THE BODY AS A WHOLE EXAM 2 BIO 126 EXAM C. maintain muscle tone D. maintain bala
ID: 301709 • Letter: T
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THE BODY AS A WHOLE EXAM 2 BIO 126 EXAM C. maintain muscle tone D. maintain balance when standing USE THE SCANTRON FORM AND A #2 PENCIL. DO NOT WRITE ON EXAM. USE 34 Which of the following is not a lunction of the C. vagus D. acial 35. The seventh cranial nerve: inal A olfactory B trochlear t supplies most of the organs in the thoracic and abdom C. vagus D. facial & rochlear 37 wnich of the tolowing requires bright ight in order to distinguish colors ? C. sclera D. iris ?.rods 8. cones 38. A visuol defect caused by an iregular curvature of the conea or lens, resulting in blrred vision: C. strabismus D. astigmatism B. myopia 39. This condition is also known as nearsightedness: C. strabismus D. astigmatism A. hyperopia B. myopia 40. Which of the following is NOT an ossicle of the middle ear: A. pinna C. incuS D. malleus B. stapes 41. Receptors for equilibrium are located in what part of the ear? A. pinna B. semicircular canals C. tympanic membrane D. Eustachian tube 42. which of the following is considered a true medical emergency due to the high risk of blindness that may occur if not immediately corrected? B. macular degeneration C. diabetic retinopathy D. cataract 43. What is also called "swimmer's ear" A. otitis media 8. otitis exterma A -s an opacity of the crystalline lens or its c A. retinal detachment 8. macular degeneration C. otitis interna D. none of these options are correct C. diabetic retinopathy D. cataract o 126 EXAM 2 rev 01/2015rdExplanation / Answer
34. B.
The cerebellum coordinates voluntary movements such as posture, balance, coordination, and speech, resulting in smooth and balanced muscular activity. It is also important for learning motor behaviors.
heart beat is not a voluntary movement.
35.D
Bell's palsy/Facial palsy is a form of facial paralysis resulting from damage to the 7th cranial nerve. Bell's palsy gets its name from the 19th century Scottish surgeon, Sir Charles Bell, who was the first to describe the condition ("Palsy" is an archaic (old) word which means paralysis). Bell's Palsy is the most common cause of facial paralysis in the world. The condition afflicts around 40,000 Americans each year. The incidence rate in the US is around 20 - 30 cases per 100,000 of the population. Worldwide, Bell's Palsy afflicts approximately 10 - 30 people per 100,000 of the population.
36.C
Vagus nerve, also called X cranial nerve or 10th cranial nerve, longest and most complex of the cranial nerves. The vagus nerve runs from the brain through the face and thorax to the abdomen. It is a mixed nerve that contains parasympathetic fibres.
37.B
Cone cells, or cones, are of three types of photoreceptor cells in the retina of mammalian eyes (e.g. the human eye). They are responsible for color vision and function best in relatively bright light, as opposed to rod cells, which work better in dim light. Cone cells are densely packed in the fovea centralis, a 0.3 mm diameter rod-free area with very thin, densely packed cones which quickly reduce in number towards the periphery of the retina. There are about six to seven million cones in a human eye and are most concentrated towards the macula
38.D
Astigmatism is a vision condition that causes blurred vision due either to the irregular shape of the cornea, the clear front cover of the eye, or sometimes the curvature of the lens inside the eye. An irregular shaped cornea or lens prevents light from focusing properly on the retina, the light sensitive surface at the back of the eye. As a result, vision becomes blurred at any distance.
Astigmatism is a very common vision condition. Most people have some degree of astigmatism. Slight amounts of astigmatism usually don't affect vision and don't require treatment. However, larger amounts cause distorted or blurred vision, eye discomfort and headaches.
Astigmatism frequently occurs with other vision conditions like nearsightedness (myopia) and farsightedness (hyperopia). Together these vision conditions are referred to as refractive errors because they affect how the eyes bend or "refract" light.
The specific cause of astigmatism is unknown. It can be hereditary and is usually present from birth. It can change as a child grows and may decrease or worsen over time.
A comprehensive optometric examination will include testing for astigmatism. Depending on the amount present, your optometrist can provide eyeglasses or contact lenses that correct the astigmatism by altering the way light enters your eyes.
Another option for treating astigmatism uses a corneal modification procedure called orthokeratology (ortho-k). It is a painless, non-invasive procedure that involves wearing a series of specially designed rigid contact lenses to gradually reshape the curvature of the cornea.
Laser surgery is also a possible treatment option for some types of astigmatism. It changes the shape of the cornea by removing a small amount of eye tissue. This is done using a highly focused laser beam on the surface of the eye.
39.B.
Nearsightedness (myopia) is a common vision condition in which you can see objects near to you clearly, but objects farther away are blurry. It occurs when the shape of your eye causes light rays to bend (refract) incorrectly, focusing images in front of your retina instead of on your retina.
40.A
Nearsightedness (myopia) is a common vision condition in which you can see objects near to you clearly, but objects farther away are blurry. It occurs when the shape of your eye causes light rays to bend (refract) incorrectly, focusing images in front of your retina instead of on your retina.
41.D
Nearsightedness (myopia) is a common vision condition in which you can see objects near to you clearly, but objects farther away are blurry. It occurs when the shape of your eye causes light rays to bend (refract) incorrectly, focusing images in front of your retina instead of on your retina.
42.D
43.B
Swimmer's ear is an infection in the outer ear canal, which runs from your eardrum to the outside of your head. It's often brought on by water that remains in your ear after swimming, creating a moist environment that aids bacterial growth.
Putting fingers, cotton swabs or other objects in your ears also can lead to swimmer's ear by damaging the thin layer of skin lining your ear canal.
Swimmer's ear is also known as otitis externa. The most common cause of this infection is bacteria invading the skin inside your ear canal. Usually you can treat swimmer's ear with eardrops. Prompt treatment can help prevent complications and more-serious infections.
44.Dn opacity of the lens of the eye, usually occurring as a result of aging, trauma, endocrine or metabolic disease, intraocular disease, or as a side effect of the use of tobacco or certain medications, e.g., steroids. Cataracts are the most common cause of blindness in adults
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