Welcome to Ch 7...The Sensory Systems
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***If you are absent for a midterm, you are expected to make

 it up the day you return 

***GRADES ARE NON-NEGOTIABLE...THEY ARE EARNED
.
***The 2nd Semester is More rigorous and challenging than the
 
1st semester-so improve your strategies for this class...

***Your text, notes, and this webpage are the only study guides you need...Anything extra is a plus...

***REMEMBER...THIS WEBPAGE IS MANDATORY AND AN INTEGRAL PART OF 

THIS COURSE!

Semester Exam Schedule:

Dec. 16th 1st/2nd period exam

Dec. 17th 3rd/4th period exam

Dec. 18th 5th/6th period exam


Time:

7:20-9:00 exams

9:00-9:10 Break/class change-we will ring a bell @ 9:05 to start moving students.  

9:10-10:45 exams




Memorize for Assessments!
***Olfaction: smell/nose...nerve II
***Optic/Opthalmic: eye/vision...nerve  II,III, IV, VI 
***Tactile: touch...replaced by sense Equilibrium
***Gustation: taste...nerve VII, IX, XII
***Lingual = tongue( ex. sublingual = under tongue)
***Papillae(plural)-bumps contain taste buds
***Auditory/Oto: Hearing/Ear...nerve VIII
***Touch: Meissner's corpuscles/Pacinian = Pressure
***Myringotomy-surgical incision into ear(tubes)
***Best eyesight, hearing and smell: Cats not dogs...
***Katman: red green colorblindness
***Tinnitus-ringing in ears
***Rhinitus(allergic)-inflammation of mucous membranes(produce histamines-take anti-histamines-Benadryl)

Receptors:
Baroreceptors(blood pressure)
Photoreceptors: light
Thermoreceptors: temperature
Mechanoreceptors-touch or sound
Chemoreceptors: chemicals-smell and taste
***Know if you add some nerve #'s, how to write in roman numerals using cranial nerves.


Friday-12/13...CW: Post test...same test you took in August ton see  what you already knew about the human body...It didn't count then but will now, 4 months later...Midterms start Monday...DO NOT COME TARDY!!
HW: Review Study guides and your notes....Midterm is 10% of Semester grade...
Wednesday-12/11..CW: .Midterm Study Guide-Q1...Get into study groups...
***Goal: Try to answer as many questions as you can without looking them up- Put question mark next to those questions you're not sure about...
In study groups...compare answers and discuss why they are correct or incorrect choices...
HW: bring in 2nd Q study guide tomorrow...always check webpage...
Thursday-12/12...CW: Midterm Study Guide Q2...Get into study groups...All members participate...Do not copy answers from a member but discuss correct/incorrect answers...
HW: 1st Q Post-test tomorrow...always check webpage...
Ch 7-The Senses video notes.docx Ch 7-The Senses video notes.docx
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Type : docx
Monday-12/9...CW: Make-up tests  today...
***Ch 7-The Senses Video notes...it is above!!
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The Outer Ear

  • Pinna (auricle)-cartilage covered by skin placed on opposite sides of the head
  • auditory canal (also called the ear canal)
  • outer boundary of tympanic membrane

The Middle Ear

  • eardrum(tympanic membrane)
  • ossicles (3 tiny bones that are attached)
    • malleus (or hammer) - long handle attached to the eardrum
    • incus (or anvil) - the bridge bone between the malleus and the stapes
    • stapes (or stirrup) - the smallest bone in the body
  • The Inner Ear

    • oval window - connects the middle ear with the inner ear
    • semicircular ducts - filled with fluid; attached to cochlea and nerves; send information on balance and head position to the brain
    • cochlea - spiral-shaped organ of hearing; transforms sound into signals that get sent to the brain
    • eustachian(auditory) tube - drains fluid from the middle ear into the throat behind the nose
Intro to Ch 7-Senses Video Notes...
...short video...it is above on Special senses...
HW: Watch the Otoscope video below...Always check webpage...Print out study guides when they are posted for a grade...
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***External Auditory Meatus: opening from external to Middle ear...
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ear diagram to label



Young, crying child with a middle ear infection. Diagram of the location of the infected middle ear.

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Tuesday-12/10...CW: Otoscope Lab...Why check ears: looking for infection and Cerumen...
***Earwax, also known by the medical term cerumen, is a gray, orange, or yellowish waxy substance secreted in the ear canal of humans and other mammals. It protects the skin of the human ear canal, assists in cleaning and lubrication, and also provides some protection against bacteria, fungi, insects, and water.
***Cerumen: earwax...First, it protects and moisturizes the skin of ear canal, preventing dry, itchy ears. Second, it contains special chemicals that fight off infections that could hurt the skin inside the ear canal. Finally, it acts as a shield between the outside world and the eardrum.Too much and it will impair hearing...
***Never use Q-tips in ears as you may push wax further in ear...
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***Cerumen = Earwax...
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***Because most kids have had infections in both ears, surgery is often done in both; this is called a bilateral myringotomy, or BMT. A tiny tube, called a pressure equalization (PE) or tympanostomy tube, is inserted into the eardrum to ventilate and equalize pressure in the middle ear.

***Otitis media: An ear infection (acute otitis media) is most often a bacterial or viral infection that affects the middle ear, the air-filled space behind the eardrum that contains the tiny vibrating bones of the ear. Children are more likely than adults to get ear infections.

