31) Our “oldest” sense, which works in a very similar way in insects, is the sense of:
32) Which statement about the sense of smell in humans is most accurate?
A) Smell is about equally as strong as taste.
B) One hundred different receptor varieties allow us to discern about 100 scents.
C) Combinations of over 300 receptors allow us to discern thousands of scents.
D) Ciliated cells rapidly move scent molecules to the brain for rapid analysis.
33) The basic taste sensations are different in that each sensation works through:
A) a different chemical reaction route in a taste cell.
B) a similar chemical reaction route in a taste cell.
C) different ciliated receptor varieties, just like smell receptors.
D) different taste nerves.
34) A person is blindfolded and then given a piece of apple to eat while the scent of pineapple is wafted around his or her nose. The person would most likely guess that he or she is eating a/an:
C) new type of fruit.
D) 50-50 mixture of apple and pineapple.
35) The cochlea is part of the:
A) inner ear.
B) outer ear.
36) The value of the three small bones of the middle ear is that they:
A) translate vibration into nerve impulses.
B) translate solid vibration into internal liquid vibration.
C) amplify vibrations by concentrating them into a smaller area.
D) connect the eardrum to the nerves of hearing.
37) How do hair cells of the cochlea translate vibration into nervous impulses?
A) Bending cilia lead to ion flow and neurotransmitter release.
B) Pulling hairs trigger an action potential.
C) Vibrating hairs open voltage sensitive channels.
D) Moving cilia break molecules at their bases.
38) The iris of the human eye is composed partly of:
A) nervous tissue.
B) empty space.
D) connective tissue.
E) smooth muscle.
39) Which part of the human eye detects colored light?
A) enzymes in ganglion cells
B) rhodopsin molecules
C) aqueous humor
40) When light enters the eye, it is bent, or refracted, first by the:
D) vitreous body.
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