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- Complete this concept map summarizing sensory receptors.
Problem 1
Problem 2
Which of the following sensory receptors is incorrectly paired with its category?
a. Hair cell . . . Mechanoreceptor
b. Taste receptor . . . Chemoreceptor
c. Rod . . . Electromagnetic receptor
d. Olfactory receptor . . . Electromagnetic receptor
Problem 3
Which of the following are not known to be present in human skin?
a. Thermoreceptors
b. Electromagnetic receptors
c. Pressure receptors
d. Pain receptors
Problem 4
What do the receptor cells in the lateral line system along the sides of a shark and the cochlea of your ear have in common?
a. They use hair cells to sense sound or pressure waves.
b. They are organs of equilibrium.
c. They use electromagnetic receptors to sense pressure waves in fluid.
d. They use granules that signal a change in position and stimulate their receptor cells.
Problem 5
If you look away from this book and focus your eyes on a distant object, the eye muscles _________ and the lenses _________ to focus images on the retinas.
a. Relax . . . Flatten
b. Relax . . . Become more rounded
c. Contract . . . Flatten
d. Contract . . . Become more rounded
- How does your brain determine the volume and pitch of sounds?
Problem 6
Problem 7
Eighty-year-old Mr. Johnson was becoming slightly deaf. To test his hearing, his doctor held a vibrating tuning fork tightly against the back of Mr. Johnson's skull. This sent vibrations through the bones of the skull, setting the fluid in the cochlea in motion. Mr. Johnson could hear the tuning fork this way, but not when it was held away from the skull a few inches from his ear. The problem was probably in the _________ . (Explain your answer.)
a. Auditory nerve leading to the brain
b. Hair cells in the cochlea
c. Bones of the middle ear
d. Fluid of the cochlea
- When you first sit down to read in a coffee shop, the surroundings seem very loud. Yet after a few minutes reading you realize you hardly notice the noise at all. Why is that?
Problem 8
- Hold your right eye closed. With your left eye, look at the + in the image below. Starting from about two feet away, slowly bring your head closer while looking at the +. What happens to the dot when you get close to the image? What property of the eye's structure does this exercise demonstrate?
Problem 9
- Construct a graph in which membrane potential is on the y axis and time is on the x axis. Then draw the action potentials that occur when a bitter flavor is absent, followed by the action potentials that result when a person tastes a bitter flavor.
Problem 10
Problem 11
We know that sea turtle hatchlings use Earth's magnetic field to navigate. Do they also use light cues from the moon to get from the sand to the ocean waves? Outline an experiment to answer this question.
- Have you ever felt your ears ringing after listening to loud music? Can this permanently impair your hearing? Should manufacturers of music devices and producers of concerts be required to warn consumers? What effect might warnings have?
Problem 12