Muscle

Question 0

Myofibril…?

Answer 0

In myocyte, numerous fine fibers packed densely in sacroplasm.

Myofibril= actin and myosin

Question 1

Myocyte…?

Answer 1

Muscle fibers, contains many mitochondria, several nuclei

Question 2

Sliding Filament Theory…?

Answer 2

Thick and thin filament slides against each other and move towards the center of sacromere.

Question 3

What are thick filament myosin heads are attached to…?

Answer 3

Actin (thin filaments)

Question 4

What happens when a myosin head pulls filament in?

Answer 4

It shortens it and the muscle contracts.

Question 5

What is the I bands?

Answer 5

Thin filaments only, sues of the sarcomere

Question 6

What is the H zone?

Answer 6

Thick filaments only, center of the sarcomere

Question 7

What is the A band?

Answer 7

Contains both thick and thin filaments, center of the sarcomere spans the H zone

Question 8

What is the Z line/disc?

Answer 8

Zigzag line on the sides of the sarcomere, connects the filaments of adjacent sarcomere

Question 9

Tropomyosin…?

Answer 9

Long protein that spirals along actin, blocks myosin head from cross-linking

Question 10

Troponin…?

Answer 10

Binds tropomyosin, moves it out of the way when calcium is around

Question 11

Endomyosium…?

Answer 11

Connective tissue sheath enclosing each muscle fiber

Question 12

Perimysium…?

Answer 12

Several sheathed fibers wrapped by fibrous membrane

Question 13

Fascicle…?

Answer 13

Wrapped bundle of fibers

Question 14

Epimesium…?

Answer 14

Many fascicles together bound by connective tissue

Question 15

Aponeurosis…?

Answer 15

Layers of endomesia, attach muscles to bones or other muscles

Question 16

Tendon…?

Answer 16

Collagen rich connective tissues that connects muscle to bone

Question 17

Fascia…?

Answer 17

Collagen rich connective tissue that connects muscles to other muscles

Question 18

Ligament…?

Answer 18

Collagen rich connective tissue that connects bones to other bones