5 Written Questions

1. Mostly neuron cell bodies and unmyelinated fibers
2. -Biosynthetic center of a neuron
   - spherical nucleus w/ nucleolus
   - well developed golgi apparatus
   - rough ER called nissl bodies (chromatophilic substance)
   Neurofilaments
   - axon hillocte
   Nuclei
   - ganglia
3. - branched cells
   - processes wrap CNS nerve fibers, forming insulating myelin sheath
4. - one axon per cell arising from the axon hillock
   - long axons (nerve fibers)
   - occasional branches (axon collaterals)
   - (telodendria) numerous terminal branches
   - knoblike axon terminals (synaptic knobs or boutons)
   - secretory region of a neuron
   - release neurotransmitter to excite or inhibit other cells
5. -brain and spinal cord
   - integration and command center

5 Matching Questions

1. Nodes of Ranvier
2. Central process
3. Axon hillock
4. neuron function
5. Visceral afferent fibers

1. a Convey impulses from visceral organs
2. b Entering the CNS
3. c -neurons are highly irritable
   - respond to adequate stimulus by generating an action potential (nerve impulse)
   - impulse is the same regardless of stimulus
4. d - myelin sheath gaps btwn adjacent schwann cells
   - sites where axon collateral can emerge
5. e Cone shaped area from which axon arises

5 Multiple Choice Questions

1. - segmented protein lipoid sheath around most long or large diameter axons
   - protect and electrically insulate the axon
   - increase speed of nerve impulse transmission
   1. Multipolar
   2. Myelin sheath
   3. Myelin sheath in CNS
   4. Myelin sheath in PNS
2. Supporting cells
   - astrocytes (CNS)
   - microglia (CNS)
   - ependymal cells (CNS)
   - oligodendrocytes (CNS)
   - satellite cells (PNS)
   - Schwann cells (PNS)
   1. Satellite cells
   2. Ependymal cells
   3. neuron function
   4. Neuroglia (glial cells)
3. open and close in response to changes in membrane potential
   1. Unmyelinated axons
   2. Satellite cells
   3. voltage gated channel
   4. leakage channels
4. Interpretation of sensory input
   1. Neurons
   2. Anterograde
   3. Integration
   4. interneurons
5. Toward cell body (organelles to be degraded, signal molecules, viruses, and bacterial toxins
   1. Retrograde
   2. Microglia
   3. Anterograde
   4. Astrocytes

5 True/False Questions

1. Somatic (voluntary) nervous system → Conscious control of skeletal muscles

   True        False

2. Axon function → -neurons are highly irritable
   - respond to adequate stimulus by generating an action potential (nerve impulse)
   - impulse is the same regardless of stimulus

   True        False

3. Peripheral nervous system (PNS) → -Paired spinal and cranial nerves
   - carry messages to and from the CNS
   - sensory (afferent) division
   -motor (efferent) division

   True        False

4. Myelin sheath in CNS → - schwann cells wraps many times around the axon
   - neurilemma
   - nodes of ranvier
   - concentric layers of Schwann cell membrane

   True        False

5. Neurons → Excitable cells that transmits electrical signals

   True        False