Neurons Unplugged The Structure and Function of Brain Cells

The video provides an overview of neurons, highlighting their structure and function. It explains how neurons are interconnected, forming complex networks in the brain. The video details the parts of a neuron, including dendrites, axons, and axon hillocks, and describes how signals, or action potentials, are transmitted. The role of myelin sheaths in speeding up signal transmission is discussed, along with the concept of synapses where neurons connect. The video concludes with a recap and a self-test to reinforce learning.

Approximately how many neurons are present in the human brain?

• 50 billion

• 1 trillion

• 100 billion

• 10 million

What is the primary function of dendrites in a neuron?

• Produce energy for the neuron

• Transmit signals to muscles

• Receive information from other neurons

• Store genetic information

Which part of the neuron decides whether to send a signal?

• Cell body

• Axon hillock

• Dendrites

• Axon

What is the term for the signal that travels down the axon?

• Neural impulse

• Action potential

• Neurotransmitter

• Synaptic transmission

What is the function of myelin sheaths?

• Produce neurotransmitters

• Connect neurons to blood vessels

• Insulate the axon and speed up signal transmission

• Store nutrients

What are the gaps between myelin sheaths called?

• Nodes of Ranvier

• Dendritic spines

• Axon terminals

• Synaptic clefts

Which disease is associated with the breakdown of myelin sheaths?

• Alzheimer's disease

• Parkinson's disease

• Multiple sclerosis

• Epilepsy

What is the role of axon terminals in a neuron?

• Transmit signals to other neurons or muscles

• Generate action potentials

• Receive signals from other neurons

• Store neurotransmitters

What is the name of the connection point between two neurons?

• Myelin sheath

• Axon hillock

• Synapse

• Dendrite

What is the small gap between neurons at a synapse called?

• Node of Ranvier

• Axon terminal

• Synaptic cleft

• Dendritic spine