Physiology

Question 0

Electrical activity travels down axon

Answer 0

2

Question 1

Activate motor neuron

Answer 1

1

Question 2

When electrical activity gets to axon terminal-> axon terminal becomes permeable to Ca2+

Answer 2

3

Question 3

Ca2+ enters axon terminal

Answer 3

4

Question 4

Ach released into synaptic cleft via exocytosis

Answer 4

5

Question 5

Ach diffuses across synaptic cleft

Answer 5

6

Question 6

Ach binds to Ach receptors

Answer 6

7

Question 7

Sodium channels open-> sodium rushes into sarcoplasm

Answer 7

8

Question 8

Generation of electrical activity in sarcolemma

Answer 8

9

Question 9

Electrical activity travels down sarcolemma and t-tubules

Answer 9

10

Question 10

Change membrane permeability of terminal cisternal

Answer 10

11

Question 11

Ca2+ released into sarcoplasm

Answer 11

12

Question 12

Ca2+ binds to troponin

Answer 12

13

Question 13

Troponin moves and pulls tropomyosin with it

Answer 13

14

Question 14

Active sites on actin are exposed

Answer 14

15

Question 15

Myosin heads attach to active sites and form cross bridges form

Answer 15

16

Question 16

Myosin heads pivot towards m-line(center) and pull myofilaments along

Answer 16

17

Question 17

ATP binds to myosin head and causes the cross bridge to break

Answer 17

18

Question 18

ATP hydrolyzes and the myosin head recocks

Answer 18

19

Question 19

16-19 are going to be a repeated until the myofilaments are pulled as close as they can.

Answer 19

20