Question

Chapter Fourteen New s 369 Can You Apply What You've learned? 21. Describe the structure, function and specific location of the cells 22. Describe the structure and function of microgla 23. Give the location where each of the neuron types listed is found a. anterior horn cell b. Purkinje cell c. pyramidal cell 24. Compare and contrast the structure, location, and function of neglennocytes and oligodendrocytes 25. Is it more common for brain tumors to rise from neurons or from placerat 26. Using knowledge of electrochemical gradients, describe the mechanism that explains why the resting membrane potential changes as the concentration of potassium in the ECF increases 27. Describe whether sodium or potassium has a greater effect on resting membrane potential 28 Describe how conduction velocity is impacted when temperature decreases in your explanation, refer to the effect of temperature on membrane transport mechanisms 29. Explain the roles of Ny and in action potential generation

Answer 1

The PNS has two kinds of neuroglia: schwann cells and satellite cells.

1) Schwann cells provide myelination to peripheral neurons.

2) Satellite cells are small glia that surround sensory ganglia in the ANS.

The function of Satellite cells is similar to that of astrocytes i.e, they help to regulate the external chemical environment.

Skeletal muscle satellite cells are quiescent mononucleated myogenic cells, these are located between the sarcolemma and basement membrane of terminally-differentiated muscle fibres. They are usually quiescent in adult muscle, but act as a reserve population of cells, able to proliferate in response to injury and give rise to regenerated muscle and to more satellite cells.

Satellite cells -Cell body of neuron Schwann cells (forming myelin sheath) Nerve fiber (e) Satellite cells and Schwann cells (which form myelin) surround neurons in the PNS.

satellite cells are flat cells that surround the cell bodies in the peripheral nervous system act as protective, cushioning cells   They supply nutrients to the surrounding neurons and also have some structural function.