Thermometers: heat and cold. Photoreceptor’s: eyes, light. Competitors: chemicals, odors, taste, body fluid composition. Inspectors: pain receptors. Microprocessors: hearing, physical deformation of a cell or tissue caused by vibration, touch, pressure and stretch. -Origin of the stimulus Osteoporosis: sense stimuli external to the boy. They Include the receptors for balloons, hearing, taste, coetaneous sensation heat.
Interceptors: detect stimulus in the internal organs such as stomach, intestine, and bladder, produce feelings pain and cause. Preprocessors: sense the position and movements of the body parts. They occur in muscle, tendons, and joint capsule. -By distribution General (sympathetic) senses: widely distributed, simple in structure. We do not perceive consciously such as blood pressure. Special senses: limited to the head- are Inverted In the cranial nerves. Balloons, hearing, equilibrium, taste, and smell. Brandywine: most potent pain stimulus known. And promotes healing.
Enumerator: sense of pain is lost due to the nerve damage. Inspectors do not occur in the brain and liver however they occur in the engines. Durra, arachnoids,pip. Histamine, prostaglandin, and serotonin also stimulate inspectors. Analgesic- pain-relieving. CANS has these. It is tied to opium, morphine, and heroin In the brain. Endogenous voids- internally produce plummets substance. Endorphins, donnishly, naphthalene Produce feelings of pleasure. Taste(Gestation) and Smell (olfactory) FOUR EXHIBITS ON THE TONGUE: Filmdom papillae: no taste buds, tiny spikes, food texture.
Evaluate papillae- contain half of all taste buds. Foliate papillae-no taste buds, form parallel bridges on the sides of the tongue. Funneling papillae- Like mushrooms, each has about three taste buds, located on the apex. Supporting cells in taste buds are sequestration’s ciliated columnar epithelial cells. HOT PEPPERS STIMULATE FREE NERVE ENDINGS (PAIN) NOT A TASTE BUD. Triggering nerve 3 structures that are involved in taking the sense of taste from the taste buds to the brain- facial nerve, selenographer nerve, and vague nerve. Than to the medulla obbligato than to the thalamus and after to the gustatory cortex.
Region where the nasal cavity perceptive to smell stimulus- olfactory receptors, bipolar neurons. Taste cells are epithelial and smell cells are neurons. Live only for about 60 days. Receptors- olfactory mucosa. Pathway of smell from the olfactory receptors to the temporal lobes of the brain- receptors, nerve, bulb, tracts, thalamus, cortex. Hypothalamus- mangled- limbic system. Hippopotamus. Anamosa- people can’t smell due to head Injuries that tear the olfactory nerves, Receptors for hearing- cochlea and balance vestibular apparatus.
Cerement- earwax. Mixture of secretions of ceremonious and sebaceous glands and dead skin cells. Middle ear is located in the tympanis cavity. Tympanis membrane also known as eardrum. Auditory tube- equalizes air pressure, allows throat infections to spread to the middle ear. Icicles: mallets, incurs, stapes. Are located in the tympanis cavity. Middle ear infection- Otis media- common in children, Autonomously- lancing(cut) tympanis membrane draining fluid from tympanis cavity. Inner ear filled with indolently, floating in periphery.
Cushion. Cochlea has three fluid- filled chambers separated by membranes. The superior chamber is called scale vestibule and the inferior one is the scale tympani. They are filled with periphery. The middle chamber is cochlear duct (scale media). Filled with Indolently. It is separated from the scale vestibule above by a thin vestibular membrane and from the scale tympani below by a much thicker basilar membrane. Spiral organ- converts vibrations into nerve impulses. Hair cells have long microvolt called stereotypical.
Gelatinous Dictatorial membrane The way the hearing sense travels to the brain, Auditory pathways Each ear sends nerve fibers to both sides of the in the cochlear nuclei in the ponds— Inferior chocoholic of the mandarin -origin of the sound, processes fluctuation in pitch, and rapid head turning. – thalamus—- cortex. Conductive deafness- conditions interfere with transmission of vibrations to inner ear. – Damage to tympanis membrane, Otis media, blockage of auditory canal. And discoveries (icicles fuse together and don’t move).
Censoriously (nerve) deafness- death of hair cells or any nervous system elements concerned with hearing. (musicians, construction workers. ) Process signals about the position and movement of the body and rely information to target areas: Equilibrium Vestibular pathways- 1) cerebellum,(Coordinated head and body movements) 2) vestibule-ocular reflex center,(changes in eye movement in espouse to head movements) 3) spinal cord (maintain posture) 4) Tantalus, 5) cortex. ( perception of balance) PONDS- breathing and circulatory function. VISION: Eyebrows: provide facial expression.
Eyelids (palpable): block foreign objects, help with sleep, blink to moisten. Consists of orbicular occult muscles and tarsal plate covered with skin outside and conjunctiva inside. Tarsal glands secret oil that reduces tear evaporation , eyelashes – help keep debris from eye. Conjunctiva- transparent mucus membrane that lines eyelids and covers anterior surface of eyeball, except cornea. Secrets mucous that prevents eyeball from drying. Lachrymal secretion(tears): Dilute saline solution containing mucus, antibodies, and lissome , blinking spreads the tears toward the medial commissars.
Tear enter paired lachrymal canal via the lachrymal punctual and drain into the neoclassical duct. THREE COMPONENTS OF THE EYEBALL 3 tunics of the eye (tunics fibrosis, tunics vascular, tunics internal) -Tunics fibrosis- divided to 2 regions: Sclera (collagen’s fibers), cornea. (admits light to the eye) culinary body– forms muscular ring around lens,) iris–colored diaphragm control size of pupil its central opening) Tunics internal- Retina and beginning of optic nerve.