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Neuron Introduction and Classification

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Questions and Answers

What characteristic distinguishes unipolar neurons from bipolar neurons?

Unipolar neurons have multiple dendrites, while bipolar neurons have only one.

Unipolar neurons can undergo division, while bipolar neurons cannot.

Unipolar neurons have one pole, while bipolar neurons have two poles. (correct)

Unipolar neurons are found only in adults, while bipolar neurons are present in embryos.

Which statement accurately describes multipolar neurons?

Multipolar neurons generate impulses more quickly than unipolar neurons.

Multipolar neurons can only be found during embryonic development.

Multipolar neurons possess a single pole with both axon and dendrites.

Multipolar neurons typically have more than two dendrites and one axon. (correct)

What main structural feature do neurons lack that distinguishes them from most other body cells?

Cell membrane

Cytoplasm

Centrosome (correct)

Nucleus

How are neurons categorized based on the length of their axons?

Neurons are not categorized by axon length. Signup and view all the answers

During which developmental stage are unipolar neurons typically found?

During embryonic development Signup and view all the answers

Which of the following correctly describes the poles of bipolar neurons?

Bipolar neurons have two poles: one for the axon and one for the dendrite. Signup and view all the answers

What is the primary role of dendrites in neurons?

To receive signals from other neurons. Signup and view all the answers

Study Notes

Neuron Introduction

Neurons are the structural and functional units of the nervous system
Similar to other cells, they contain a nucleus and organelles in the cytoplasm
Different from other cells because they have branches called axons and dendrites
Neurons lack a centrosome, preventing cell division

Neuron Classification

Neurons are categorized by different methods, including the number of poles
Three types of neurons based on the number of poles:
- Unipolar neurons: Possess only one pole, with both axon and dendrite originating from it
- Bipolar neurons: Have two distinct poles, one for the axon, and one for the dendrites
- Multipolar neurons: Have multiple poles, with one designated for the axon and the rest for dendrites

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Description

This quiz covers the fundamental aspects of neurons, including their structure and classification. Learn about the unique features that differentiate neurons from other cells, as well as the three types of neurons based on their morphology. Test your understanding of this essential topic in neuroscience.