Quiz 14 October 2009

1. Quiz14 October 2009 Action Potential Conduction Velocity Lab Synapses Somatic and Autonomic Nervous System Answer key on last slide

2. 1. Which of the following is directly responsible for the release of NT from the presynaptic terminal? a. Influx of calcium into the terminal b. Efflux of calcium from the terminal into ECF c. Hyperpolarization d. Influx of sodium e. Influx of potassium

3. 2. Two different synapses active simultaneously can _____ summate. Spatially Temporally Tetanically Presynaptically

4. 3. How do MAO inhibitor drugs work? Increase the release of norepinephrine and dopamine into cleft Speed up degradation of norepinephrine and dopamine Decrease the release of norepinephrine and dopamine into cleft Slows degradation of norepinephrine and dopamine

5. 4. Which are examples of biogenic amine neurotransmitters? Dopamine Norepinephrine Acetylcholine Glutamate GABA serotonin Catecholamines

6. 5. Which ganglia can be found in chains that are connected to each other close to the spinal cord? Sympathetic Parasympathetic Somatic Cervical Dorsal root

7. 6. Which system has ganglia that lie within or close to the organs they innervate? Dorsal Root Sympathetic Parasympathetic Somatic

8. 7. Norepinephrine is released from____. somatic motoneurons Parasympathetic preganglionicneurons Parasympathetic postganglionic neurons Sympathetic preganglionic neurons Sympathetic postganglionic neurons The adrenal medulla into the bloodstream

9. 8. Adrenergic receptors found on effector organs are stimulated by________. Parasympathetic neurons Sympathetic neurons Somatic neurons Pathetic neurons

10. 9. Muscarine is an agonist for Muscarinic acetylcholine receptors Adrenergic receptors Nicotinic acetylcholine receptors Tobacco receptors AMPA receptors

11. 10. The somatic nervous system innervates __________. Cardiac muscle Glands Striated muscle Skeletal muscle Your brain Smooth muscle

12. 11. Which is the best approximation for action potential conduction velocity in human ulnar nerves? 10 m/s 1 m/s 50 m/s 100 m/s

13. 12. Which drug(s) can be used to paralyze skeletal muscle? acetylcholine glutamate muscarine nicotine curare atropine

14. 13. Ways by which the effects on the postsynaptic cell can be enhanced are: Presynaptic facilitation High frequency of action potentials in the presynaptic terminal Adding an agonist for the receptors on the postsynaptic cell Blocking the reuptake of NT into the presynaptic terminal Adding drugs that prevent the breakdown of NTs in the synaptic cleft.

15. 14. When you simulated the ulnar nerve transcutaneously, an action potential was produced and conducted __________. Only in motor axons Orthogradely in sensory axons Retrogradely in sensory axons Orthogradely in motor axons Retrogradely in sensory axons

16. 15. Which is true for the muscarinic acetylcholine receptor: Is activated by muscarine Is found at the neuromuscular junction Is an inotropic receptor Is found on neuronal cell bodies in the autonomic ganglia Is found on glands and smooth muscles

17. 16. The NMDA receptor Is activated by NMDA Is found at the neuromuscular junction Is a metabotropic receptor Is blocked by Ca++ in the pore when the membrane is within 20 mV of resting potential is ligand- and voltage- gated Is found at synapses that have AMPA receptors.

18. 17. The superior, middle, and inferior cervical ganglion Are part of the parasympathetic division Controls heart function Participates in the regulation of pupillary diameter Receives synapses from axons whose cell bodies are in the thoracic and lumbar segments of the spinal cord Has neuronal cell bodies that have nicotinic acetylcholine receptors.

19. 18. The vagus nerve Provides sympathetic innervation to the heart Provides sympathetic innervation to the lungs Provides sympathetic innervation to viceral organs in the thoracic and abdominal cavities Consists of axons preganglionic parasympathetic neurons

20. Answers • 1 a • 2 a • 3 d • 4 abfg • 5 ad • 6 c • 7 ef • 8 b • 9 a • 10 cd • 11 c • 12 e • 13 abcde • 14 bcde • 15 ae • 16 aef • 17 bcde • 18 d