Flashcards in Musculoskeletal 5 Deck (67)
What is muscle tissue designed for?
What does muscle convert?
Chemical energy (ATP) into mechanical energy
What is muscle tissue designed specifically to move?
Different parts of the body by pulling on another tissue.
What are 5 functions of muscle?
Control of body openings and passages
Describe the movement function of muscle
Movement isn't confined to the movement of bones in the skeletal system. Other examples of movement include; moving gut contents and lymph transportation (smooth muscle) and circulating blood (cardiac muscle)
Describe the stability function of muscle?
Muscle plays an important role in stabilising joints and maintaining posture and is especially important in stabilising joints that have a wide range of movement- in these joints, stability (normally provided by the ligaments and/or the articular capsule) has been replaced with active contraction of surrounding muscles
Describe the communication function of muscle
Muscles are used for facial expression, body language, writing and speech
Describe the function of control of body openings and passages in muscle
Ring-like muscle (spinchters) help control the admission of light (eyelid and pupils) and food and drink (muscles around the mouth) that enter our bodies. The elimination of waste is also controlled by the urethral and anal sphincters (smooth and skeletal muscle)
What is the passage of food and liquid through the gut normally controlled by?
Discuss the hear production function of muscle?
Skeletal muscle can produce as much as 85% of body heat and is used to maintain the body as 37 degrees for normal function
What is origin?
The attachment that moves the least during muscle contraction
What is insertion?
The attachment that moves the most during muscle contraction
What is the epimysium?
Dense irregular connective tissue surrounding the perimysium and the entire muscle
What is the perimysium?
Dense irregular connective tissue surrounding the fascicles
What is endomysium?
Loose irregular connective tissue surrounding myocytes. Contains the nerves and capillaries that supply the myocytes
What is the thin basement membrane between the myocytes and the endomysium?
A thin, specialised sheet of connective tissue that surrounds muscle fibres and blends with the endomysium
What is the sarcoplasm?
Cell cytoplasm in the area between myofibrils
What is the sarcolemma?
The fast-conducting cell membrane
Is the deep fascia part of the muscle?
What is a myofibril?
What is a myocyte/myofibre?
A muscle fibre/cell- a bundle of myofibrils
What is a fascicle?
A bundle of myocytes
What is a muscle?
A bundle of fascicles
Is a myofibril an organelle?
What is a deep fascia?
A wrapping of dense connective tissue (regular and irregular) which covers the deep structures of the body
Where is the deep fascia?
It underlies skin and the subcutaneous tissue (also known as superficial fascia)
What are compartments?
Muscles that are supplied by the same nerves (innervation) or have a similar action can sometimes be found grouped together in regions
What are the outer sleeve and wall of compartments made of?
What are investing fascia?
The walls or septa of compartments (eg intermuscular septa or interosseous membranes)