Reflex Arc & Reflex Action

Front

What is a reflex arc?

Back

A reflex arc is a neural pathway that controls a reflex action. It typically involves a sensory neuron, a relay neuron, and an effector.

Front

What are the main components of the central nervous system (CNS)?

Back

The central nervous system (CNS) is made up of the brain and spinal cord.

Front

What is an effector in the context of a reflex action?

Back

An effector is a muscle or gland that responds to a stimulus in a reflex action.

Front

Give an example of an effector in the human body.

Back

Salivary glands are an example of an effector.

Front

What role does a sensory neuron play in a reflex arc?

Back

A sensory neuron transmits signals from sensory receptors to the central nervous system.

Front

What is the function of a relay neuron?

Back

A relay neuron connects sensory neurons to motor neurons within the central nervous system.

Front

What is a stimulus in the context of reflex actions?

Back

A stimulus is any change in the environment that can provoke a response from an organism.

Front

What is the difference between a reflex action and a voluntary action?

Back

A reflex action is an automatic response to a stimulus, while a voluntary action is a conscious decision to respond.

Front

What is the pathway of a reflex arc?

Back

The pathway of a reflex arc typically follows this sequence: stimulus -> sensory neuron -> relay neuron -> motor neuron -> effector.

Front

What is the role of the spinal cord in reflex actions?

Back

The spinal cord acts as a conduit for signals between the brain and the body and is involved in processing reflex actions.