.
Step 3: Consider the physiological role of each receptor. Muscle spindles provide feedback to the central nervous system about muscle length and changes in length, helping to regulate muscle tone and prevent overstretching. Golgi tendon organs monitor tension to prevent excessive force that could damage the muscle or tendon.
Step 4: Match the descriptions in the problem to the correct receptor. The phrase 'detect the degree to which a muscle is stretched' corresponds to muscle spindles, and the phrase 'detect the force of a muscle contraction' corresponds to Golgi tendon organs.
Step 5: Conclude that the correct answer involves identifying muscle spindles as the receptors for stretch and Golgi tendon organs as the receptors for force detection.
Verified video answer for a similar problem:
This video solution was recommended by our tutors as helpful for the problem above.
Was this helpful?
Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Muscle Spindles
Muscle spindles are sensory receptors located within the belly of muscles. They detect changes in muscle length and the rate of that change, providing the central nervous system with information about muscle stretch. This feedback is crucial for maintaining posture and coordinating movement.
Recommended video:
04:02
Centrosomes & Mitotic Spindles
Golgi Tendon Organs
Golgi tendon organs are proprioceptive sensory receptors located at the junction of muscles and tendons. They monitor the tension or force generated by muscle contractions, helping to prevent muscle damage from excessive force. This feedback allows for the regulation of muscle activity and contributes to overall motor control.
Recommended video:
3:01Tendon Reflex
Proprioception
Proprioception is the body's ability to sense its position and movement in space. It involves the integration of sensory information from muscle spindles, Golgi tendon organs, and other receptors to provide awareness of body posture and movement. This sense is essential for coordination, balance, and executing complex motor tasks.
Recommended video:
3:34Somatosensory System
Related Practice
Textbook Question
Which of the following is the correct order of events of a reflex arc?
a. Stimulus detection and delivery → motor response → integration in the CNS
b. Motor response → stimulus detection and delivery → integration in the CNS
c. Stimulus detection and delivery → integration in the CNS → delivery of motor response
d. Integration in the CNS → motor response → stimulus detection and delivery
1
views
Textbook Question
Which parts of the body have the greatest amount of space dedicated to them in the primary somatosensory cortex? Why?
3
views
Textbook Question
The cell bodies of upper motor neurons reside in the ________ and function to ________, whereas the cell bodies of lower motor neurons reside in the ________ and function to ________.
1
views
Textbook Question
Which of the following statements is false?
a. The spinothalamic tracts are part of the anterolateral system.
b. Pain, temperature, and crude touch stimuli are carried by the anterolateral system.
c. Descending pathways from the brain and spinal cord can make the spinal cord less receptive to pain stimuli.
d. The thalamus serves as the 'gateway' for entry of all special sensory stimuli into the cerebral cortex, with the exception of audition (hearing).
2
views
Textbook Question
Label the following components of the corticospinal tracts with numbers 1 through 6, with 1 being the origin of the tracts and 6 their destination.
_____ Medullary pyramids where most fibers decussate.
_____ Anterior horn of the spinal gray matter.
_____ Midbrain and pons.
_____ Upper motor neurons in the primary motor and premotor cortices.
_____ Corona radiata and internal capsule.
_____ Lateral funiculus of the spinal cord.
1
views