WK 2: Membranes and Action potentials

<p>Positive ions enter the cell (C)</p> Signup and view all the answers

<p>Threshold (C)</p> Signup and view all the answers

<p>It becomes more positive (D)</p> Signup and view all the answers

<p>It becomes less negative (D)</p> Signup and view all the answers

<p>Around 1 millisecond (D)</p> Signup and view all the answers

<p>All or None principle (D)</p> Signup and view all the answers

<p>Covershoot (B)</p> Signup and view all the answers

<p>Voltage-gated ion channels (D)</p> Signup and view all the answers

<p>Hyperpolarization (D)</p> Signup and view all the answers

<p>Axon hillock (D)</p> Signup and view all the answers

<p>Sodium conductance (A)</p> Signup and view all the answers

<p>Depolarization (C)</p> Signup and view all the answers

<p>Alan L. Hodgkin and Andrew F. Huxley (D)</p> Signup and view all the answers

<p>Threshold (D)</p> Signup and view all the answers

<p>From axon hillock to axon terminals (A)</p> Signup and view all the answers

<p>To interpret, store, and respond to information received from inside and outside the body (D)</p> Signup and view all the answers

<p>Hyperpolarization (B)</p> Signup and view all the answers

<p>Threshold (D)</p> Signup and view all the answers

<p>Propagation (D)</p> Signup and view all the answers

<p>Resting membrane potential (C)</p> Signup and view all the answers

<p>Excitable membrane (A)</p> Signup and view all the answers

<p>To transmit signals to other neurons or to muscles or glands (A)</p> Signup and view all the answers

<p>Multipolar neuron (C)</p> Signup and view all the answers

<p>-65 mV (A)</p> Signup and view all the answers

<p>Electrochemical signals (D)</p> Signup and view all the answers

<p>Cell membrane (D)</p> Signup and view all the answers

<p>Membrane potential (C)</p> Signup and view all the answers

The difference in electrical charge between the inside and outside of a neuron when it is not actively transmitting a signal.

A rapid change in membrane potential that travels along the axon of a neuron.

The process by which an action potential is generated and transmitted along the axon of a neuron.

The state of a neuron when it is not actively generating an action potential. It is characterized by a negative charge inside the cell relative to the outside.

The minimum amount of depolarization required to trigger an action potential. This is the point at which the neuron 'fires'.

The process of making the membrane potential more positive.

The process of making the membrane potential more negative.

Special proteins embedded in the cell membrane of neurons that open and close in response to changes in membrane potential.

The specialized region at the beginning of the axon, where action potentials are initiated.

The movement of ions into a neuron that causes the membrane potential to become more negative.

The movement of ions into a neuron that causes the membrane potential to become more positive.

The principle that an action potential is either fully generated or not at all. There are no partial action potentials.

The brief period after an action potential when the membrane potential is more negative than usual. It is a short period of time when the neuron is less excitable.

The rapid reversal of the membrane potential during an action potential, where the inside of the neuron briefly becomes more positive than the outside.

The specialized protein channels in the cell membrane of neurons responsible for transmitting signals from one neuron to another.

The space between two neurons where communication occurs.

A chemical messenger that travels across the synapse to transmit a signal from one neuron to another.

The process by which the neurotransmitter is released from the presynaptic neuron and binds to receptors on the postsynaptic neuron.

The process by which neurotransmitters are removed from the synapse, ending the signal.

Neurons that receive information from the sensory organs.

Neurons that carry information from the brain and spinal cord to the muscles and glands.

Neurons that connect other neurons within the brain and spinal cord.

The part of the neuron that receives signals from other neurons.

The long, slender part of the neuron that transmits the action potential away from the cell body.

The fatty substance that insulates axons, increasing the speed of action potential propagation.

The gaps in the myelin sheath along the axon where action potentials are regenerated.

The process by which the nervous system interprets, stores, and responds to information received from inside and outside the body.

The ability of the brain to change and adapt in response to experience.