Textbook Question
Which criterion (or criteria) is/are used in naming the gluteus medius?
a. Relative size
b. Muscle location
c. Muscle shape
d. Action
e. Number of origins
2
views
Ch. 10 The Muscular System
Marieb, Hoehn11th EditionHuman Anatomy & PhysiologyISBN: 9780136874034
Not the one you use?Change textbookSelect a different textbook
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 10
A prime mover of thigh flexion is the:
a. Rectus femoris
b. Iliopsoas
c. Vastus muscles
d. Gluteus maximus
Verified step by step guidance1
Step 1: Understand the term 'prime mover' in anatomy. A prime mover, or agonist, is the muscle primarily responsible for producing a specific movement at a joint.
Step 2: Identify the movement in question, which is thigh flexion. Thigh flexion refers to the action of lifting the thigh forward at the hip joint.
Step 3: Review the functions of each muscle option: Rectus femoris assists in thigh flexion but mainly extends the knee; Iliopsoas is a major hip flexor; Vastus muscles primarily extend the knee; Gluteus maximus is mainly responsible for thigh extension, not flexion.
Step 4: Determine which muscle is the main contributor to thigh flexion by comparing their primary actions. The Iliopsoas is known as the strongest and most important muscle for hip (thigh) flexion.
Step 5: Conclude that the prime mover of thigh flexion is the Iliopsoas based on its anatomical function and role in hip movement.
Verified video answer for a similar problem:
This video solution was recommended by our tutors as helpful for the problem above.
Video duration:
2mWas this helpful?
Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Thigh Flexion
Thigh flexion refers to the movement that decreases the angle between the thigh and the pelvis, typically lifting the leg forward. It is a fundamental motion in activities like walking, running, and climbing stairs.
Recommended video:
Guided course
4:40
Bones of the Thigh and Leg
Iliopsoas Muscle
The iliopsoas is a deep muscle group composed of the psoas major and iliacus muscles. It is the primary and most powerful flexor of the thigh at the hip joint, playing a crucial role in lifting the leg.
Recommended video:
Guided course
2:00Introduction to Muscles and Muscle Tissue Example 1
Role of Other Muscles in Thigh Movement
The rectus femoris assists in thigh flexion but mainly extends the knee; vastus muscles primarily extend the knee; gluteus maximus is the main thigh extensor. Understanding their functions helps identify the prime mover in thigh flexion.
Recommended video:
Guided course
5:41Muscle Actions
Related Practice
Textbook Question
Muscles that depress the hyoid bone and larynx include all but the:
a. Sternohyoid
b. Omohyoid
c. Geniohyoid
d. Sternothyroid
2
views
Textbook Question
Which of the following is a large, deep muscle that protracts the scapula during punching?
a. Serratus anterior
b. Rhomboids
c. Levator scapulae
d. Subscapularis
1
views
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 thigh extension against resistance is the:
a. Gluteus maximus
b. Gluteus medius
c. Biceps femoris
d. Semimembranosus
2
views
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
1
views