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Flashcards in Musculoskeletal 5 Deck (67)
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1

What is muscle tissue designed for?

Contraction

2

What does muscle convert?

Chemical energy (ATP) into mechanical energy

3

What is muscle tissue designed specifically to move?

Different parts of the body by pulling on another tissue.

4

What are 5 functions of muscle?

Movement
Stability
Communication
Control of body openings and passages
Heat production

5

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)

6

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

7

Describe the communication function of muscle

Muscles are used for facial expression, body language, writing and speech

8

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)

9

What is the passage of food and liquid through the gut normally controlled by?

Smooth muscle

10

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

11

What is origin?

The attachment that moves the least during muscle contraction

12

What is insertion?

The attachment that moves the most during muscle contraction

13

What is the epimysium?

Dense irregular connective tissue surrounding the perimysium and the entire muscle

14

What is the perimysium?

Dense irregular connective tissue surrounding the fascicles

15

What is endomysium?

Loose irregular connective tissue surrounding myocytes. Contains the nerves and capillaries that supply the myocytes

16

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

17

What is the sarcoplasm?

Cell cytoplasm in the area between myofibrils

18

What is the sarcolemma?

The fast-conducting cell membrane

19

Is the deep fascia part of the muscle?

No

20

What is a myofibril?

Many sarcomeres

21

What is a myocyte/myofibre?

A muscle fibre/cell- a bundle of myofibrils

22

What is a fascicle?

A bundle of myocytes

23

What is a muscle?

A bundle of fascicles

24

Is a myofibril an organelle?

Yes

25

What is a deep fascia?

A wrapping of dense connective tissue (regular and irregular) which covers the deep structures of the body

26

Where is the deep fascia?

It underlies skin and the subcutaneous tissue (also known as superficial fascia)

27

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

28

What are the outer sleeve and wall of compartments made of?

Deep fascia

29

What are investing fascia?

The walls or septa of compartments (eg intermuscular septa or interosseous membranes)

30

What happens to investing fascia when it comes into contact with bone?

It fuses with the periosteum