Podcast Beta
Questions and Answers
What is the function of the dendrite and cell body in neurons?
What kind of potentials are produced in the cell body due to incoming signals?
Which statement best describes graded potentials?
In what part of the neuron are graded potentials primarily generated?
Signup and view all the answers
What happens when graded potentials reach a certain threshold?
Signup and view all the answers
What primary cells are responsible for forming the myelin sheath in the Peripheral Nervous System (PNS)?
Signup and view all the answers
What is the main structural composition of the myelin sheath?
Signup and view all the answers
Which of the following statements about the myelin sheath is incorrect?
Signup and view all the answers
Which function is NOT associated with the myelin sheath?
Signup and view all the answers
What is the consequence of damage to the myelin sheath?
Signup and view all the answers
Study Notes
Neuron Input Zone
- Dendrites and the cell body serve as the neuron's input zone.
- Graded potentials are produced in the cell body in response to incoming signals.
Myelin Sheath
- Schwann cells form the myelin sheath in the peripheral nervous system (PNS).
- The myelin sheath is a thick layer composed of lipoprotein.
- In myelinated fibers, action potentials are generated at the Nodes of Ranvier.
- Saltatory conduction occurs in myelinated fibers, where the impulse jumps from node to node, skipping over the myelinated portion of the axon.
Saltatory Conduction
- Saltatory conduction is a rapid form of conduction in myelinated fibers.
- The impulse jumps over sections of the fiber covered with insulating myelin.
Contiguous Conduction
- Action potentials are regenerated at every point along the axon in contiguous conduction.
Comparing Conduction
- Saltatory conduction propagates action potentials faster than contiguous conduction because the action potential doesn't need to be regenerated at the myelinated sections.
- Oligodendrocytes myelinate axons in the central nervous system (CNS).
- Axons myelinated by oligodendrocytes in the CNS do not regenerate.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Related Documents
Description
Explore the essential concepts of neuron structure and function, focusing on the input zones and the significance of myelin sheath in conduction. This quiz covers topics such as graded potentials, saltatory and contiguous conduction, and their implications for neural signaling. Test your understanding of these key neuroscience principles.
