BIOLOGY 152 Lecture Notes - Membrane Potential, Voltmeter, Resting Potential

31 views3 pages

Document Summary

Break the problem down: body detects stimulus (light, sound, touch, chemical, temperature, etc. , sensory neuron translates this to something a cell would understand (a chemical/electrical signal, sends signal to central nervous system (cns) 4: cns directs this modified signal through motor neurons to muscle cells, to endocrine cells (to interneurons are used to filter, magnify, interpret, or ignore signal make hormones), etc. At axon terminus, it jumps to next cell. Axon membrane at rest has a negative membrane potential (-70) Voltmeter used to measure difference in charge between inside/outside of cell to determine membrane potential dif. is maintained by na+/k pump for every three na+ that leave cell, 5 k enter cell. Na+ gate opens when membrane potential > -50 mv. Def: graded potential anywhere below -50 mv (& not at resting potential) =action potential membrane repolarizes when k+ gates open.

Get access

Grade+20% off
$8 USD/m$10 USD/m
Billed $96 USD annually
Grade+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
40 Verified Answers
Class+
$8 USD/m
Billed $96 USD annually
Class+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
30 Verified Answers

Related Documents

Related Questions