QUESTION 7 Which cells supply nutrients to and remove wastes from nerve cells? myocytes dendrites neurons glial chondrocytes QUESTION 8 Which type of cell produces proteins that form the tough, water-insoluble layer in the integumentary system? keratinocytes melanocytes Langerhans cells pigmented cells Granstein cells QUESTION 9 The differences in concentration of which elements produce the resting membrane potential? sodium and potassium sodium and chloride potassium and chloride chloride and calcium calcium and sodium
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QUESTION 3 Cell bodies of the peripheral nervous system are located in A. the sensory division. B. ganglia. C. the motor division. D. nerves. E. Schwann cells. QUESTION 4 The junction of a neuron with another cell is a/an A. effector. B. synapse. C. receptor D. ganglion. E. None of the above. QUESTION 5 Nissl bodies are A. part of a dendrite. B. part of the Golgi apparatus. C. areas of rough endoplasmic reticulum. D. lipid droplets. E. also called gemmules.
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Question 4 Which of the following statements is NOT characteristic of Schwann cells in Wallerian degeneration? Schwann cells provide physical guidance needed for the regrowth of the axon. Schwann cells release trophic factors that stimulate growth. Schwann cells act to clear the myelin debris with the help of macrophages. Schwann cells increase synthesis of myelin lipids in response to axonal damage. Schwann cells are responsible for myelination of axons in the peripheral nervous system.
Which of the following is the neuroglia of the peripheral nervous system? Select one: a. Astrocytes b. Schwann Cells c. Oligodendrocytes d. All of the above Put the following steps of an action potential in order: 1. Sodium ions diffuse inward, depolarizing the axon membrane 2. Impulse conduction occurs along the axon 3. Threshold potential is reached 4. Potassium ions diffuse outward, repolarizing the axon membrane
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