Chapter 2- Part 3 Flashcards
What does the muscular system allow and why?
Everyday movements such as running, jumping and kicking, as muscles exert forces on bones
What is every muscle in our body capable of?
Contracting and relaxing
What are the functions of the muscular system?
Body movement, maintenance of posture and essential bodily functions such as heat production
What does voluntary muscle allow for and give an example?
Body movement to occur, such as the biceps
What is involuntary muscle essential for and give an example?
Bodily functions required for survival, such as muscles in the intestinal tract
What is skeletal muscle?
Voluntary muscle made up of striped cells, controlled from the central nervous system, which attracts the skeletal system and allows body movement to occur
What is cardiac muscle?
Involuntary muscle found only in the walls of the heart
What is smooth muscle?
Involuntary muscle made up of spindle cells, which contracts rhythmically, slowly and for sustained periods of time, such as muscles of blood vessels
What is muscle belly?
The main body of the muscle itself
What is the origin?
The site where muscle is attached to a stable bone
What is insertion?
The site where muscle attached to bone is pulled by the action of the muscle
What is the origin and insertion of the bicep?
Origin= Scapula Insertion = Radius
If muscles need to contract rapidly, what should the muscle length to fibre ratio be?
The muscle length to fibre ratio should be low, because they can generate greater contractile velocities
How do muscles work?
As a pair, never in isolation
What do stabilisers do?
Hold a body part still, making it immobile whilst another body part is moving
