PNS and Special Senses Practice Answers-1 PDF

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Practice questions and answers for peripheral nervous system and special senses material...

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Which 3 cranial nerves innervate the taste buds? Facial Glossopharyngeal Vagus Olfactory sensory receptors are located in olfactory receptor cells in the olfactory epithelium. The three major cell types in the olfactory epithelium are: basal cell, supporting cell, and olfactory sensory neurons. Olfactory nerve cells and fibers comprise which cranial nerve? Olfactory nerve In what part of the brain do olfactory nerve fibers end? Olfactory bulb What are the 3 principle white matter pathways and what are their functions? Spinothalamic – Pain and temperature sensation Dorsal Column – Fine touch, vibration, proprioception Corticospinal – voluntary motor What is located in Gray Matter? Cell Bodies, Dendrites, Supporting Cells What is located in White Matter? Myelinated axons What is a dermatome? Part of the body with sensory receptors going back to a single spinal nerve What is a myotome? One or a group of muscles receiving impulses from a single spinal nerve

MATCHING (1 or 2 answers for each item on left side) a. Fibrous layer of the eye  1. Choroid (B) 2. ciliary body (B) b. Vascular layer of the eye 3. cornea (A) c. Inner layer of the eye 4. iris (B) 5. photoreceptor sensory cells (C) 6. pigmented layer (C) 7. sclera (A)

MATCHING 1. cochlear duct (C) 2. incus (B) 3. malleus (B) 4. auditory meatus (A) 5. pharyngotympanic tube (B) 6. pinna (A) 7. saccule (D)  8. semicircular ducts (D) 9. stapes (B) 10. tympanic membrane (A) 11. utricle (D)

a. External Ear b. Middle Ear c. Inner Ear - Cochlear d. Inner Ear – Vestibular

MATCHING: AUTONOMIC SYSTEM A. Somatic sensory system B. Parasympathetic C. Sympathetic Match one of the choices above with each of the following: 1. Causes erection (vasodilation) (B) 2. Causes ejaculation (C) 3. Causes sweating (C) 4. Constricts bronchioles of lungs (B) 5. Decreases motility of digestive organs (C) 6. Decreases heart rate (B) 7. Dilates bronchioles of lungs (C) 8. Dilates pupils (C) 9. Eye (iris) constricts eye pupils (B) 10. Increases heart rate (C) 11. Inhibits gallbladder (C) 12. Increases motility of digestive organs (B) 13. Increases sweating (C) 14. Inhibits secretory glands (nasal, lacrimal, salivary, gastric, pancreas) (C) 15. Postganglionic axons secrete acetylcholine (B) 16. Postganglionic axons typically secrete norepinephrine (C) 17. Promotes urination (B) 18. Relaxes bladder wall & contracts urethral sphincter to prevent voiding (C)

19. Senses pain and temperature (A) 20. Senses fine touch, vibration and proprioception (A) 21. Stimulates adrenal medulla (C) 22. Stimulates secretory glands (nasal, lacrimal, salivary, gastric, pancreas) (B) 23. Stimulates gallbladder to contract (B)...