Podcast
Questions and Answers
Muscles account for approximately what percentage of a person's weight?
Muscles account for approximately what percentage of a person's weight?
- 10%
- 75%
- 40% (correct)
- 90%
What is the basic structural unit of a muscle?
What is the basic structural unit of a muscle?
- Tendon
- Sarcomere (correct)
- Muscle fiber
- Myofibril
What is the definition of muscle?
What is the definition of muscle?
- A type of connective tissue found in joints.
- A band of fibrous tissue that can contract. (correct)
- A nerve cell responsible for transmitting signals.
- A type of bone tissue.
What is a myofibril?
What is a myofibril?
Muscle cells convert chemical energy into what form to fuel their actions?
Muscle cells convert chemical energy into what form to fuel their actions?
Which of the following is a function of muscles?
Which of the following is a function of muscles?
Lever systems coordinate bones and muscles to create what?
Lever systems coordinate bones and muscles to create what?
Maintaining a constant body temperature is an example of which function of muscle?
Maintaining a constant body temperature is an example of which function of muscle?
What is muscle tone?
What is muscle tone?
What causes muscle fatigue?
What causes muscle fatigue?
What is contractility?
What is contractility?
What property allows muscles to respond to a stimulus?
What property allows muscles to respond to a stimulus?
What is extensibility?
What is extensibility?
What is elasticity in muscle tissue?
What is elasticity in muscle tissue?
Which of the following functions is NOT a function of muscle?
Which of the following functions is NOT a function of muscle?
Which of the following illustrates a first order lever?
Which of the following illustrates a first order lever?
Which type of lever is your arm?
Which type of lever is your arm?
What property enables the recoil of muscle tissue after stretching?
What property enables the recoil of muscle tissue after stretching?
To overcome a load and generate muscular effort, what mechanical system is most important?
To overcome a load and generate muscular effort, what mechanical system is most important?
Adenosine Triphosphate is shortened to...
Adenosine Triphosphate is shortened to...
True or false: muscles can push and pull
True or false: muscles can push and pull
Which of the following is not a property of muscle tissue?
Which of the following is not a property of muscle tissue?
In which order lever does the load sit between the fulcrum and the effort?
In which order lever does the load sit between the fulcrum and the effort?
What happens when there is not enough oxygen and nutrients in the muscles?
What happens when there is not enough oxygen and nutrients in the muscles?
True or false: Respiration is NOT a muscle function.
True or false: Respiration is NOT a muscle function.
A muscle fiber consists of several...
A muscle fiber consists of several...
Which of the following properties enables muscles to stretch?
Which of the following properties enables muscles to stretch?
The ability to respond to a stimulus is known as what?
The ability to respond to a stimulus is known as what?
Flashcards
Muscle Definition
Muscle Definition
A band of fibrous tissue in a human or animal body that has the ability to contract, producing movement in or maintaining position.
Myofibril
Myofibril
The contractile thread of a muscle cell.
Sarcomere
Sarcomere
The basic structural unit of a muscle, composed of long fibrous proteins that slide past each other, creating dark and light bands.
Muscle Fuel
Muscle Fuel
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Muscle Stability
Muscle Stability
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Muscle Movement
Muscle Movement
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Muscle Circulation
Muscle Circulation
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Muscle Respiration
Muscle Respiration
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Muscle Digestion
Muscle Digestion
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Muscle Heat Production
Muscle Heat Production
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Muscle Organ Protection
Muscle Organ Protection
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Muscle Urination
Muscle Urination
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Lever Systems
Lever Systems
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Muscle Fatigue
Muscle Fatigue
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Muscle Tone
Muscle Tone
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Contractility
Contractility
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Excitability
Excitability
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Extensibility
Extensibility
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Elasticity
Elasticity
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Study Notes
- Notes for Muscle - Part 1, by Julie Watson
GDC (General Dental Council) Learning Outcomes
- The learning outcomes are 1.1.1, 1.1.3, 1.1.5, 9.1, and 9.2
Formative Assessment
- A workbook needs to be completed after the two muscle sessions
Session Learning Outcomes
- Classifying different muscle tissues
- Describing the functions of muscles
- Describing the properties of muscle tissue
Muscle Tissue Composition
- Muscles account for 40% of a person's weight
Muscle Tissue Definition
- Muscles are fibrous tissue bands in a human or animal body
- These bands have the ability to contract
- This produces movement and maintains body position
Myofibril Information
- Muscle tissue is composed of muscle cells
- Muscle cells consists of several myofibrils
- The myofibril is the contractile thread of a muscle
- Myofibrils extend from one end of the muscle fiber to the other
Sarcomere Information
- Sarcomeres are composed of long fibrous proteins
- These proteins slide past each other
- This results in the appearance of dark and light bands under a microscope
- The sarcomere is a basic structural unit of a muscle
Muscle Fuel
- Muscle cells fuel actions by converting chemical energy
- This is in the form of Adenosine Triphosphate (ATP)
- ATP is derived by the metabolism of food into chemical energy
Muscle Functions
- Posture/Muscle Tone is a function
- Stability is a function
- Mobility/Movement is a function
- Circulation is a function
- Respiration is a function
- Digestion is a function
- Temperature Regulation/Heat Production is a function
- Organ Protection is a function
- Urination is a function
Movement
- Movement depends on lever systems to co-ordinate our bones and muscles
Lever Systems
- Lever Systems functions include generating muscular effort for a given load
- Lever Systems functions include increasing the speed of a given movement
- First order levers exist
- Second order levers exist
- Third order levers exist
Heat Production
- Healthy survival depends on maintaining a constant body temperature
Muscle Tone
- Muscle tone is a state of sustained partial contraction of a muscle
Muscle Fatigue
- It is caused by not enough oxygen and nurients
- It is caused by build up of waste products
Properties of Muscle Tissue
- Muscle cells share several properties
- Contractility is a property
- Excitability is a property
- Extensibility is a property
- Elasticity is a property
Contractility
- Contractility is the ability of muscles to forcefully shorten
- For muscles to work one will need to flex and the other contract
- Muscles can only pull and can never push
Excitability
- The ability to respond to a stimulus
- Delivered from a motor neurone or hormone
Extensibility
- Extensibility is the ability for a muscle to be stretched
Elasticity
- Elasticity is the ability for the muscle to recoil or bounce back to its original length after being stretched
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