The video provides an in-depth look at the nervous system, focusing on its role as a communication network. It explains the three types of neurons: sensory, relay, and motor, and their functions in transmitting signals. The structure of neurons, including cell bodies, dendrites, and axons, is detailed, highlighting how axons are insulated to speed up signal conduction. The video also covers synapses, the junctions between neurons, and how neurotransmitters facilitate signal transmission. The content concludes with a summary of neuron types and synapse functions.

What is the primary function of the nervous system?

• To digest food

• To circulate blood

• To store energy

• To relay messages throughout the body

Which type of neuron carries signals from receptors to the central nervous system?

• Relay neurons

• Sensory neurons

• Intermediate neurons

• Motor neurons

What is the role of motor neurons?

• To carry signals to effectors

• To detect stimuli

• To connect neurons

• To insulate axons

Which part of the neuron receives information from other neurons or the external environment?

• Cell body

• Nucleus

• Dendrites

• Axons

What is the function of the insulating sheath around axons?

• To slow down nerve impulses

• To detect stimuli

• To connect neurons

• To speed up the rate of conduction

What do motor end plates cause?

• Receptors to detect stimuli

• Signals to slow down

• Neurons to connect

• Muscle fibers to contract

What is a synapse?

• An insulating sheath

• A part of the cell body

• A junction between two neurons

• A type of neuron

What triggers the release of a neurotransmitter at a synapse?

• Arrival of an electrical impulse

• Secretion of hormones

• Detection of a stimulus

• Contraction of muscle fibers

What is the role of neurotransmitters in synapses?

• To carry signals to effectors

• To diffuse across the synapse and bind with receptors

• To detect stimuli

• To insulate axons

How many types of neurons are there?

• One

• Two

• Three

• Four