Textbook Question
The chewing muscles that protract the mandible and produce side-to-side grinding movements are the
a. Buccinators
b. Masseters
c. Temporalis
d. Pterygoids
Ch. 10 The Muscular System
Marieb, Hoehn11th EditionHuman Anatomy & PhysiologyISBN: 9780136874034
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Table of contents
- Ch. 1 The Human Body: An Orientation24
- Ch. 2 Chemistry Comes Alive25
- Ch. 3 Cells: The Living Units21
- Ch. 4 Tissue: The Living Fabric20
- Ch. 5 The Integumentary System11
- Ch. 6 Bones and Skeletal Tissues19
- Ch. 7 The Skeleton14
- Ch. 8 Joints7
- Ch. 9 Muscles and Muscle Tissue26
- Ch. 10 The Muscular System26
- Ch. 11 Fundamentals of the Nervous System and Nervous Tissue19
- Ch. 12 The Central Nervous System26
- Ch. 13 The Peripheral Nervous System and Reflex Activity32
- Ch. 14 The Autonomic Nervous System19
- Ch. 15 The Special Senses26
- Ch. 16 The Endocrine System23
- Ch. 17 Blood25
- Ch. 18 The Cardiovascular System: The Heart24
- Ch. 19 The Cardiovascular System: Blood Vessels27
- Ch. 20 The Lymphatic System and Lymphoid Organs and Tissues14
- Ch. 21 The Immune System: Innate and Adaptive Body Defenses27
- Ch. 22 The Respiratory System21
- Ch. 23 The Digestive System31
- Ch. 24 Nutrition, Metabolism, and Energy Balance26
- Ch. 25 The Urinary System26
- Ch. 26 Fluid, Electrolyte, and Acid-Base Balance24
- Ch. 27 The Reproductive System24
- Ch. 28 Pregnancy and Human Development25
- Ch. 29 Heredity11
Marieb, Hoehn11th EditionHuman Anatomy & PhysiologyISBN: 9780136874034Not the one you use?Change textbook
Chapter 10, Problem 7
Muscles that depress the hyoid bone and larynx include all but the:
a. Sternohyoid
b. Omohyoid
c. Geniohyoid
d. Sternothyroid
Verified step by step guidance1
Step 1: Understand the function of the muscles listed. The question asks which muscle does NOT depress the hyoid bone and larynx. Depressing means moving these structures downward.
Step 2: Review the actions of each muscle: Sternohyoid, Omohyoid, and Sternothyroid are known infrahyoid muscles that typically depress the hyoid bone and larynx.
Step 3: Examine the Geniohyoid muscle. This muscle is a suprahyoid muscle, which generally elevates the hyoid bone and moves it forward, rather than depressing it.
Step 4: Compare the functions: Since Sternohyoid, Omohyoid, and Sternothyroid depress the hyoid bone and larynx, and Geniohyoid elevates it, the Geniohyoid is the exception.
Step 5: Conclude that the muscle which does not depress the hyoid bone and larynx is the Geniohyoid.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Muscles of the Hyoid Bone
The hyoid bone is a U-shaped bone in the neck that supports the tongue and is involved in swallowing and speech. Various muscles attach to it, either elevating or depressing it, which affects the position of the larynx and throat structures.
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Depressor Muscles of the Hyoid and Larynx
Depressor muscles lower the hyoid bone and larynx during actions like swallowing and speaking. Key depressors include the sternohyoid, omohyoid, and sternothyroid muscles, which pull these structures downward to facilitate airway and digestive tract functions.
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Geniohyoid Muscle Function
The geniohyoid muscle elevates the hyoid bone and moves it forward, aiding in swallowing. Unlike the depressor muscles, it acts as a suprahyoid muscle, lifting the hyoid rather than depressing it, which is critical for distinguishing its role in neck anatomy.
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Related Practice
Textbook Question
Intrinsic muscles of the back that promote extension of the spine (or head) include all but:
a. Splenius muscles
b. Semispinalis muscles
c. Scalene muscles
d. Erector spinae
Textbook Question
The prime mover of inspiration is the:
a. Diaphragm
b. Internal intercostals
c. External intercostals
d. Abdominal wall muscles
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Textbook Question
The arm muscle that both flexes and supinates the forearm is the
a. Brachialis
b. Brachioradialis
c. Biceps brachii
d. Triceps brachii
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Textbook Question
A prime mover of thigh flexion is the:
a. Rectus femoris
b. Iliopsoas
c. Vastus muscles
d. Gluteus maximus
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Textbook Question
Several muscles act to move and/or stabilize the scapula. Which of the following are small rectangular muscles that square the shoulders as they act together to retract the scapula?
a. Levator scapulae
b. Rhomboids
c. Serratus anterior
d. Trapezius
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