Lectures 13-15 Flashcards
What are ions responsible for (2)
Responsible for moving ions in an out of cell to make action potential happen
responsible for difference in charge across neural membrane
What are atoms made of and what 3 things does it contain (PEN)
Made of subotomic particles
Protons
Electrons
Neurons
What charges are Protons, neurons and electrons
Protons are positive
electrons are negative
neurons are uncharged in this case
What state allows action potentials to occur? Hint: scale, balance
When there is more positive charge inside a neuron, more negative charge outside of neuron
This state of imbalance is what allows action potential to occur
What do volts measure?
Measure electrical potential
What’s the typical volt charge in humans ?
70 milivolts (mv)
What is membrane permeability and what how is it produced ?
Things that can/t permeate by ion channels
Produced by proteins
what’s 2 forces drive ion to move in or out of cell?
1 concentration gradient force
2 electrical gradient force
What is an ion(definition) Hint: Balance
Atoms that have imbalanced electrical charges
What are the two types of ions and their charges?
Anion- negatively charged
Cation-positively charged
What kind of molecule is water, and what makes it this way?
Polar molecule, one side has more negative charge, other side has more positive charge
What are cations and anions attracted to?
Anions are more attracted to positive end
Cations are more attracted to negative ends (opposites attract)
What is the cell membrane made up of?
Fatty substance, 2 fatty acids back to back create a cell membrane
What are the Cell membranes permeable (1) and non permeable chemicals (2)? (Remember BBB permeables)
Small lipid soluble molecules
can permeate
Large or electrically charged molecules cannot permeate
How do ions move in and out of cell, and what product created it?
By ion channels(holes) created by proteins