Transcript Resting membrane potential

<MEDICAL INSTRUMENTATION>
4 TEAM
2005200422 박웅섭(1등)
2009103850 류문영,
2006200408 마진영, 2009103851 박주원
Nerve Cell
Axon : 없을 수 도 있고 짧은
것도 있고 1m에 달하는
것도 있다.
Pulse 형태의 action
potential 전송
4. Bio Potential - 1) Electrical Activity of Excitable Cells
Nerve Cell
-한 개의 뉴런이 평균 1000
개의 시냅스 구성
-Many pre synapse의 합이
potentials 문턱치를 초
과하면 새로운 action
potential 발생
4. Bio Potential - 1) Electrical Activity of Excitable Cells
Sensory nerve input
4. Bio Potential - 1) Electrical Activity of Excitable Cells
Sensory nerve input
4. Bio Potential - 1) Electrical Activity of Excitable Cells
Sensory nerve input
4. Bio Potential - 1) Electrical Activity of Excitable Cells
Sensory nerve input
4. Bio Potential - 1) Electrical Activity of Excitable Cells
Motor nerve output
4. Bio Potential - 1) Electrical Activity of Excitable Cells
신경세포의 막(membrane) 전위
이온의 농도차 유지가 안되면 외부자극이 들어와
전압이 발생되지 않는다. (죽은 세포)
4. Bio Potential - 1) Electrical Activity of Excitable Cells
Resting membrane potential
4. Bio Potential - 1) Electrical Activity of Excitable Cells
Resting membrane potential
4. Bio Potential - 1) Electrical Activity of Excitable Cells
Resting membrane potential
4. Bio Potential - 1) Electrical Activity of Excitable Cells
Resting membrane potential
-1.Ｅ(electric field)내에서의 이동
<coulomb force에 의한 이동>

4. Bio Potential - 1) Electrical Activity of Excitable Cells
Resting membrane potential
4. Bio Potential - 1) Electrical Activity of Excitable Cells
Resting membrane potential
- Gradient
h ( x, y ) 
4. Bio Potential - 1) Electrical Activity of Excitable Cells
h
h
ax 
ay
x
y
Resting membrane potential
Electric field 내에서 전하가 받는 힘은 전
하를 운동(이동)시킨다.-진공에서는 가속도
운동, 용액 등 매질 속에서는 등속운동
(+)charge는 E방향으로 힘을 받고
(-) charge는 E반대 방향으로 힘을 받는다.
4. Bio Potential - 1) Electrical Activity of Excitable Cells
Resting membrane potential
△t 의 시간동안에 A를 통과한 이온의 개수?
4. Bio Potential - 1) Electrical Activity of Excitable Cells
Resting membrane potential
4. Bio Potential - 1) Electrical Activity of Excitable Cells
Resting membrane potential
-2. Diffusion에 의한 이동
Diffusion의 경우는 (+)든(-)든
농도가 높은 곳에서 낮은 곳으로 이동한다.
4. Bio Potential - 1) Electrical Activity of Excitable Cells
Resting membrane potential
4. Bio Potential - 1) Electrical Activity of Excitable Cells
Resting membrane potential
4. Bio Potential - 1) Electrical Activity of Excitable Cells
Resting membrane potential
4. Bio Potential - 1) Electrical Activity of Excitable Cells
Resting membrane potential
4. Bio Potential - 1) Electrical Activity of Excitable Cells
Resting membrane potential
4. Bio Potential - 1) Electrical Activity of Excitable Cells
Resting membrane potential
4. Bio Potential - 1) Electrical Activity of Excitable Cells