Anatomy - Unit 7 - Nervous System (Mid-Unit Review #2)

Front

What is depolarization in the context of the nervous system?

Back

Depolarization is the process during which the membrane potential becomes less negative (more positive), leading to the generation of an action potential.

Front

What is the threshold level of stimulus?

Back

The threshold level of stimulus is the minimum level of stimulus required to trigger an action potential in a neuron.

Front

What role does the sympathetic nervous system play?

Back

The sympathetic nervous system controls the 'fight or flight' response, preparing the body for stressful situations.

Front

What is repolarization in the context of the nervous system?

Back

Repolarization is the process during which the membrane potential returns to a more negative value after depolarization.

Front

What is hyperpolarization?

Back

Hyperpolarization is when the membrane potential becomes more negative than the resting potential, making it less likely for an action potential to occur.

Front

What is the resting membrane potential?

Back

The resting membrane potential is the electrical potential difference across the membrane of a resting neuron, typically around -70 mV.

Front

What is an action potential?

Back

An action potential is a rapid, temporary change in the membrane potential of a neuron that allows for the transmission of signals.

Front

What is the role of neurotransmitters?

Back

Neurotransmitters are chemical messengers that transmit signals across synapses from one neuron to another.

Front

What is the difference between the sympathetic and parasympathetic nervous systems?

Back

The sympathetic nervous system prepares the body for 'fight or flight' responses, while the parasympathetic nervous system promotes 'rest and digest' functions.

Front

What is the function of myelin sheath?

Back

The myelin sheath insulates axons and increases the speed of electrical signal transmission along the neuron.