Nervous System

Front

What is the function of the Node of Ranvier?

Back

The Node of Ranvier is a gap in the myelin sheath of a nerve fiber that facilitates the rapid conduction of nerve impulses through saltatory conduction.

Front

What are dendrites?

Back

Dendrites are the branched extensions of a neuron that receive signals from other neurons and transmit them to the cell body.

Front

What is the myelin sheath?

Back

The myelin sheath is a fatty layer that surrounds the axon of some neurons, providing insulation and increasing the speed of nerve impulse transmission.

Front

What are glial cells?

Back

Glial cells are non-neuronal cells in the nervous system that support, nourish, and protect neurons.

Front

What is the role of the meninges?

Back

The meninges are protective membranes that cover the brain and spinal cord, providing support and cushioning.

Front

What is the brain stem responsible for?

Back

The brain stem controls basic life functions such as breathing, heartbeat, and blood pressure.

Front

What is the cerebellum's function?

Back

The cerebellum is responsible for coordination, balance, and fine motor control.

Front

What is the difference between sensory and motor neurons?

Back

Sensory neurons carry signals from sensory receptors to the central nervous system, while motor neurons transmit signals from the central nervous system to muscles and glands.

Front

What is an action potential?

Back

An action potential is a rapid change in electrical charge across a neuron's membrane that occurs when a neuron sends a signal.

Front

What is the role of neurotransmitters?

Back

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