Nerve Impulses - BiologyMad A-Level Biology
Nerve Impulses - BiologyMad A-Level Biology
Nerve Impulses - BiologyMad A-Level Biology
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Action Potential<br />
What is an action potential? ……………………………………………………………………………………….….<br />
……………………..………………………………………………………………………………………………………<br />
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……………………..………………………………………………………………………………………………………<br />
Use the diagrams below to explain the following terms:<br />
Depolarisation: ……………..……………………………………..………<br />
……………………………………………………………………………...<br />
……………………………………………………………………………...<br />
……………………………………………………………………………...<br />
……………………………………………………………………………...<br />
……………………………………………………………………………...<br />
Repolarisation: : ……………..……………………………………..………<br />
……………………………………………………………………………...<br />
……………………………………………………………………………...<br />
……………………………………………………………………………...<br />
……………………………………………………………………………...<br />
……………………………………………………………………………...<br />
out<br />
in<br />
out<br />
in<br />
Na<br />
Na +<br />
Na<br />
open<br />
closed<br />
(leak)<br />
K<br />
closed<br />
(leak)<br />
Explain the ‘all or nothing event’ ……………………………………………………………………………………..…<br />
……………………………………………………………………………………………………………………………..<br />
…………………………………………………………………………………………………..…………………………<br />
What is the refractory period? ……………………………………………………………..…………………………..<br />
How do <strong>Nerve</strong> <strong>Impulses</strong> Start?<br />
……………..………………………………………………………………………………………………………………<br />
…………………………………………………………………………………………………..…………………………<br />
…………………………………………………………………………………………………..…………………………<br />
<strong><strong>Biology</strong>Mad</strong>.com<br />
K<br />
open<br />
K +<br />
-<br />
+<br />
+<br />
-
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