Muscular System Flashcards
1
Q
Movement
A
- Only tissue in the body that has the ability to contract and move other parts of the body
- Movement of substances inside the body
- Transportation of substances like blood or food from one part of the body to another
2
Q
Heat
A
- Body heat
- Produce waste heat
- Small muscle contractions produce natural body heat
- When we exert ourselves more than normal, the extra muscle contractions lead to a rise in body temperature and eventually to sweating
3
Q
Stabilisation
A
- Maintenance of posture and body position
- Muscles responsible for posture hold up the body throughout the day without becoming tired
- Muscles contract to hold the body still or in a particular position rather than to cause movement
4
Q
Cardiac
A
- Striated in texture but works involuntarily
- Body needs to increase the intensity of hearts pumping action in cardiovascular activity
- During period of times, the heart accommodates to ensure adequate oxygen is provided to the body
- Example: Heart
5
Q
Smooth
A
- Non-striated, involuntary
- Long slim muscle fibres
- Contractions=slow+sustained
- example: Stomach, bladder
6
Q
Skeletal
A
- Attached to bones of the skeletal system
- Voluntary- controlled to contract and relax
- Striated in texture, contract easily
- Tremendous strength and power
- example: Hamstring, abdominal muscle
7
Q
Origin and Insertions
A
- origin of the muscle is usually attached directly or indirectly to the bone via a tendon (Fixed position)
- The attachment (insertion) of the muscle is usually by a tendon at the movable end, which tends to be away from the body’s main mass.
8
Q
Agonist
A
any muscle whose flexion produces movement
9
Q
Antagonist
A
muscles that must relax in order for the agonist muscle/s to produce a movement.
10
Q
Concentric
A
when the muscle exerts a force and shortens in length
11
Q
Eccentric
A
when the muscle produces a force but increases in its length
12
Q
Isometric
A
when a muscle produces a force but does not change in length
