Understanding the Nervous System and Neurons

The video tutorial explains the nervous system's role in sensing the environment, focusing on neurons as the basic building blocks. It covers the structure and function of neurons, including their components: cell body, dendrites, and axon. The video details how neurons receive, process, and transmit information through electrical signals called nerve impulses, which travel from one neuron to another via synapses, ultimately reaching the brain or spinal cord.

What is the primary function of the nervous system?

• To produce hormones

• To circulate blood

• To sense things around us

• To digest food

What is another name for a neuron?

• Blood cell

• Nerve cell

• Muscle cell

• Brain cell

Which part of the neuron contains the cytoplasm and the nucleus?

• Dendrites

• Axon

• Cell body

• Myelin sheath

What are dendrites?

• Electrical signals in the neuron

• Protective sheath of the neuron

• Short projections that extend from the cell body

• Long projections of the neuron

What is the myelin sheath made of?

• Water and salts

• Carbohydrates and proteins

• Fats and proteins

• Vitamins and minerals

How do dendrites function in a neuron?

• They protect the neuron

• They pick up impulses from receptors and pass them to the cell body

• They produce electrical signals

• They transmit impulses to the brain

What is the junction called where an axon passes impulses to another neuron?

• Synapse

• Receptor

• Cell body

• Dendrite