Human Nervous System

Front

What is a stimulus?

Back

A stimulus is any change in the environment that causes a response in an organism. For example, bright light causes you to squint.

Front

What are motor neurons?

Back

Motor neurons are nerve cells that conduct impulses from the brain or spinal cord to muscles, enabling movement.

Front

What is the central nervous system?

Back

The central nervous system (CNS) is the main control center of the body, consisting of the brain and spinal cord, coordinating body activities.

Front

What is the brain?

Back

The brain is the main control center of the body, responsible for processing information and controlling voluntary actions.

Front

What is motor output?

Back

Motor output is the response generated by the brain, which sends signals to muscles to produce movement.

Front

What are sensory neurons?

Back

Sensory neurons are nerve cells that receive information from sensory receptors and send impulses to the brain.

Front

What is the function of the spinal cord?

Back

The spinal cord connects the brain to the rest of the body and transmits signals between them.

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 role of the autonomic nervous system?

Back

The autonomic nervous system controls involuntary bodily functions, such as heart rate and digestion.

Front

What is the difference between voluntary and involuntary actions?

Back

Voluntary actions are controlled consciously, while involuntary actions occur automatically without conscious control.