Muscular System Flashcards
It is result of movement of the body
Muscle Contractions
What are the three types of muscles
Skeletal Muscle
Smooth Muscle
Cardiac Muscle
Type of muscle attached to the bones, has striations, it is voluntary, and controls body movement
Skeletal Muscles
Type of muscle found in walls of hollow organs, has no striations, it is involuntary and moves substances
Smooth Muscle
Type of tissue found in the heart, has striations, it is involuntary, and pumps and propels blood
Cardiac Muscle
Functions of Muscled
Movement of the Body
Maintenance of Posture
Respiration
Communication
Constriction of organs and vessels
Contraction of the heart
What are the general properties of a muscle
Contractility
Excitability
Extensibility
Elasticity
It is the ability of the muscle to shorten forcefully or contract
Contractility
It is the capacity of muscle to respond to an electrical stimulus
Excitability
It means a muscle can be stretched beyond its normal resting length
Extensibility
It is the ability of muscle to spring back to its original resting length
Elasticity
Give the Hierarchical Organization of a Muscle
Whole Muscle
Muscle Fascicle
Muscle Fiber
Myofibril
Myofilament
It is a complete organ surrounded by muscular fascia and epimysium, it has many blood vessels and nerves including motor neurons that stimulate contractions
Whole Muscle
It is a bundle of muscle fibers within the entire muscle, it is surrounded by the connective tissue layer, perimysium
Muscle Fascicle
It is an individual muscle cell within a fascicle; surrounded by the connective tissue layer, endomysium
Muscle Fiber
It is a group of contractile proteins within individual muscle fibers; surrounded by specialized endoplasmic reticulum called sarcoplasmic reticulum
Myofibril
These are protein filaments, either myosin or actin; it interacts to shorten the muscle fiber during contraction
Myofilament
These are the “motors” that converts chemical ATP energy into the mechanical energy
Muscle Cells
What are the three types of muscle tissue
Skeletal Muscle
Cardiac Muscle
Smooth Muscle
It is a feature which all types of muscle share
Contraction
What type of muscle controls body movement
Skeletal Muscle
What type of muscle moves food, empties the bladder, regulates blood vessel diameter etc…
Smooth Muscle
What type of muscle pumps blood, and propels blood through blood vessels
Cardiac Muscle
Major functions of the tissue
Respiration
Production of body heat
Maintenance of posture
Movement of the body
Communication
Constriction
Contraction of the heart
What are the four functional properties of the muscle
Contractility
Excitability
Extensibility
Elasticity
It is the ability to shorten muscle forcefully
Contractility
It is the capacity of muscle to respond to an electrical stimulus, the stimulus is from nerves that we control
Excitability
It means that a muscle can stretch beyond its normal resting length and still be able to contract
Extensibility
It is the ability of the muscle to spring back to its original resting length after being stretched
Elasticity
