All About Axons in Neurons

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson
Download our mobile app to listen on the go
Get App

Questions and Answers

What is the primary function of an axon?

  • To carry impulses away from the cell body to other neurons. (correct)
  • To synthesize proteins for the neuron.
  • To provide structural support to the cell body.
  • To receive signals from other neurons.

Which structural characteristic is most typical of an axon?

  • Spherical and located within the cell nucleus.
  • Long and thin, extending from the cell body. (correct)
  • Cuboidal and forming the myelin sheath.
  • Short and wide with numerous branches.

In which direction does an axon typically carry a nerve impulse?

  • From other neurons towards the cell body.
  • From sensory receptors directly to the brain.
  • From the cell body to other neurons or target cells. (correct)
  • Randomly, depending on the stimulus.

What distinguishes an axon from dendrites in terms of function?

<p>Axons transmit signals, while dendrites receive them. (A)</p> Signup and view all the answers

If an axon is damaged, what immediate effect would this have on neuron function?

<p>The neuron would be unable to transmit outgoing signals. (B)</p> Signup and view all the answers

Which cellular component is continuous with the axon and provides its cytoplasm?

<p>The cell body (soma). (A)</p> Signup and view all the answers

What role do axons play in neural circuits within the nervous system?

<p>Forming connections and transmitting signals between neurons. (D)</p> Signup and view all the answers

How does the length of an axon relate to its function?

<p>Longer axons allow neurons to communicate with distant targets. (A)</p> Signup and view all the answers

Which of the following is NOT a primary characteristic of an axon?

<p>It transmits signals toward the cell body. (A)</p> Signup and view all the answers

What is the significance of the axon's connection to the cell body?

<p>It allows the axon to receive nutrients and signals from the cell body. (A)</p> Signup and view all the answers

How do axons contribute to the overall communication network within the brain?

<p>By forming pathways that transmit information between different regions. (B)</p> Signup and view all the answers

What would happen if the flow of cytoplasm within an axon was blocked?

<p>The axon would be unable to transmit nerve impulses effectively. (D)</p> Signup and view all the answers

In what way does the physical structure of the axon support its function?

<p>Its length facilitates long-distance communication within the body. (D)</p> Signup and view all the answers

How does the axon ensure that nerve impulses travel in one direction only?

<p>By initiating the impulse at the cell body and propagating it towards the terminal. (B)</p> Signup and view all the answers

Which of the following best describes the relationship between the axon and the neuron's cell body?

<p>The axon carries signals away from the cell body and is an extension of it. (D)</p> Signup and view all the answers

What would be the most likely consequence if the axon of a motor neuron were severed?

<p>Paralysis of the muscle normally controlled by the neuron. (D)</p> Signup and view all the answers

How does the axon's structure contribute to the speed of nerve impulse transmission?

<p>Myelination, when present, insulates the axon and increases transmission speed. (C)</p> Signup and view all the answers

What cellular processes within the cell body are essential for maintaining the function of the axon?

<p>Protein synthesis and transport. (A)</p> Signup and view all the answers

How does the axon contribute to the function of sensory neurons?

<p>By transmitting sensory information to the central nervous system. (C)</p> Signup and view all the answers

Consider a neuron with a damaged cell body. How would this damage directly affect the axon?

<p>The axon would likely degenerate due to lack of support from the cell body. (A)</p> Signup and view all the answers

Flashcards

Axon

A long, thin cytoplasmic extension that carries impulses away from the neuron's cell body to other neurons.

More Like This

Use Quizgecko on...
Browser
Browser