Question | Answer |
Approximately how many muscles are in the body? | 650. |
What is the normal % of muscle in body mass? | 35%. |
What are the 3 types of muscle? | Skeletal- voluntary and striated.
Visceral- involuntary and smooth.
Cardiac- involuntary and striated. |
What is the function of deep fascia? | Divides the limbs into compartments.
Compartments contain groups of muscles that share a function. |
Within a functional group... | ...the prime mover is the main participant in a movement.
...other muscles in the group are synergists.
...the group of muscles that oppose the movement are the antagonists. |
How are muscle fibres arranged? | In bundles or fasciculi. |
What are muscles associated with? | Extensive connective tissue coverings that support nerves and capillaries. |
What is the function of the endomysium? | It separates the muscle fibres. |
What is the function of the perimysium? | It lies between fasciculi. |
What is the epimysium? | A dense sheath on the surface of the muscle fibre. |
How do myocytes form? | Myosatellite cells give rise to myoblasts, which mature into myocytes. |
What is the function of myostatin? | It inhibits the process of differentiation in skeletal muscles. |
How does muscle interact with the nervous system? | Muscle consists of cells that when stimulated by nerves, contract causing tension that brings about movement at synovial joints. |
Define the periosteum? | A layer of dense connective tissue that covers the surface of a bone except at the articular surfaces. |
What is the structure of the periosteum? | The outer layer is extremely dense and contains a large number of blood vessels.
The inner layer is more cellular in appearance and contains osteoblasts and fewer blood vessels. |
What is the main function of the periosteum? | Provides attachment for muscles, tendons and ligaments. |
What is the function of a tendon? | To attach muscle to bone. |