Muscles Flashcards Preview

Medicine Term One > Muscles > Flashcards

Flashcards in Muscles Deck (121)
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1

what do muscles do

generate force and movement

2

Name the three types of muscle

smooth, skeletal and cardiac

3

what muscle is striated

skeletal and cardiac

4

smooth muscle is not a striated but arrangement is

single unit cells, in a much more random arrangement

5

What muscle can divide and repair itself

smooth

6

Striated muscle is arranged in

Highly organised geometrical fashion of triangular and hexagons

7

striated muscle is highly packed so

squeezes out nucleus

8

cardiac muscle cells have what

intercalating disc

9

what does an intercalating disc do

allows electrical conductivity

10

Hard to depolarise heart due to

Multi connected heart providing alternative pathway due to the intercalating discs

11

What are striated muscle

arranged large protein filaments

12

what are muscles incased in

connective tissue sheaths

13

what are myoblasts

precursors for muscle

14

true or false myoblasts replace cells if damaged

false

15

what are damaged muscles replaced with

scar tissue

16

what happens if neighbouring cells die around muscle

makes it harder to contract

17

What are muscles attached to

Bones by tendons

18

what differentiates to form new muscle fibres when its damaged

satellite cells

19

Muscle cells never completely recover due to

limited stock of satellite cells

20

what do satellite cells move directly to

injury

21

What supplies muscles with oxygen for contractions

very deeply penetrating blood vessels

22

To much compression on blood vessels restricts muscles

oxygen levels, as can cut of supply

23

repeating units in striations are

sacromere

24

what lies between repeating units of sacromeres

Z line border

25

Do myosin fibres or actin fibres change in length

No

26

What causes contractions

Filaments slidding over each other and distance between them decreases

27

Thin filament and thick filament is

actin and myosin

28

What is the arrangement of actin

looks like a double helix

29

what is attached to actin

titin filament

30

cross head bridge is attached to what

Myosin filament

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