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Defective or missing______ cause color blindness.
a. hair cells c. cone cells
b. rod cells d. neuroglia
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Solved in 2 steps
- Night vision begins with stimulation of_______ . a. hair cells c. cone cells b. rod cells d. neurogliaAside from the lens, damage to the ________ can affect the eye’s ability to focus light. a. iris b. cornea c. pupil d. retina____ provides the major internal reinforcement of the posterior part of the eyeball, and helps to keep the retina pressed firmly against wall of eyeball (formed ONLY before brith). A. macula lutea B. vitreous humor C. ciliary zonule D. aqueous humor What type of cells in the eye have axons leaving the retina via the optic nerve for vision? A. bipolar cells B. photoreceptors C. ganglion cells D. rods and cones In terms of eye reflexes, extrinsic eye muscles are responsible for medial eye movements that is essential for near vision. This movement is called _______ (both eyes are directed toward the near object viewed). A. visual acuity B. binocular vision C. depth perception D. convergence
- I. Also known as the bubble boy illness? A. Rheumatoid Arthritis B. Lupus C. Asthma D. SCID II. This type of diseases affects the optic nerves, which is essential for proper vision. A. Nystagmus B. Glaucoma C. Color Blindness D. Cataract III. Inability or decreased ability to see colors it usually caused by impairment of cones. A. Color Blindness B. Cataract C. Nystagmus D. Blindness IV. This refers to a method in which a person is protected from a disease by receiving a vaccine. A. Vaccination B. Immunization C. Inoculation D. Immunity boosterThe optic nerve is formed by __________. a. ganglion cell dendrites b. ganglion cell axons c. bipolar cell dendrites d. bipolar cell axonsNight Blindness is caused by thedeficiency of Vitamin ______.A. KB. CC. B12D. A
- _____relay messages from the brain and spinal cord to muscles and glands. a. Motor neurons c. Interneurons b. Sensory neurons d. NeurogliaWhen we move our heads from left to right, hair cells cause a(n) ____________ of action potentials, which is later registered as a change in orientation. a. constant rate b. increase c. either an increase or decrease d. decreaseThe ciliary body/ muscle change the shape of the _____________. a.sclera b.optic disc c.retina d.cornea e.lens
- Resolution is __________ with a longer wavelength of light.a. improved. c. not changedb. worsened. d. not possibleMatch the function or definition to the structure: _____ A. Lens 1. Has pigment producing cells and blood vessels, keeps inside eye dark _____ B. sclera 2. The colored part of the eye, which controls amount of light entering _____ C. retina 3. Area where the nerve fibers from retina converge and leave eye _____ D. fovea centralis 4. Region of the retina that provides the sharpest vision _____ E. iris 5. Transparent structure found in eye and held in place by ligaments _____ F. optic disc 6. White portion of the eye is the outer layer _____ G. choroid coat 7. Inner layer of the eye which contains the photoreceptorsAn elderly neighbor was diagnosed with an astrocytoma tumor in the brain. This cancer affects what types of cell? a. ependymal cells b. microglia c. astrocytes d. satellite cells