Chptr 29 PART 2 Sensory

Chemoreceptors are organized into taste buds _.

• In the upper portions of nasal passages.

• On the tongue.

• That are also responsible for smell.

• With long cilia that are constantly in motion.

A molecule that is detected by our sense of smell first binds to _.

• Specific receptor proteins on the cilia of receptor cells located in the epithelium of the upper nasal cavity.

• Hairs that extend beyond the mucous layer and line the upper and lower nasal cavities.

• Special mechanoreceptor cells located in the epithelium of the lower nasal cavity.

• Special receptor proteins located at the surface of thermoreceptor cells lining the upper nasal cavity.

Integration of sensory stimuli occurs in _.

• Highly specialized receptors such as the organ of Corti.

• All receptors.

• The brain.

• The central and peripheral nervous systems.

One hypothesis explaining animals' abilities to detect a magnetic field and use it to navigate is that sensory cells detect electrical fluctuations influenced by Earth's magnetic field. Which evidence, if it were true, would support this hypothesis?

• Sensory cells of an organism known to use magnetic fields to navigate show an increase in action potential firing when in the presence of electrical fluctuations.

• Sensory cells of an organism known to use magnetic fields to navigate show a decrease in action potential firing when in the presence of electrical fluctuations.

• Sensory cells of an organism known to use magnetic fields to navigate show a greater density of negative ions on the outside of its plasma membrane.

• Sensory cells of an organism known to use magnetic fields to navigate produce greater amounts of enzymes sensitive to electrical fluctuations.

If you close your eyes, hold your hands over your eyes for a short time, and then uncover your eyes, your pupils will be _.

• A darker color than normal.

• Smaller than normal.

• Larger than normal.

• A lighter color than normal.

Mechanoreceptors are not evenly spaced on your body. What part of the body might be expected to have mechanoreceptors located closer together?

• Eyelid.

• Heel of foot.

• Top side of arm.

• Pad of toe.

Mechanoreceptors are not evenly spaced on your body. What part of the body might be expected to have mechanoreceptors located farther apart?

• Lip.

• Fingertip.

• Underside of wrist.

• Abdomen.

Mechanoreceptors are not evenly spaced on your body. What is an advantage of having mechanoreceptors located closer together?

• Allows for less sensitivity to potentially harmful stimuli.

• Allows for a greater sensitivity to changes in temperature.

• Allows for a greater sensitivity to potentially harmful stimuli.

• Allows for less sensitivity to changes in temperature.

Mechanoreceptors are not evenly spaced on your body. What is an advantage of having mechanoreceptors located farther apart?

• Allows often used parts of the human body to feel pressure more severely than areas where mechanoreceptors are closer together.

• Allows often used parts of the human body to feel pressure less severely than areas where mechanoreceptors are closer together.

• Allows for greater dendrite regeneration after the body has experienced excessive pressure.

• Allows for a thicker epidermis than in areas where mechanoreceptors are closer together.

Individuals medically diagnosed with "dry eyes" experience feelings of dryness, itchiness, burning, and general irritation in their eyes. Dry eyes can be caused by a decreased production of tears by the tear-producing glands in the eyes. What treatment would help alleviate dry eyes?

• Stimulating production of aqueous humor.

• Blocking the eyelid openings used to drain tears.

• Stimulating production of vitreous humor.

• None of them.