ch 10 pt 3 anatomy

Question 1

What is connectin?

Answer 1

Stabilizes thick filaments

Question 2

What is Duchenne muscular dystrophy?

Answer 2

Sarcolemma damaged during muscle contraction

Question 3

Purpose of mitochondria?

Answer 3

Energy cell for production of ATP

Question 4

Purpose of myoglobin?

Answer 4

Cells allows oxygen storage used for ATP production

Question 5

Purpose of glycogen?

Answer 5

Stored for when fuel is needed quickly

Question 6

What is motor unit?

Answer 6

A motor neuron that talks to different muscle fibers

Question 7

Gross movement

Answer 7

Thousands of muscle fibers and large amount of force

Question 8

Fine-tuning movement

Answer 8

Less than 5 muscle fibers and precise control of force

Question 9

Fibers of a motor unit are

Answer 9

Dispersed throughout the muscle

Question 10

Neuron and muscle moving in is called?

Answer 10

Neuromuscular junction

Question 11

3 ways to remove ACh from cleft

Answer 11

AChE, diffusion, reuptake (pull ACh back in)

Question 12

What is synaptic knob?

Answer 12

Expanded tip of the motor neuron axon

Question 13

What do synaptic vesicles contain?

Answer 13

ACh

Question 14

What does ACh do in synaptic knob?

Answer 14

Diffuses across cleft and binds to receptor

Question 15

What is motor end plate?

Answer 15

Specialized region of sarcolemma with numerous folds; Many ACh receptors

Question 16

What is synaptic cleft?

Answer 16

Narrow fluid-filled space

Question 17

RMP of muscle cell is

Answer 17

-90 mV