Nervous system

Front

What is a stimulus?

Back

A stimulus is something that causes a reaction or response in an organism. It can be anything from a sound, light, or touch that triggers a sensory response.

Front

What is a response?

Back

A response is the reaction of an organism to a stimulus. It can be voluntary (like moving your hand away from a hot stove) or involuntary (like blinking when something comes close to your eyes).

Front

What is the central nervous system?

Back

The central nervous system (CNS) consists of the brain and spinal cord. It is responsible for processing information and controlling body functions.

Front

What is the role of the brain in the nervous system?

Back

The brain acts as the control center of the body, processing information and coordinating responses to stimuli.

Front

What is a sensory neuron?

Back

A sensory neuron is a type of neuron that carries information from sensory receptors (like those in the eyes and skin) to the brain.

Front

What is a motor neuron?

Back

A motor neuron is a type of neuron that carries signals from the brain and spinal cord to muscles, causing them to contract and produce movement.

Front

What is the function of the spinal cord?

Back

The spinal cord transmits signals between the brain and the rest of the body. It also coordinates reflexes.

Front

What is a reflex action?

Back

A reflex action is an automatic response to a stimulus that does not involve conscious thought, such as pulling your hand away from a hot surface.

Front

What is the difference between voluntary and involuntary actions?

Back

Voluntary actions are controlled by conscious thought (like deciding to walk), while involuntary actions happen automatically without conscious control (like breathing).

Front

What is the role of neurons in the nervous system?

Back

Neurons are the basic building blocks of the nervous system. They transmit information throughout the body via electrical and chemical signals.