Human Nervous System

Question 1

Why is coordination and control essential in the human body?

Answer 1

It is essential for maintaining internal balance (homeostasis), responding to stimuli, and performing daily activities, including voluntary and involuntary actions.

Question 2

What is the structure of the human nervous system?

Answer 2

The human nervous system consists of the central nervous system (CNS) which contains the brain and the spinal cord, and the peripheral nervous system (PNS) contains the ganglia and nerves.

Question 3

What are the types of neurons?

Answer 3

The types of neurons are motor neurons and sensory neurons.

Question 4

How is a nerve impulse transmitted?

Answer 4

1. Nerve impulse reaches axon terminal at the end of the axon.
2. A chemical called a neurotransmitter is released into the space between neurons (synapse).
3. Neurotransmitter carries the message from the axon of one neuron to the dendrite of the next neuron.
4. Dendrite receives the chemical message and sends off an electrical signal.