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, an interneuron, and an effector.

Front

What is the role of the effector in a reflex arc?

Back

The effector is the muscle or organ that responds to the stimulus, carrying out the action of the reflex.

Front

What is the function of the interneuron in a reflex arc?

Back

The interneuron processes the information received from the sensory neuron and transmits signals to the effector.

Front

What is the stimulus in a reflex arc?

Back

The stimulus is the initial signal that triggers the reflex action, often detected by sensory receptors.

Front

Identify the effector in the knee-jerk reflex.

Back

The effector in the knee-jerk reflex is the quadriceps muscles.

Front

What type of neuron carries signals from sensory receptors to the spinal cord?

Back

Sensory neurons carry signals from sensory receptors to the spinal cord.

Front

What is the pathway of a reflex arc?

Back

The pathway of a reflex arc typically follows this sequence: stimulus → sensory neuron → interneuron → motor neuron → effector.

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 act.

Front

What is the role of the spinal cord in a reflex arc?

Back

The spinal cord acts as a relay center, processing the information and coordinating the reflex response.

Front

What happens during the knee-jerk reflex?

Back

When the patellar tendon is tapped, it stretches the quadriceps muscle, triggering a reflex that causes the leg to kick.