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- In X-ray imaging, a film often displays white areas. This is due to: (a) High absorption. (b) Low absorption. (c) High reflection. (d) Low reflection. (e) Low refraction. and why?Can Dolt Exercise 1: Indicate the correct answer(s) and correct the false ones: 1- Light can be detected by human eye. ( ) 2- The speed of light is 300,000 m/s. ( ) 3- Light, like sound, cannot propagate in vacuum ( ) 4- Moon is an example on luminous objects ( ) 5- Light is an example on waves. (O4. Frequency (a) (b) (c) (d) (e) selectivity of the inner hair cells is greatly enhanced by: force generated by the opening of the mechanotransduction cells. channel in inner hair force generated by the opening of the mechanotransduction channel in outer hair cells. myosin motors at the tips of the stereocilia. voltage-dependent changes in length of the outer hair cells. All of the above
- 29. Which of the following is a correct statement about the cells of the human retina? A) Cone cells can detect color, but rod cells cannot. B) Cone cells are more sensitive to light than rod cells are. C) Cone cells, bit not rod cells, have a visual pigment. D) Rod cells are most highly concentrated in the center of the retina. 30. What structural feature(s) contribute(s) most to the diverse adaptations for animal movement? A) sensory system B) skeletal system C) muscular system D) nervous system E) B and C only1.) The rods absorb light and initiate a neural impulse to the brain when. A.) rhodopsin splits into retinal and opsin thereby stopping the release of an inhibitory neurotransmitter B.) retinal and opsin combine into rhodopsin thereby releasing a stimulatory neurotransmitter C.) iodopsin splits into photopsin and retinal thereby stopping the release of an inhibitory neurotransmitter D.) retinal and photopsin combine into iodopsin thereby releasing a stimulatory neurotransmitter 2.) After a neuronal membrane has become depolarized its resting potential is reestablished when A.) Na^ + diffuse into the neural fibre B.) Na^ + diffuse out the neural fibre. C.) K^ + diffuse into the neural fibre D.) K^ + diffuse out the neural fibre 3.) The middle car chamber is an airfilled in the head"which is adapted to allow free movement of the tympanum as it vibrates. Unless the pressure in the chamber…63- Which of the following regarding the lens is false: a- Focusing the image on the sclera. b- An increase in the opacity called cataract. c- ciliary contractions lead to focus images from near objectives. d- More flattened lens leads to focus image from far objectives.
- 4. (a) David cannot view objects clearly if they are further than 0.80 m. His lens-to-retina distance is 2.0 cmWhat is the problem with his eyes? What should be the optical power of his corrective glasses? Neglectthe distance between the glasses and his eyes.6. What is not a part of the human eye? a) retina b) eye lens c) optical nerve head d) all of the above are parts of human eye 7. Healthy human eye is most sensitive to: a) light wavelength of 380 nm b) light wavelength of 560 nm c) light wavelength 780 nm d) human eye is equally sensitive to all light wavelengths 8. What is true about myopia and hyperopia? a) shortsighted person sees clearly up close, farsighted sees clearly at distance. b) shortsighted person sees blurry at distance, farsighted sees blurry up close. c) shortsighted person sees clearly at distance, farsighted sees clearly up close. d) A and B are correct 9. What is Jaeger test intended for? a) to check distant vision acuity b) to check near vision acuity c) to check the color perception d) A and B are correct 10. Eye accommodation is: a) focusing on close objects b) focusing on distant objects e) ability to focus on the close or distant objects d) ability to adjust to changes in brightnessWhich of the following best describes the function of a camera type eye? A) To form high-definition images that are transmitted to the brain. B) To gather and concentrate light through a lens onto retinal tissue which generates an impulse that is transmitted to the brain. C) To protect the optic nerve which generates an impulse that is transmitted to the brain. D) To detect vibrations through the vitreous body which generates an impulse that is transmitted to the brain.
- 20. According to one of the YouTube videos, PHANTOM SENSATION is when an object (i.e. a rubber hand) that represents one part of your body (i.e. your real hand) can be mentally connected to your body and you feel some sort of pain the object is hit with a hammer True or False? Why?Which of the following situations is associated with movement and position in the human body? a. Statoliths in statocysts bend sensory hairs and trigger actionpotentials. b. If sensory hairs in the utricle are oriented horizontally andthose in the saccule are oriented vertically, the person is lyingdown. c. When the head rotates, the endolymph in the semicircularcanal pulls the cupula with it to activate sensory hair cells. d. Displacement of the utricle and saccule generates actionpotentials. e. If the body is spinning at a constant rate and direction, thecupula is displaced and action potentials are initiated.7. From back to front, the order of the cells in the retina are... A) Ganglion cells, photoreceptor cells, bipolar cells B) Photoreceptor cells, ganglion cells, bipolar cells C) Photoreceptor cells, bipolar cells, ganglion cells D) Ganglion cells, bipolar cells, photoreceptor cells
