Graded Potentials in Neurons

These flashcards cover key terms and concepts related to graded potentials in neurons, including definitions and properties necessary for understanding their function in neural signaling.

Graded Potentials

Changes in membrane potential that vary in size, as opposed to being all-or-nothing, and are used to signal the intensity of stimuli.

EPSP (Excitatory Postsynaptic Potential)

A graded potential that makes the postsynaptic cell more likely to fire an action potential by depolarizing it.

IPSP (Inhibitory Postsynaptic Potential)

A graded potential that makes the postsynaptic cell less likely to fire an action potential by hyperpolarizing it.

Resting Membrane Potential

The electrical potential across the membrane of a neuron at rest, typically around -70 mV.

Threshold Potential

The critical level to which the membrane potential must be depolarized to initiate an action potential, typically around -55 mV.

Generator Potential

A type of graded potential elicited in sensory receptors in response to a stimulus.

Decremental

A property of graded potentials where they decrease in size as they propagate along the membrane over distance.

Non-Specific Monovalent Cation Channel

An ion channel that allows the flow of various cations into the cell, playing a role in generating EPSPs.

Local Potentials

Another term for graded potentials, indicating their action over short distances.

Pacemaker Potentials

Graded potentials in the heart that contribute to the rhythmic contractions of cardiac muscle.