The video explains the roles of different types of neurons: sensory neurons, interneurons, and motor neurons. It describes how these neurons work together to sense and react to stimuli, such as pain. Sensory receptors in the skin detect stimuli and send messages through sensory neurons to the spinal cord and brain. Interneurons relay these impulses, while motor neurons carry messages from the brain and spinal cord to muscles or glands, causing a reaction. The video concludes with an overview of how messages travel along the nerve network.

What is the primary function of sensory neurons?

• To relay impulses between neurons

• To carry messages from the brain to muscles

• To sense stimuli and send messages to the brain

• To stimulate glands

Which cells in the skin are responsible for detecting pain?

• Motor neurons

• Interneurons

• Effector cells

• Sensory receptors

Which type of neuron is responsible for carrying messages from the brain to muscles?

• Receptor neurons

• Motor neurons

• Interneurons

• Sensory neurons

What role do interneurons play in the nervous system?

• They relay impulses between neurons

• They sense environmental changes

• They detect pain

• They stimulate muscle contractions

What is the term for the muscle that is activated by a motor neuron?

• Neuron

• Receptor

• Effector

• Stimulus