Functions of the Nervous System

The video tutorial explains the nervous system, focusing on neurons as the basic building blocks. It describes the structure of neurons, including cell body, dendrites, and axons, and how they transmit messages through electric pulses. The role of supporting cells in providing nutrition and protection to neurons is highlighted. The process of neuron communication is detailed, showing how messages are passed from one neuron to another. Finally, the video provides statistics on the number of neurons in the human brain and their transmission speed.

What is the primary function of the nervous system?

• To digest food

• To transmit messages throughout the body

• To produce hormones

• To circulate blood

What are the basic building blocks of the nervous system?

• Bone cells

• Neurons

• Blood cells

• Muscle cells

Which part of the neuron receives messages?

• Cell body

• Dendrites

• Axons

• Nucleus

What is the function of axons in a neuron?

• To protect the neuron

• To receive messages

• To provide nutrition

• To carry messages out of the cell body

What are synaptic nodes?

• The main body of the neuron

• The branches at the end of axons

• The protective layer of the neuron

• The part that receives messages

What is the role of cells that support neurons?

• To form the cell membrane

• To transmit messages

• To provide nutrition and protection to axons

• To produce electric pulses

Approximately how many neurons are there in the human brain?

• 10 million

• 100 billion

• 86 billion

• 1 million

At what speed do neurons transmit messages in the body?

• 30 to 50 meters per second

• 70 to 120 meters per second

• 10 to 20 meters per second

• 150 to 200 meters per second