Muscle tissue

Question 0

Responsible for muscle cell contraction

Answer 0

Myofilament interaction

Question 1

Responsible for movement of the body and in parts and for changes in the size and shape of internal organs

Answer 1

Muscle tissue

Question 2

Attached to the bone and is responsible for movement of the axial and appendicular skeleton and for maintenance of body position and posture

Answer 2

Skeletal muscle

Question 3

Multinucleated syncytium

Answer 3

Skeletal muscle cell

Question 4

Delicate layer of reticular fibers that immediately surrounds individual muscle fibers

Answer 4

Endomysium

Question 5

Thicker connective tissue layer that surrounds a group of fibers to from a bundle or fascicle

Answer 5

Perimysium

Question 6

Sheath of dense conective tissue that surrounds a collection of fascicles

Answer 6

Epimysium

Question 7

Determines how fast the fiber can contract and relax

Answer 7

Contractile speed

Question 8

Determines the rate at which this enzyme is capable of breaking down ATP molecules during contraction cycle

Answer 8

Enzymatic velocity

Question 9

Indicates the capacity of ATP production by oxidative phosphorylation or glycolysis

Answer 9

Metabolic profile

Question 10

Principal fibers of the long muscles of the back in human, where they are adapted to the long, slow contraction needed to maintain erect posture

Answer 10

Type I fibers or Slow oxidative fibers

Question 11

Fast-twitch, fatigue-resistance motor units

Answer 11

Type IIa fibers or fast oxidative glycolytic fibers

Question 12

Fast-twitch, fatigue-prone motor units

Answer 12

Type IIb fibers or Fast glycolytic fibers

Question 13

Fibers that are adapted for rapid contraction and precise, fine movement

Answer 13

Type IIb fibers or Fast glycolytic fibers

Question 14

Structural and functional subunit of the muscle fiber

Answer 14

Myofibril

Question 15

Actual contractile elements of striated muscle

Answer 15

Myofilaments

Question 16

Principal histologic feature of striated muscle

Answer 16

Cross-striations

Question 17

Functional unit of myofibril

Answer 17

Sarcomere

Question 18

Basic contractile unit of striated muscle

Answer 18

Sarcomere

Question 19

A 64-Kd protein that also consists of a double helix of two polypeptides. It forms filaments that run in the groove between F-actin molecules.

Answer 19

Tropomyosin

Question 20

Mask the myosin-binding site on the actin molecule

Answer 20

Tropomyosin and troponin complex

Question 21

Smallest subunit of the troponin complex and binds to calcium

Answer 21

TnC

Question 22

30-Kd subunit, binds to tropomyosin, anchoring the troponin complex

Answer 22

TnT

Question 23

30-Kd subunit, binds to actin thus inhibiting actin-myosin interaction

Answer 23

TnI

Question 24

A large protein forms an elastic lattice that anchors thick filaments in the Z lines

Answer 24

Titin

Question 25

Short, bipolar, rod-shaped, actin-binding protein, bundles thin filaments into parallel arrays and anchors them at the Z line

Answer 25

Alpha-actinin

Question 26

Elongated, inelastic protein, helps alpha-actinin anchor thin filaments to Z lines and regulate the lenght of thin filaments during muscle development

Answer 26

Nebulin

Question 27

Actin-capping protein that maintains and regulates the length of sarcomeric actin filament

Answer 27

Tropomodulin

Question 28

A type of intermediate filament that forms a lattice that surrounds the sarcomere at the level of Z lines, attaching them to one another and to the PM thus forming stabilizing cross-links between neighboring myofibrils

Answer 28

Desmin

Question 29

Explains why only boys suffer from Duchenne’s muscular dystrophy

Answer 29

Encoded on the X chromosome