Textbook Question
Why do you think that the muscles of the erector spinae and transversospinal muscle groups remain in a state of continual contraction when we are upright?
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Ch. 9 The Muscular 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 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 9, Problem 3
Match the term with its description:
_____Brevis
_____Digitorum
_____Hallucis
_____Rectus
_____Flexor
_____Pronator
a. Related to the fingers/toes
b. Straight
c. Short
d. Decreases the angle between bones
e. Turns palm down
f. Related to the hallux (great toe)
Verified step by step guidance1
Step 1: Understand the anatomical terms provided in the problem. Each term corresponds to a specific description based on its Latin root or anatomical function.
Step 2: Match 'Brevis' with its description. 'Brevis' is derived from Latin and means 'short,' so it corresponds to option 'c. Short.'
Step 3: Match 'Digitorum' with its description. 'Digitorum' refers to the fingers or toes, so it corresponds to option 'a. Related to the fingers/toes.'
Step 4: Match 'Hallucis' with its description. 'Hallucis' refers to the hallux, which is the great toe, so it corresponds to option 'f. Related to the hallux (great toe).'
Step 5: Match the remaining terms: 'Rectus' means 'straight' (option 'b'), 'Flexor' decreases the angle between bones (option 'd'), and 'Pronator' turns the palm down (option 'e').
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Muscle Terminology
Understanding muscle terminology is essential for identifying the functions and locations of various muscles in the body. Terms like 'flexor' and 'pronator' describe specific actions, while 'brevis' and 'digitorum' indicate the muscle's relation to size or specific body parts, such as fingers or toes.
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Guided course
2:00
Introduction to Muscles and Muscle Tissue Example 1
Anatomical Position
The anatomical position serves as a standard reference point in anatomy, where the body is standing upright, facing forward, with arms at the sides and palms facing forward. This position helps in accurately describing the location and orientation of muscles and bones, which is crucial for matching terms with their descriptions.
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Guided course
02:40Anatomical Position
Muscle Function
Each muscle has a specific function that can be inferred from its name. For example, 'flexor' indicates a muscle that decreases the angle between bones, while 'rectus' suggests a straight alignment. Understanding these functions aids in correctly matching terms with their corresponding descriptions.
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06:04Functional Groups
Related Practice
Textbook Question
Explain why strengthening the levator ani muscle may help improve bladder and bowel continence (voluntary control over urination and defecation).
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Textbook Question
Elise is a competitive gymnast who strained muscles in her left lower limb doing a tumbling pass. She has pain with extension of her leg and inversion of her foot. Which muscles did she potentially strain?
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Textbook Question
Ms. Hendrix suffered a severe hip fracture that required hip replacement surgery. After an extended recovery period, she is undergoing physical therapy to regain strength and mobility.
Which muscles were likely affected by the hip replacement surgery, and to which parts of the bone do they attach?
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Textbook Question
The rectus femoris muscle originates from the anterior superior iliac spine and inserts into the tibial tuberosity. Predict its main actions with only this information.
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Textbook Question
Chris is training for his black belt in karate and is working on developing a stronger punch. Which muscles do you recommend that he strengthen to improve his punch? Explain.
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