Bio Nervous System Flashcard Made From Class Notes

Front

What happens when sodium enters the neuron during a nerve impulse?

Back

The neuron depolarizes (-70 --> +30mV)

Front

What change occurs across the cell membrane of a neuron during an action potential?

Back

Voltage change

Front

What is the impulse of electricity along the axon called?

Back

Action potential

Front

Sensory neurons are also called ____________ neurons.

Back

Afferent

Front

What is the synaptic cleft?

Back

The gap between axon terminals and dendrites.

Front

What is the resting potential of a neuron?

Back

Approximately -70mV.

Front

What is the role of neurotransmitters in the nervous system?

Back

They transmit signals across the synaptic cleft.

Front

What type of neuron carries signals away from the central nervous system?

Back

Efferent neurons.

Front

What is the function of myelin sheath?

Back

To insulate axons and increase the speed of nerve impulse transmission.

Front

What occurs during repolarization of a neuron?

Back

The neuron returns to its resting potential after depolarization.