Muscular System Flashcards
1
Q
What are the Functions of the Muscular System?
A
- Movement
- Body Posture
- Contract
2
Q
What are the Smooth Muscles?
A
- Involuntary
- Move Contents Throughout the Body
- Two Types (Multi-unit and Visceral)
Slow to Contract
3
Q
What are the Cardiac Muscles?
A
- Walls the Heart
- Found in the Heart
- Moves Blood through the Heart
- Involuntary
- Autorhythmic
- Cells are called Cardiomyocytes and have One - Nucleus
- Muscle Fibers Contract as a Unit
4
Q
What are the Skeletal Muscles?
A
- Attaches to the Bones and Skin
- Body Movement
- Maintaining of Posture
- Heat Generation through Shivering
- Voluntary
- Fast to Contract/Relax
5
Q
What are the 4 Characteristics of Muscles?
A
- Contractility (Muscle Cells can be Shortened)
- Excitability (Responds to Stimulus)
- Extensibility (Muscles can Stretch)
- Elasticity (Ability to Bounce Back)
6
Q
How do Pairs of Muscles Work Together?
A
- Contraction (Movement of Muscle Fibers)
7
Q
What is Origin?
A
Attachment site of a muscle to the less movable bone during muscle contraction
8
Q
What is Insertion?
A
Attachment site of a muscle to the more movable bone during muscle contraction
9
Q
What are the Sources of Energy?
A
Creatine phosphate
Anaerobic respiration
Aerobic respiration
10
Q
Lab Test
A
- Serum Myoglobin
- Serum & Urine creatine
- Muscle enzyme CK
- LDH
- Muscle biopsy-culture and microscopic examination
- Electromyography (EMG)- abnormal electrical pattern produced by diseased muscles
