Face/Neck/Trunk Test Prep Flashcards
(110 cards)
3 types of Muscular Tissue
- Cardiac: heart
- Skeletal: bone attachment
- Smooth: internal organs
Anatomy Structures in Skeletal Muscles
- Connective Tissue,
- Muscle,
- Tendons,
- superficial and deep fascia
- Aponeurosis
- Retinacula
Functions of Skeletal Muscles
- Thermogenesis
- Stabilization of the body
- Movement of the body
Myofilaments that create a muscle contraction
- Thin filament: actin
- Thick filament: myosin
Number of Muscles in the body
640+
3 parts of a muscle
- Belly
- Origin
- Insertion
Excitation Definition for Muscle Contraction
Neurotransmitters bind to receptor sites on the motor end plate to cause an impulse that travelers through the T tubules into the Sarcoplasmic Reticulum (SR) that releases calcium ions that travel through the sarcoplasm into the sarcomeres.
Contraction Definition for Muscle Contraction
Calcium ions come into contact with the actin within the sarcomeres that stimulates the proponents and tropomyosin to expose myosin binding. Myosin attaches to the actin (cross bridging) and creates a power stroke. This action is continually repeated as long as ATP and calcium ions are present.
Extensibility Definition for Muscle Contraction
The ability for the muscle fibers to be stretched
Elasticity Definition for Muscle Contraction
The ability for muscle fibers to return to their pre contracted state.
Where ATP is produced
Mitochondria
Anaerobic glycosis
During muscle fatigue, the body can convert glycogen to glucose
First Stage:
- Oxygen is not used
- Starts really quick and ends within 30-60 sec
- Produces lactic acid
- lactic acid can be converted to glucose
- oxygen is used (heavy breathing) to process lactic acid
Aerobic Glycosis
During muscle fatigue, the body can convert glycogen to glucose
Second Stage:
- uses oxygen to produce the same as 36 ATP molecules
- expels carbon dioxide through mitochondrial cellular respiration
- continues as long as oxygen is available.
Gliding Filament Model (Simple Definition)
Muscle Contraction
All-or-none Response
- after a nerve impulse begins, it will be conducted at maximum capacity, without fluctuations in membrane potential and without any decrease in magnitude
- if the stimulus is sufficient, the muscle fibers associated with the motor unit will contract to their fullest extent
Tendon Definition
A cord of tough fibrous connective tissue that attaches muscle to bone
Muscle Strain Classifications
- Overstretch
- Minor Tear
- Major Tear
Isometric Contraction
- no movement occurs
- muscle length remains the same
- static contraction
Eccentric Contraction
- muscle lengthens and oppose concentric contractions
Concentric Contractions
- muscle shortens
Isotonic Contractions
- dynamic contractions
- involves movement
- includes both concentric and eccentric contractions
Origin
Attachment on less moveable bone
Insertion
Attachment on more moveable bone
Belly
Wide, central portion of the muscle that contains sarcomeres