1. Chapter 35 Nervous system Unit 10 :

2. Tissue Types: Epithelial Connective Muscle Nervous

3. Epithelial tissue = covers & protects or secretes (glands)

4. Connective tissue = provides structure

5. Muscle tissue = creates movement

6. Nervous tissue = transmits impulses

7. Functioning Unit Neuron = nerve cell Star-shaped cell with numerous processes that conduct impulses

8. Divisions of Nervous system Central Nervous System Includes brain & spinal cord

9. Divisions of Nervous system Peripheral = includes nerves leading to & from the central nervous system –Cranial nerves = brain (to or from) head & face –Spinal nerves = spinal cord (to or from) skin & muscles Autonomic nerves = spinal cord (to or from) internal organs under involuntary control

11. Interneuron

12. “wide with fright” “heavy breathing” heart beats faster “butterflies” in stomach “white as a ghost”

13. The Brain Brain stem = includes medulla & pons –Controls involuntary actions & internal organs Cerebellum –Controls balance & coordination (posture & muscle tone) Cerebrum –Controls voluntary actions, the senses, intelligence, emotion & memory

15. The Senses Taste receptors in taste buds of tongue –Sweet, sour,bitter, salt Smell receptors in upper nasal cavity –Gaseous stimulation Touch receptors in skin, etc –Touch, pressure, heat, cold

17. The Ear Auditory canal = vibrations pass through to… Tympanic membrane (eardrum) 3 ossicles = hammer, anvil, stirrup Cochlea = fluid-filled spiral with nerve endings that are sensitive to vibrations Auditory nerve = carries information to brain Semicircular canals = for equilibrium Eustachian tubes = (to mouth) balances pressure

19. The Eye Cornea = light containing images passes through… Iris (with pupil) = colored muscle to regulate light Lens = behind pupil; to focus image on… Retina = receives image on fovea (focal point) –Cones = sensitive to light –Rods = functions without light Optic nerve = carries information to brain