The Muscular System Flashcards
What are the functions of muscles?
The ability to contract, producing movement in the body or maintaining the position of parts of the body
What are the 3 types of muscle tissue?
Smooth Muscle
Cardiac muscle
Skeletal muscle
What is Smooth Muscle?
Most diverse type of muscle
Found in internal organs
Involuntary as it is controlled by the autonomous nervous system
What is Cardiac muscle?
Known as myocardium
Found in the heart
Involuntary as it is controlled by the sinoatrial node
What is Skeletal Muscle?
Represents the majority of muscle in the body
Attaches to bone across joints via tendons
Produces movements within the body
Generates heat
What are the functions of the muscular system ?
Mobility
Circulation
Respiration
Childbirth
Urination
Digestion
Vision
Stability
Posture
What are the 4 main properties of muscle tissue?
Elasticity
Contractility
Electrical excitability
Extensibility
What is Elasticity?
Returns to the original length after a stretch
What is Contractility?
Develops tension in order to perform a contraction
What is Electrical excitability?
Can respond to a stimulus
What is Extensibility?
Ability to be stretched or to increase in length
What are Myofilaments?
The rigid protein filaments (actin and myosin) within myofibrils
Responsible for the creation of tension during contraction
What is Actin?
Thin protein strand
What is Myosin?
Thick protein strand
What is the control of muscular force achieved through?
Adjusting the number of motor units recruited
Increasing the frequency of their discharge
