Contraction Of Skeletal Muscle

Question 1

Binds thick filaments to Z line

Answer 1

Titin

Question 2

Myosin is lightly bound to actin in 45°

Answer 2

Rigor complex

Question 3

Myosin heads contain…….-

Answer 3

Birding sites for actin
ATPase site

Question 4

Myosin heads grab onto actin

Answer 4

Cross bridge

Question 5

Myosin heads pull actin inward using ——-

Answer 5

Powerstroke

Question 6

Depolarization release into membrane regions called

Answer 6

Transverse tubules (t tubules)

Question 7

——- activates troponin

Answer 7

Ca +2

Question 8

ATP requiring steps

Answer 8

Powerstroke
Myosin detaches from actin

Question 9

—-.– removes acetylcholine from synaptic cleft

Answer 9

Acetylcholine esterase

Question 10

Load remains constant muscle shortens

Answer 10

Is o tonic contraction

Question 11

Tension develops but bone and load is not moved

Answer 11

Isometric contraction

Question 12

The motor neuron and all the muscle fibers it innervates

Answer 12

Motor unit

Question 13

The staircase effect

Answer 13

Treppe

Question 14

Optimal length of muscle

Answer 14

Max crossbridges are possible

Question 15

-…..- caused by shortage of neurotransmitters in NMJ

Answer 15

Neuromuscular fatigue