musculoskeletal system

Question 1

what are muscles? what do they do?

Answer 1

soft tissue rich in actin and myosin
produce force and motion

Question 2

what is a syncytium?

Answer 2

multinucleated cell formed by fusion of multiple cells

Question 3

3 type of muscles?

Answer 3

skeletal - structural
cardiac - functional
smooth - functional

Question 4

what is a sarcomere?

Answer 4

repeating unit of a myofibril

Question 5

which is the A band?

Answer 5

dark band (full length of myosin)

Question 6

which is the I band?

Answer 6

light band (z-disk to end)

Question 7

M-line?

Answer 7

centre

Question 8

h-zone?

Answer 8

in between actin (thin)

Question 9

z-disk

Answer 9

attaches actin myofilaments

Question 10

Ectoderm epithelium?

Answer 10

covers external surfaces

Question 11

Mesoderm epithelium?

Answer 11

covers urogenital tract

Question 12

Endoderm epithelium?

Answer 12

covers internal organs and GI tract

Question 13

simple epithelial?

Answer 13

one layer of cells

Question 14

stratified epithelial?

Answer 14

multilayered

Question 15

3 layers of skin?

Answer 15

epidermis - outermost barrier
Dermis - dense irregular tissue 2 layers
hypodermis (subcutaneous) - lowermost, fat storage

Question 16

thick filament?

Answer 16

myosin

Question 17

thin filament?

Answer 17

actin