Young, crying child with a middle ear infection. Diagram of the location of the infected middle ear.


Image result for ear tubes

***An otoscope or auriscope is a medical device which is used to look into the ears. Health care providers use otoscopes to screen for illness during regular check-ups and also to investigate ear symptoms. An otoscope potentially gives a view of the ear canal and tympanic membrane or eardrum.
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CW
How to read an eye chart....Snellen Eye chart...

20/20 vision is considered "normal" vision, meaning you can read at 20 feet a letter that most human beings should be able to read at 20 feet.

Videos from today are below...

***Eye chart video:  https://youtu.be/kMwy06mAV5U

***Using an Otoscope...to check ears for Cerumen and infection...

***Eye disorders:  https://youtu.be/i-unhWI_qLU

***Otoscope video: https://youtu.be/b80LyZRZOFY

***Cerumen(earwax) video: https://youtu.be/PsDNx-Hya1I

HW: always review and reread ch 1-2 in text...

Eye charts can be configured in various ways, but generally, if during an eye test you can read the big E at the top but none of the letters lower than that, your vision is considered 20/200. That means you can read at 20 feet a letter that people with "normal" vision can read at 200 feet. So at 20/200, your visual acuity is very poorExample of a Snellen eye chart and a tumbling E chart..Above is How a Snellen eye chart and a "tumbling E" chart might look at your eye doctor's office. The tumbling E chart tests the visual acuity of young children and others who can't read letters aloud. Sometimes they present symbols and pictures for children.

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Colorblindness is genetic and CARRIED on the X chromosome by the mom...passed down to the son...But the mom has 2 X chromosomes so there is a 50% chance .Carriers do not exhibit the trait-only carry it!The mom can pass it down to the daughter who again carries it and if she has a son, he has a 50% chance of being colorblind...and so on.
***Video and the Ishihara colorblind test...
   https://youtu.be/sB28zwvY4Zg
HW: Review ch 3-4 in text and notes...
***As you notice, the test is specifically to identify red-green colorblindness...Blue-yellow colorblindness is extremely rare...
***About 8% of males, and 0.6% of females, are red-green color blind in some way or another, whether it is one color, a color combination, or another mutation.
***Deuteranopia-can only see 2-3 hues in contrast to the normal 7(ROYGBIV)...

Ishihara Color Blindness Test 1


Ishihara Color Blindness Test 8
 

Podcast 12-Eye Anatomy-S Thomas.MP3


Form groups of 3 BEFORE YOU START THE LAB-DON'T WASTE TIME!
Pd 1-Flatulence, Pd 2-Afterimages, Pd 3-5-Reaction Time
***You must improvise...Glass jars replaced by plastic cups...

***gelcaps used instead of tablets...
***Always use common sense and follow directions!
***NEVER TASTE ANYTHING IN A LAB!!
***NO EATING/DRINKING DURING A LAB!!

Lab 1: Know why simethicone is taken for gas relief(flatulence)...
Lab 2: The most interesting color afterimages are negative afterimages. If you stare at the red color for 30 seconds or more, the cells in your retina that respond to red will fatigue and will fire less. When you switch over to a white surface, your eyes subtract the red and you see its complementary color green.
Lab 3: 
 




***Because most kids have had infections in both ears, surgery is often done in both; this is called a bilateral myringotomy, or BMT. A tiny tube, called a pressure equalization (PE) or tympanostomy tube, is inserted into the eardrum to ventilate and equalize pressure in the middle ear.

***Otitis media: An ear infection (acute otitis media) is most often a bacterial or viral infection that affects the middle ear, the air-filled space behind the eardrum that contains the tiny vibrating bones of the ear. Children are more likely than adults to get ear infections.Young, crying child with a middle ear infection. Diagram of the location of the infected middle ear.

Image result for tubes in ears

***An otoscope or auriscope is a medical device which is used to look into the ears. Health care providers use otoscopes to screen for illness during regular check-ups and also to investigate ear symptoms. An otoscope potentially gives a view of the ear canal and tympanic membrane or eardrum.

Image result for using otoscope





Podcast 11-The Eye-S Thomas.MP3


***Video from today-  https://youtu.be/D7XZg3IbYfU


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Podcast 10-Cranial nerves-R'riana and taliya.MP3


***Eye video from today...https://youtu.be/4kpXKu5QKww

***Here is a fun video on parts of the eye...
https://youtu.be/eDIma_Ai1Rc

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***If a bright light hits your eyesyour pupils get smaller because you don't need that much light to see. Ah, but this one has a twist. Because bright light can damage the eyeyour pupils are also getting smaller to protect your retina.

***Shining a Light on Pupil Constriction. You've seen it on television: A doctor shines a bright light into an unconscious patient's eye to check for brain death. If the pupil constricts, the brain is OK, because in mammals, the brain controls the pupil.

***Whether eye dilation during an exam is necessary depends on the reason for your exam, your age, your overall health and your risk of eye diseases. The eye drops used for dilation cause your pupils to widen, allowing in more light and giving yourdoctor a better view of the back of your eye.



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***A cataract below,  is a clouding of the normally clear lens of your eye. For people who have cataracts, seeing through cloudy lenses is a bit like looking through a frosty or fogged-up window. Clouded vision caused by cataracts can make it more difficult to read, drive a car (especially at night) or see the expression on a friend's face.Surgery is recommended.
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***Bacterial Conjunctivitis(pink eye-contagious)

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