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Neurological microstructures

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Neurological microstructures

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Questions and Answers

What are the two types of nervous tissue cells?

Neurons & neuroglia

What is the functions of neurons?

Have the property of electrical excitability - can produce action potentials

Neuroglia support, nourish and protect

True (A)

What are the two types of neuroglia in the PNS?

<p>Schwann cells (A), Satellite cells (C)</p> Signup and view all the answers

What are the two processes that emerge from a cell body?

<p>Axon, myelin sheath (D)</p> Signup and view all the answers

What is the function of dendrites?

<p>Receiving part of the neuron</p> Signup and view all the answers

What do cell bodies contain?

<p>Nucleus, cytoplasm, usual organelles, nissl bodies, neurofibrils, microtubules</p> Signup and view all the answers

What is the axon?

<p>Sending part of the neuron</p> Signup and view all the answers

What are the 3 main parts of an axon?

<p>Axon hillock, initial segment, trigger zone</p> Signup and view all the answers

Factors affecting speed of propagation?

<p>Amount of myelin, axon diameter, temperature</p> Signup and view all the answers

What are the 3 types of neurons?

<p>Multipolar, bipolar, uni polar</p> Signup and view all the answers

Flashcards

Neurons

Specialized cells that transmit electrical signals throughout the body.

Neuroglia

Supporting cells that provide nourishment, protection, and insulation to neurons.

Electrical excitability

The ability to generate and transmit electrical impulses.

Schwann cells

A type of neuroglia in the peripheral nervous system that forms the myelin sheath around axons.

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Dendrites

The branching extensions of a neuron that receive signals from other neurons.

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Axon

The long, slender extension of a neuron that transmits signals to other neurons.

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Initial segment

The junction where the axon hillock connects to the axon.

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Trigger zone

The region of the axon where action potentials are generated.

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Factors affecting speed of propagation

The thickness of the myelin sheath, the diameter of the axon, and the temperature all affect the speed of propagation.

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Multipolar neuron

A neuron with multiple dendrites and a single axon.

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Bipolar neuron

A neuron with one dendrite and one axon.

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