Explore
Post homework questions online and get free homework help from tutors.
Learn More
Improve Grades
Help Others
Save Time
Accessible 24/7
There are currently 446 guests browsing and 11 members online. So far today, 258 students have registered.
Related Images
762
0
02/17/12

22
0
02/19/17

25
0
02/21/17
Poll
Which is the WORST study habit?
Studying after midnight
Not taking notes on your reading
Studying without a plan
Skipping classes
Memorization based on repetition
If you would like to vote in this poll, please login or register

New Topic  
wrote...
Posts: 9
Credits: 0
Rep: 0 0
5 years ago
Under most circumstances, once an axon’s membrane potential reaches threshold (about -55 mV in mammals), an action potential is automatically triggered. The graph below shows the changes in membrane potential that occur in an axon membrane that is initially at resting potential.
 In response to a stimulus, the membrane slowly depolarizes until the membrane potential reaches a particular value, called threshold. At threshold, a rapid depolarization of the membrane occurs and an action potential is initiated.
Drag the labels onto the flowchart to show the sequence of events that occurs once the membrane potential reaches threshold
 
the first box says membrane potential reaches threshold
choices are
membrane potential rises, na ions rush in, many voltage gated na channels open, na ions rush out
Read 11777 times
1 Reply
replies
wrote...
Donated
Valued Member
5 years ago
Channels in the plasma membranes open, allowing sodium to move into the cytoplasm to cause a temporary reversal in electrical charges. So NA+ ions rush in.
Volunteers are seldom paid; not because they are worthless, but because they are PRICELESS!
New Topic      
This topic is currently locked from adding new posts. Only administrators and moderators can reply. If you'd like to contribute to this topic, start a new thread and make reference to this one. Otherwise, contact a moderator for more options.