B265FS07pT4 - PR EME D41 1.C OM P 1.C OM Last Years Test OM...

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Unformatted text preview: - PR EME D41 1.C OM P 1.C OM Last Years Test OM - PR EME D41 1. How many color opsins do humans have ? a. red and green b. blue and yellow c. blue green and red d. blue, green, red and yellow - PR EME D41 1.C 2. What is the approximate refractive index of the cornea ? a. 1.00 b. 4.00 c. 1.32 d. .68 - PR EME D41 1.C OM 3. When there is maximal load on a muscle and the velocity of its shortening is zero, the muscle contraction is a. isotonic b. isometric c. doing the most work d. most efficient - PR EME D4 11. COM - PR EME D4 11. COM 4. We have said many things about the eye and its operation are “backwards”. What is included a. light passes through layers of neurons before reaching receptors b. rods release an inhibitory neurotransmitter when not stimulated c. sodium channels of the rods are open when not stimulated d. a and b e. a, b and c 11. COM 5. In perception of _________________, a coiled springy protein pulls open an ion channel when it is displaced. a. chemicals b. heat c. sound d. light e. pain COM - PR EM ED4 6. Which ion moves through this channel ? a. potassium moves into the cell b. potassium moves out of the cell c. sodium moves into the cell d. sodium moves out of the cell - PR EM ED4 11. 7. Which sensory receptor cell actually produces an action potential ? a. rod cell b. cone cell c. hair cell of the ear d. olfactory receptor COM - PR EM ED4 11. COM 8. Low pitched sounds are perceived by hair cells a. in the cochlea, closest to the middle ear b. in the most distal region of the cochlea c. by one of the 4 rows of cells in the organ of Corti d. by cells randomly scattered on the sensory membrane - PR EM ED4 11. COM - PR EM ED4 11. 9. Which arrangement allows the greatest movement for the shortest contraction of the muscle ? a. first class (teeter totter) b. second class (wheel barrow) c. third class d. all are equal PRE MED 411 .CO MPRE M ED4 11. COM 10.The mole rat of the film perceived sounds a. using very large ears b. using echolocation c. as vibrations in the ground d. as ripples in the water OM 1.C D41 - PR EME OM Match - PR EME D41 1.C a. rod cells b. olfactory receptors c. hair cells d. more than one e. none D41 1.C OM - PR EME D41 1.C OM 11. Na channels are open when not stimulated 12. Mechanical properties of actinomyosin force channel opening 13. Signal reception is mediated by G proteins 14. There are 100 different gene configurations for receptors 15. Information may reach the brain through alternate pathways with little cortical processing 16. In lower animals, large lobes of the forebrain are dedicated to this sense 11. COM - PR EME 17. The energy level of sound, light or chemical presented to a receptor may be lower than the energy level of the train of AP that it produces a. true b. false COM - PR EME D4 18. Action potentials produced by the eye always differ in amplitude from those produced by the ear. a. true b. false 11. COM - PR EME D4 11. 19. The farther a potential travels in a bipolar cell the smaller it becomes a. true b. false COM - PR EM ED4 33. Which muscle type is constantly in use to maintain posture ? a. slow-twitch oxidative b. smooth glycolytic c. fast twitch oxidative red d. fast twitch glycolytic white - PR EM ED4 11. 34. Contains an associated ATPase a. actin b. myosin c. troponin d. tropomyocin COM - PR EM ED4 11. COM 35. Which of the following is not true of sensory receptors ? a. they all produce action potentials b. they all act as transducers c. they all produce graded changes in membrane polarity d. they all are capable of amplification of the incoming signal PRE MED 411 .CO MPRE M ED4 11. COM - PR EM ED4 11. COM - PR EM ED4 11. 39. Lateral inhibition means that a. receptors on the sides of the eyes are always inhibited b. light causes all receptors to hyperpolarize c. when a spot of light is focused on a receptor, those on either side are inhibited d. because of the optic chiasma, messages from the right eye are processed by the left brain ...
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This document was uploaded on 11/04/2011 for the course BIL 265 at University of Miami.

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