Podcast
Questions and Answers
How much of an adult's body weight comes from muscle tissue?
How much of an adult's body weight comes from muscle tissue?
- About 66%
- About 20%
- About 50% (correct)
- About 30%
What kind of muscle has contractions that occur involuntarily and are rhythmic and slow?
What kind of muscle has contractions that occur involuntarily and are rhythmic and slow?
Smooth muscle
What kind of muscle has contractions that occur voluntarily and may be rapid and forceful?
What kind of muscle has contractions that occur voluntarily and may be rapid and forceful?
Skeletal muscle
What type of muscle has contractions that occur involuntarily and are rhythmic and automatic?
What type of muscle has contractions that occur involuntarily and are rhythmic and automatic?
What is the term for overstretching or tearing of a muscle?
What is the term for overstretching or tearing of a muscle?
What is the term for chronic contraction of the muscles of the neck, causing the head to turn to one side?
What is the term for chronic contraction of the muscles of the neck, causing the head to turn to one side?
What is a sustained contraction of a muscle called?
What is a sustained contraction of a muscle called?
What are involuntary muscle contractions that cause repetitive movements or abnormal postures called?
What are involuntary muscle contractions that cause repetitive movements or abnormal postures called?
What infectious disease causes continuous spasms of voluntary muscles?
What infectious disease causes continuous spasms of voluntary muscles?
What is chronic muscle pain in specific muscle points lasting months called?
What is chronic muscle pain in specific muscle points lasting months called?
What is it called when muscles shrink in size and lose strength due to lack of use?
What is it called when muscles shrink in size and lose strength due to lack of use?
What autoimmune disease affects the neuromuscular junction and results in weakness of the voluntary muscles?
What autoimmune disease affects the neuromuscular junction and results in weakness of the voluntary muscles?
The characteristic where a muscle is able to shorten and reduce the distance between the parts of its contents is called?
The characteristic where a muscle is able to shorten and reduce the distance between the parts of its contents is called?
Which bone is controlled by the muscles of mastication?
Which bone is controlled by the muscles of mastication?
The shrinkage of muscles from disease is called?
The shrinkage of muscles from disease is called?
Which term is used to describe muscle pain?
Which term is used to describe muscle pain?
Muscles that are attached to the bones are called?
Muscles that are attached to the bones are called?
Which term describes the part of a skeletal muscle that is attached to a fixed structure or bone?
Which term describes the part of a skeletal muscle that is attached to a fixed structure or bone?
The large triangular muscle located on the upper surface of the back is called the?
The large triangular muscle located on the upper surface of the back is called the?
Which word part means weakness?
Which word part means weakness?
There are how many principle types of muscles?
There are how many principle types of muscles?
The ability to respond to certain stimuli by producing electric signals is called?
The ability to respond to certain stimuli by producing electric signals is called?
Which muscle extends the femur and rotates it outwardly?
Which muscle extends the femur and rotates it outwardly?
This occurs when an organ protrudes through a weak muscle.
This occurs when an organ protrudes through a weak muscle.
Cardiac muscle cells start to die when the oxygen supply is cut off for as little as how many seconds?
Cardiac muscle cells start to die when the oxygen supply is cut off for as little as how many seconds?
Which type of muscle fibers are short, branching fibers with a centrally located nucleus and nondistinct striations?
Which type of muscle fibers are short, branching fibers with a centrally located nucleus and nondistinct striations?
A motor neuron plus all the muscle fibers it stimulates is called?
A motor neuron plus all the muscle fibers it stimulates is called?
An inflammation of a group of tendons that fuse together and surround the shoulder joint is called?
An inflammation of a group of tendons that fuse together and surround the shoulder joint is called?
The word root troph means?
The word root troph means?
Which muscle is used to control breathing?
Which muscle is used to control breathing?
What does intramuscular mean?
What does intramuscular mean?
Study Notes
Muscle Anatomy and Characteristics
- Approximately 50% of an adult's body weight is from muscle tissue.
- Three types of muscle:
- Smooth Muscle: Involuntary, rhythmic, slow contractions.
- Skeletal Muscle: Voluntary, rapid, and forceful contractions.
- Cardiac Muscle: Involuntary, rhythmic, and automatic contractions.
Muscle Conditions and Injuries
- Muscle Strain: Overstretching or tearing of a muscle.
- Torticollis: Chronic neck muscle contraction causing head to tilt.
- Muscle Spasm: Sustained contraction leading to cramping.
- Dystonia: Involuntary muscle contractions causing abnormal movements.
- Tetanus: Infectious disease resulting in continuous muscle spasms.
- Fibromyalgia: Chronic muscle pain in specific areas lasting months.
Muscle Health and Changes
- Atrophy: Muscle shrinkage and strength loss due to disuse.
- Myasthenia Gravis: Autoimmune disease affecting voluntary muscle strength.
Muscle Physiology
- Contractility: Ability of muscle to shorten and reduce distance between parts.
- Excitability: Ability to respond to stimuli and generate electrical signals.
- A motor unit consists of a motor neuron and all the muscle fibers it stimulates.
Muscle Structure and Terminology
- Origin: Part of skeletal muscle attached to a fixed structure or bone.
- Skeletal Muscles: Attached to bones and control voluntary movement.
- Myalgia: Term for muscle pain.
Important Muscle Facts
- Gluteus Maximus: Extends and outwardly rotates the femur.
- Trapezius Muscle: Large triangular muscle on the upper back.
- Cardiac muscle cells can start dying within 30 seconds of oxygen deprivation.
- Intramuscular injections refer to administering medication directly into the muscle.
Miscellaneous
- Hernia: Occurs when an organ protrudes through a weak muscle.
- Rotator Cuff Injury: Inflammation of fused tendons surrounding the shoulder.
- The muscle fiber type that is short, branched, and has a centrally located nucleus is cardiac muscle.
- The diaphragm is essential for controlling breathing.
Studying That Suits You
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Description
Test your knowledge on muscle types and their characteristics with these flashcards from Anatomy Chapter 7. This quiz covers essential information about muscle tissue, including involuntary and voluntary contractions. Perfect for students seeking to master muscle anatomy concepts.
