Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
11 Cards in this Set
- Front
- Back
|
Define neurotransmission |
Transmission of information across a synapse |
|
|
Potential difference across a plasma membrane is called the ‘______________’ |
Membrane potential |
|
|
When we have a barrier that can keep electrically charged molecules apart from one another then that barrier forms a ‘________________’. |
potential difference |
|
|
What does ‘resting membrane potential’ describe? |
Describes the membrane potential of a neuron when it is at rest. When it is ‘not doing anything’ i.e. not communicating or trying to communicate with other cells, just ‘hanging out’ or ‘doing nothing’ |
|
|
What is the resting membrane potential of neurons? |
-70mv |
|
|
What does a resting membrane potential of -70mv mean? |
The minus (-) means that the inside of the neuron has a net negative charge with respect to the outside of the neuron and that ‘net negative charge’ comes about from there being MORE negatively charged molecules on the inside of the neuron compared to the outside of the neuron. The ‘70mV’ part is the magnitude of difference between the charges on the inside and outside of the neuron. |
|
|
Potential difference across a plasma membrane is called the ‘_______________’. |
membrane potential |
|
|
Define ‘Ion’ |
An atom or molecule that has a positive or negative charge due to the loss or gain, respectively, of one or more electrons |
|
|
All living cells have a _______ potential that varies from moment to moment depending on the activities of the cell. In an _________, _______ cell, the ______________ between positive and negative ions on either side of the membrane is called the __________. Passive and active forces determine the ___________ potential. |
membrane potential; unstimulated; resting; potential difference; resting membrane potential; resting membrane potential |
|
|
The plasma membrane has more ______ leak channels than _______ leak channels and thus the membrane is more permeable ‘leaky’ to _____ than _______. |
K+ (potassium); Na+ (sodium); potassium; sodium |
|
|
Hgg |
Jjjh |
